Service Manual

ManualsBrandsToro ManualsAeratorsProCore SR70 Aerator

Form No. 10174SL Rev B

ProCore

SR Series

(Models SR48, SR54, SR54-S, SR70, SR70-S,

SR72 and SR75)

Original Instructions (EN)

Summary of content (122 pages)

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Form No.
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Revision History Revision Date -- 2010 A 02/2018 Added revision history. B 07/2020 Updated Chassis chapter. © THE TORO COMPANY 2020 Description Initial Issue This document and all information contained herein is the sole property of The Toro Company (and/or its affiliated companies). No intellectual property rights are granted by the delivery of this document or the disclosure of its content.
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Reader Comments The Toro Company Technical Assistance Center maintains a continuous effort to improve the quality and usefulness of its publications. To do this effectively, we encourage user feedback. Please comment on the completeness, accuracy, organization, usability, and readability of this manual by an e-mail to servicemanuals@toro.
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NOTES _
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Part No. 10174SL (Rev. B) Service Manual ProCoreR SR Series Preface The purpose of this publication is to provide the service technician with information for troubleshooting, testing and repair of major systems and components on the ProCore SR series deep tine aerators: models SR48, SR54, SR54--S, SR70, SR70--S, SR72 and SR75. REFER TO THE OPERATOR’S MANUAL FOR OPERATING, MAINTENANCE AND ADJUSTMENT INSTRUCTIONS.
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Table Of Contents Chapter 3 -- Chassis General Information . . . . . . . . . . . . . . . . . . . . . . . . 3 -- 1 Service and Repairs . . . . . . . . . . . . . . . . . . . . . . . . 3 -- 2 Chapter 4 -- Coring Head (SR54 & SR70) Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Information . . . . . . . . . . . . . . . . . . . . . . . . Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service and Repairs . . . . . . . . . . . . . . . . . . . . . . .
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Chapter 1 Safety Safety Table of Contents SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . Before Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . While Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance and Service . . . . . . . . . . . . . . . . . . . . SAFETY AND INSTRUCTION DECALS . . . . . . . . . .
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Safety Instructions The ProCore SR series of deep tine aerators are designed and tested to offer safe service when operated and maintained properly. Although hazard control and accident prevention partially are dependent upon the design and configuration of the machine, these factors are also dependent upon the awareness, concern and proper training of the personnel involved in the operation, transport, maintenance and storage of the machine.
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While Operating 1. Operator should be on the tractor when starting the engine and when operating the aerator. Stay away from the aerator coring head when it is engaged. 3. Do not run tractor engine in a confined area without adequate ventilation. Exhaust fumes are hazardous and could possibly be deadly. 4. If abnormal aerator vibration is detected, disengage PTO and stop tractor immediately. Determine source of vibration and correct problem(s) before resuming the use of aerator. 5.
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Safety and Instruction Decals Numerous safety and instruction decals are affixed to the ProCore SR series deep tine aerator. If any decal becomes illegible or damaged, install a new decal. Part numbers for replacement decals are listed in your Parts Catalog. Order replacement decals from your Authorized Toro Distributor.
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Chapter 2 Product Records and Maintenance Table of Contents 1 1 2 2 2 3 3 Product Records and Maintenance PRODUCT RECORDS . . . . . . . . . . . . . . . . . . . . . . . . . MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EQUIVALENTS AND CONVERSIONS . . . . . . . . . . . Decimal and Millimeter Equivalents . . . . . . . . . . . . U.S. to Metric Conversions . . . . . . . . . . . . . . . . . . . TORQUE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . Fastener Identification . .
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Equivalents and Conversions 0.
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Torque Specifications These Torque Specifications for the installation and tightening of fasteners shall apply to all fasteners which do not have a specific requirement identified in this Service Manual. The following factors shall be considered when applying torque: cleanliness of the fastener, use of a thread sealant (e.g.
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Standard Torque for Dry, Zinc Plated and Steel Fasteners (Inch Series) Thread Size # 6 -- 32 UNC Grade 1, 5 & 8 with Thin Height Nuts SAE Grade 1 Bolts, Screws, Studs & Sems with Regular Height Nuts (SAE J995 Grade 2 or Stronger Nuts) in--lb in--lb N--cm 10 + 2 13 + 2 147 + 23 # 6 -- 40 UNF # 8 -- 32 UNC 13 + 2 25 + 5 282 + 30 # 8 -- 36 UNF # 10 -- 24 UNC 18 + 2 30 + 5 339 + 56 # 10 -- 32 UNF SAE Grade 5 Bolts, Screws, Studs & Sems with Regular Height Nuts (SAE J995 Grade 2 or Stronger N
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Standard Torque for Dry, Zinc Plated and Steel Fasteners (Metric Fasteners) Class 8.8 Bolts, Screws and Studs with Regular Height Nuts (Class 8 or Stronger Nuts) Class 10.9 Bolts, Screws and Studs with Regular Height Nuts (Class 10 or Stronger Nuts) M5 X 0.8 57 + 5 in--lb 640 + 60 N--cm 78 + 7 in--lb 885 + 80 N--cm M6 X 1.0 96 + 9 in--lb 1018 + 100 N--cm 133 + 13 in--lb 1500 + 150 N--cm M8 X 1.25 19 + 2 ft--lb 26 + 3 N--m 27 + 2 ft--lb 36 + 3 N--m M10 X 1.
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Other Torque Specifications SAE Grade 8 Steel Set Screws Wheel Bolts and Lug Nuts Thread Size Recommended Torque Thread Size Square Head Hex Socket 1/4 -- 20 UNC 140 + 20 in--lb 73 + 12 in--lb 5/16 -- 18 UNC 215 + 35 in--lb 145 + 20 in--lb 3/8 -- 16 UNC 35 + 10 ft--lb 18 + 3 ft--lb 1/2 -- 13 UNC 75 + 15 ft--lb 50 + 10 ft--lb Recommended Torque** 7/16 -- 20 UNF Grade 5 65 + 10 ft--lb 88 + 14 N--m 1/2 -- 20 UNF Grade 5 80 + 10 ft--lb 108 + 14 N--m M12 X 1.25 Class 8.
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Chapter 3 Chassis Table of Contents Chassis GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . 1 Operator’s Manual . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SERVICE AND REPAIRS . . . . . . . . . . . . . . . . . . . . . . 2 Roller (ProCore SR54, SR54--S, SR70 and SR70--S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Roller (ProCore SR48 and SR72) . . . . . . . . . . . . . 4 Roller (ProCore SR75) . . . . . . . . . . . . . . . . . . . . . . . 6 PTO Driveshaft . . . . .
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Service and Repairs Roller (ProCore SR54, SR54--S, SR70 and SR70--S) PROCORE SR54 SHOWN 7 6 5 8 9 3 2 1 10 11 12 13 14 ANTISEIZE LUBRICANT 4 FRONT RIGHT ANTISEIZE LUBRICANT Figure 1 1. 2. 3. 4. 5. Aerator frame Flange bearing (2 used) Lock nut (2 used per bearing) Roller Single roller boot (2 used) 6. 7. 8. 9. 10.
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4. Loosen two (2) set screws that secure each bearing locking collar to roller shaft (Fig. 3). NOTE: On ProCore SR54--S and SR70--S aerators, the rear roller scraper is secured to the frame with cap screws that also secure the rear roller flange bearings. When removing the rear roller on these aerators, the roller scraper will be removed as well. 5. Remove cap screws and lock nuts that secure both flange bearings (item 2) to aerator frame. 6. Start engine on tractor.
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Roller (ProCore SR48 and SR72) PROCORE SR72 SHOWN 1 4 2 4 6 ANTISEIZE LUBRICANT 9 8 7 6 3 ANTISEIZE LUBRICANT 5 FRONT RIGHT Figure 4 1. Aerator frame 2. Scraper 3. Roller 4. Cap screw 5. Flange bearing (2 used) 6. Lock nut NOTE: The roller used on the ProCore SR48 and SR72 are very similar. The procedure for removal and installation of the roller is the same for both models. The ProCore SR72 is shown in Figure 4. Roller Removal (Fig. 4) 1.
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NOTE: Drop speed can be adjusted on the tractor. Refer to the Tractor Operator’s Manual for additional information. To prevent personal injury, make sure that roller is supported as it is removed from the machine. 4. Start engine on tractor. Slowly lower aerator to position aerator frame to roller assembly. Stop tractor engine and remove key from the ignition switch. 7. Remove roller with vertical roller bars and flange bearings from under machine. 5.
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Roller (ProCore SR75) FRONT RIGHT 1 2 3 5 ANTISEIZE LUBRICANT ANTISEIZE LUBRICANT 4 Figure 6 1. Aerator frame 2. Roller 3. Cap screw (4 used per bearing) 4. Flange bearing (2 used) Roller Removal (Fig. 6) 1. Position aerator on a firm, level surface with aerator attached to tractor. Disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 6. Start engine on tractor. Slowly raise aerator while allowing roller assembly to remain on the ground.
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8. Slide flange bearings from roller shaft ends. 2 Roller Installation (Fig. 6) 4 3 1. Clean roller shaft ends and apply antiseize lubricant to shaft ends. Slide flange bearing onto roller shaft ends. Do not tighten set screws in bearings at this time. Loctite #242 1 CAUTION To prevent personal injury, make sure that roller is supported as it is installed to the machine. 2. Position roller with flange bearings under raised aerator. Figure 7 1. Bearing 2. Bearing housing (4 bolt) 3.
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PTO Driveshaft FRONT PROCORE SR54 SHOWN RIGHT 1 2 3 4 5 6 7 Figure 8 1. Gearbox 2. Driveshaft shield access panel 3. PTO driveshaft shield 4. Flat washer (4 used) 5. Lock washer (4 used) 4. Separate PTO driveshaft from tractor PTO shaft (Fig. 9): CAUTION The friction clutch on the PTO driveshaft may become hot during use. To prevent personal injury, make sure that clutch has cooled before performing any service on the driveshaft. Removal (Fig. 8) A.
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Installation (Fig. 8) 1. Apply grease to gearbox input shaft and tractor output shaft. 2 2. Position PTO driveshaft with clutch end toward aerator gearbox. 1 3. Secure PTO driveshaft coupler to gearbox input shaft (Fig. 10): 3 A. Align splines of driveshaft coupler with gearbox input shaft and slide coupler onto shaft. B. Secure driveshaft coupler to gearbox input shaft with pin and nut. Figure 9 C. Close and secure driveshaft shield access panel. 1. Driveshaft 2. Tractor PTO shaft 3.
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PTO Driveshaft Clutch Service PROCORE SR72 SHOWN 19 18 24 20 21 8 8 11 13 26 10 2 3 16 12 23 4 24 25 1 15 4 5 9 7 5 22 14 6 17 Figure 11 1. 2. 3. 4. 5. 6. 7. 8. 9. Lock nut Inner tube yoke Inner tube PTO clutch lining Pressure plate PTO pressure plate Driving plate Safety chain Flange yoke 10. 11. 12. 13. 14. 15. 16. 17. 18.
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Clutch Disassembly (Fig. 11) PROCORE SR54 SHOWN 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 2 2 2. Remove PTO driveshaft from aerator (see PTO Driveshaft Removal in this section). 4 3. Remove eight (8) cap screws (item 17), nuts (item 25) and springs (item 15) that secure clutch assembly to driveshaft flange yoke. 3 4.
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PTO Driveshaft Cross and Bearing Service 1. Remove PTO driveshaft from aerator (see PTO Driveshaft Removal in this section). D. Hold cross in alignment and press bearing in until it hits the yoke. 2. If necessary, separate PTO driveshaft and remove shields. E. Carefully place second bearing into yoke bore and onto cross shaft. Press bearing into yoke. IMPORTANT: When placing yoke in vise, clamp lightly on the solid part of the yoke to prevent yoke damage.
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Hydraulic Top Link 18 16 2 3 20 5 16 6 1 17 7 Chassis 19 2 8 11 4 13 9 10 12 14 For machine serial numbers below 320000000 15 Figure 15 1. 2. 3. 4. 5. 6. 7. Shaft Cap screw (2 used) Retainer plate Retaining ring Wiper Head Back--up ring 8. 9. 10. 11. 12. 13. 14. O--ring Back--up ring O--ring Back--up ring O--ring Piston O--ring Disassembly (Fig. 15) 1. Remove hydraulic top link from aerator and tractor (Fig. 17). 2.
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13 14 12 11 10 9 9 7 8 6 5 4 3 2 1 For machine serial numbers above 320000000 Figure 16 1. 2. 3. 4. 5. Shaft Head Dust seal Seal Dual seal 6. 7. 8. 9. 10. Wear ring Piston O--ring Seal Lock nut 5. Remove retaining ring from groove in barrel. 11. 12. 13. 14. Barrel Pin Cotter pin Clevis Inspection 6. Extract shaft, head and piston assembly by carefully twisting and pulling on the shaft. IMPORTANT: Do not clamp vise jaws against the shaft surface. Clamp on the shaft clevis ONLY.
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3. Inspect head, shaft and piston for excessive pitting, scoring and wear. Replace any worn or damaged parts. 8 FRONT Assembly (Fig. 15) 9 1. Make sure all hydraulic cylinder parts are clean before assembly. 2. Coat new O--rings, back--up rings and wiper with clean hydraulic oil. Carefully install new back--up rings, O--rings and wiper to head and piston. 1 IMPORTANT: Do not clamp vise jaws against the shaft surface. Clamp on the shaft clevis ONLY. 5 3.
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Covers (ProCore SR54, SR54--S, SR70 and SR70--S) 3 PROCORE SR54 SHOWN 1 2 9 16 13 6 8 14 3 12 11 10 12 12 13 15 10 FRONT 11 4 7 12 5 RIGHT Figure 18 1. 2. 3. 4. 5. 6. Rear hood Cap screw (2 used) Latch (2 used) Cap screw (4 used) RH screen LH screen 7. 8. 9. 10. 11. Lock washer (6 used) Foam strip (2 used) Spacer (2 used per screen) Cap screw (4 used) Screen clip (2 used) 12. 13. 14. 15. 16.
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Removal (Fig. 18) Installation (Fig. 18) 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 1. Make sure that screen clip (item 11) is loosely attached to frame. 2. To install front screen (item 5 or 6): A. Position front screen to machine. A. Unlatch rear hood. B. Remove two (2) cap screws (item 2) that secure rear hood to frame. C. Remove rear hood from machine. 3.
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Covers (ProCore SR48 and SR72) PROCORE SR72 SHOWN 5 4 1 12 11 13 15 15 9 14 10 8 9 15 9 6 14 6 12 16 7 16 14 3 8 FRONT 7 2 RIGHT Figure 19 1. 2. 3. 4. 5. 6. Rear hood RH screen LH screen Foam strip (2 used) Spacer (4 used) Top screen clip (2 used) 7. 8. 9. 10. 11. Front screen bracket (2 used) Cap screw (8 used) Cap screw (8 used) Socket head screw (4 used) Lock nut (4 used) 12. 13. 14. 15. 16.
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Removal (Fig. 19) Installation (Fig. 19) 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 1. If removed, secure top screen clip (item 6) and front screen bracket (item 7) to front screen. 2. To install front screen (item 2 or 3): A. Position front screen to machine. A. Unlatch rear hood. B. Remove two (2) cap screws (item 13) that secure rear hood to frame. C.
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Covers (ProCore SR75) 5 6 1 3 6 12 5 2 4 5 6 6 5 10 5 6 8 5 11 FRONT 5 10 RIGHT 6 5 5 7 5 6 9 6 11 Figure 20 1. 2. 3. 4. Rear hood Cap screw (2 used) LH end cover LH front screen 5. 6. 7. 8. Lock washer (38 used) Cap screw (36 used) RH front screen RH end cover 9. 10. 11. 12. Window plate (2 used) Spacer (2 used) Hex nut (2 used) Latch assembly (2 used) Removal (Fig. 20) Installation (Fig. 20) 1. Position aerator on a firm, level surface.
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Chapter 4 Coring Head (SR54 & SR70) Table of Contents Coring Head (SR54 & SR70) SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . 4 Coring Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Coring Head Adjustments . . . . . . . . . . . . . . . . . . . . 6 SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 SERVICE AND REPAIRS . . . . . . . . . . . . . . . . . . . . . .
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Specifications Item Description ProCore SR54 Aerating Width Number of Connecting Rods Number of Rollers Depth Adjustment Gearbox Lubricant Gearbox Lubricant Capacity Gearbox Weight (approximate) 54 inches (1.37 meters) 6 1 Hydraulic Top Link SAE 80W--90 gear lube 2 US quart (1.9 liter) 80 lbs (36 kg) ProCore SR54--S Aerating Width Number of Connecting Rods Number of Rollers Depth Adjustment Gearbox Lubricant Gearbox Lubricant Capacity Gearbox Weight (approximate) 54 inches (1.
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General Information Coring Head PROCORE SR54 CORING HEAD 4 6 8 6 7 2 1 5 3 PROCORE SR70 CORING HEAD 6 4 1 6 8 2 7 5 3 Figure 1 1. Aerator frame 2. Coring crankshaft assembly 3. Tine holder Coring Head (SR54 & SR70) 4. Connecting rod 5. Linkage arm assembly 6. Drive chain sprocket Page 4 -- 4 7. Crank arm 8.
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The coring head of a ProCore SR deep tine aerator consists of the aerator frame, a coring crankshaft assembly, tine holders and aerating tines. The rotating crankshaft assembly operates a number of connecting rods with linkage arm assemblies to provide effective tine motion for deep turf aeration. The SR54 and SR70 aerator frames pivot on a single roller to allow aerating depth control. The SR54--S and SR70--S aerators are equipped with dual rollers.
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Coring Head Adjustments See Operator’s Manual for adjustment procedures for the coring head on your ProCore SR series aerator. CAUTION Never work on the aerator with the tow tractor PTO engaged or engine running. Always disengage the PTO, stop tractor engine, remove key from the ignition switch and wait for all machine movement to stop before performing any service to aerator components.
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Special Tools Order special tools from your Toro Distributor. Crankshaft Nut Wrench Use to remove and install the hex nuts that secure coring head crankshaft crank arms and connecting rods. Toro Part Number: SG885300 2” hex 3” hex Figure 2 Use to protect threads of crankshaft components during assembly of crankshaft, connecting rods and linkage arms. The bullet tool should be installed onto the threads of the crankpin or linkage arm fastener to prevent thread damage when component is installed.
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Service and Repairs Linkage Arm Assemblies FRONT PROCORE SR54 SHOWN RIGHT ANTISEIZE LUBRICANT 1 ANTISEIZE LUBRICANT 3 9 2 2 3 4 17 16 8 15 18 13 8 6 20 5 21 22 7 14 28 4 14 6 265 ft--lb (359 N--m) 7 13 12 11 10 23 22 27 24 25 19 26 Figure 5 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Cap screw Outer bushing Cap screw Linkage arm Cap screw Outer bushing Ball bearing Outer bushing Connecting rod Linkage spacer Coring Head (SR54 & SR70) 11. 12. 13. 14. 15. 16. 17. 18. 19.
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NOTE: The linkage arm assemblies for ProCore SR54 and SR70 aerators are very similar. The ProCore SR54 linkage arm assembly is shown in Figure 5. The tine head assembly used on ProCore SR54--S and SR70--S is shown in Figure 6. 16 1 2 3 Disassembly (Fig. 5) 4 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 14 12 3 5 15 6 7 8 16 2.
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Connecting Rods PROCORE SR54 SHOWN 1 FRONT RIGHT 14 ANTISEIZE LUBRICANT 2 950 ft--lb (1288 N--m) 3 4 5 5 13 12 4 3 11 6 7 265 ft--lb (359 N--m) 6 7 8 10 9 8 Figure 8 1. 2. 3. 4. 5. Crank pin Cap screw Outer bushing Retaining ring Ball bearing 6. 7. 8. 9. 10. Outer bushing Ball bearing Retaining ring Connecting rod Bearing spacer IMPORTANT: Before disassembling the coring crankshaft, label location and orientation of components that are to be removed.
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B. Press a new bearing into one side of the connecting rod bore until the bearing contacts installed retaining ring. Then press second new bearing into bore so that it contacts first bearing. As crankshaft components are removed from machine, the crankshaft will become out of balance and may rotate quickly, creating pinch points and potential for personal injury. Be cautious when disassembling the coring crankshaft.
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Coring Crankshaft (SR54) PROCORE SR54 CORING CRANKSHAFT (VIEWED FROM REAR) 3 3 4 3 4 1 2 3 3 1 4 2 Figure 9 1. Crank arm (2 used) 2. Crank arm (2 used) 3. Crank arm (5 used) 4. Crank arm (3 used) The ProCore SR54 coring crankshaft uses four (4) different crank arms. For identification purposes, the crank arms and crankshaft timing are shown in Figure 9. Refer to your Parts Catalog to identify part numbers for crankshaft components.
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Coring Crankshaft (SR70) PROCORE SR70 CORING CRANKSHAFT (VIEWED FROM REAR) 2 2 2 2 2 2 3 1 1 2 2 Figure 10 1. Crank arm (2 used) 2. Crank arm (13 used) 3. Crank arm (1 used) ProCore SR Series Page 4 -- 13 Coring Head (SR54 & SR70) The ProCore SR70 coring crankshaft uses three (3) different crank arms. For identification purposes, the crank arms and crankshaft timing are shown in Figure 10. Refer to your Parts Catalog to identify part numbers for crankshaft components.
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Coring Crankshaft Bearing Housings FRONT ANTISEIZE LUBRICANT 950 ft--lb (1288 N--m) RIGHT 950 ft--lb (1288 N--m) 2 3 4 3 1 12 5 15 5 7 14 6 8 5 10 7 11 9 950 ft--lb (1288 N--m) 9 12 3 5 13 ANTISEIZE LUBRICANT 3 2 ANTISEIZE LUBRICANT 950 ft--lb (1288 N--m) 4 PROCORE SR54 SHOWN Figure 11 1. 2. 3. 4. 5. Lock nut Crank pin Outer bushing Connecting rod assembly Hex nut 6. 7. 8. 9. 10.
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Removal (Fig. 11) 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 2. Unlatch, open and support back cover to allow access to coring crankshaft. 3. If bearing housing with drive chain attached is to be removed, remove coring head drive chain (see Coring Head Drive Chain Removal in this section).
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3. Install components to bearing housing assembly: A. If a removed crank arm included a drive sprocket, install sprocket if it was removed (Fig. 12). B. If both crank arms were removed from crank shaft, use notes made during disassembly to properly orientate one of the crank arms (items 6 or 13) and slide onto crank shaft. Install hex nut onto crank shaft threads to secure crank arm to crank shaft. C. Apply antiseize lubricant liberally to crank shaft (item 11).
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Coring Head Drive Chain PROCORE SR54 SHOWN 5 4 6 7 3 1 8 2 13 12 7 1 9 10 13 5 9 2 11 4 10 3 FRONT RIGHT 8 7 Figure 13 1. 2. 3. 4. 5. Cap screw Cap screw Idler sprocket Offset spacer Lock nut 6. 7. 8. 9. LH idler bracket Lock nut Idler rod Drive chain NOTE: The coring head drive chain assemblies for ProCore SR54 and SR70 aerators are very similar. The ProCore SR54 is shown in Figure 13. Disassembly (Fig. 13) 1. Position aerator on a firm, level surface.
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8. If sprocket removal from coring crankshaft is necessary, remove coring crankshaft bearing housing that includes sprocket and remove sprocket from crank arm (see Coring Crankshaft Bearing Housing Removal in this section). Assembly (Fig. 13) 1. If coring crankshaft sprocket was removed, secure sprocket to crank arm and install coring crankshaft bearing housing (see Coring Crankshaft Bearing Housing Installation in this section). 2.
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Coring Head Drive Sprockets PROCORE SR54 SHOWN 5 4 6 7 3 1 8 2 15 11 10 9 14 7 1 12 13 20 5 19 18 2 21 4 8 16 17 3 FRONT 7 RIGHT Figure 15 1. 2. 3. 4. 5. 6. 7. Cap screw Cap screw Idler sprocket (2 used) Offset spacer Lock nut LH idler bracket Lock nut 8. 9. 10. 11. 12. 13. 14. Idler rod Cap screw (3 used per hub) Lock washer (3 used per hub) Set screw Sprocket hub (2 used) Gearbox sprocket (2 used) Square key (2 used) 15. 16. 17. 18. 19. 20. 21.
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1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 2. Raise and support rear hood. 3. Remove front screens (see Covers Removal in the Service and Repairs section of Chapter 3 -- Chassis). 4. Remove drive chains (see Coring Head Drive Chain Disassembly in this section). 5. Remove sprocket(s) from gearbox shaft: A.
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Gearbox PROCORE SR54 SHOWN 5 4 6 7 3 1 8 2 15 11 10 9 14 7 1 12 13 16 17 18 23 5 22 21 2 24 4 8 19 20 3 FRONT 7 RIGHT Figure 17 1. 2. 3. 4. 5. 6. 7. 8. Cap screw Cap screw Idler sprocket (2 used) Offset spacer Lock nut LH idler bracket Lock nut Idler rod 9. 10. 11. 12. 13. 14. 15. 16. Cap screw (3 used per hub) Lock washer (3 used per hub) Set screw Sprocket hub (2 used) Gearbox sprocket (2 used) Square key (2 used) Gearbox Flat washer (4 used) 17. 18. 19. 20. 21. 22. 23. 24.
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Gearbox Removal (Fig. 17) 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. PROCORE SR70 FRONT 2. Remove screens from aerator frame (see Covers Removal in the Service and Repairs section of Chapter 3 -- Chassis). 2 1 3. Drain lubricant from gearbox. 4.
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Gearbox Installation (Fig. 17) IMPORTANT: If a gearbox is incorrectly assembled or installed (e.g. output shaft installed into gearbox in reverse direction or gearbox placed on frame upside down), there is a possibility that gearbox output shaft rotation will be incorrect for proper aerator operation. After placing the gearbox on the frame, make sure that rotation of the input shaft results in the correct output shaft rotation direction.
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Chapter 5 Coring Head (SR48 & SR72) Table of Contents Coring Head (SR48 & SR72) SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . 4 Coring Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Coring Head Adjustments . . . . . . . . . . . . . . . . . . . . 5 SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SERVICE AND REPAIRS . . . . . . . . . . . . . . . . . . . . . .
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Specifications Item Description ProCore SR48 Aerating Width Number of Connecting Rods Number of Rollers Depth Adjustment Gearbox Lubricant Gearbox Lubricant Capacity Gearbox Weight (approximate) 48 inches (1.22 meters) 4 1 Hydraulic Top Link SAE 80W--90 gear lube 2 US quarts (1.9 liters) 109 lbs (50 kg) ProCore SR72 Aerating Width Number of Connecting Rods Number of Rollers Depth Adjustment Gearbox Lubricant Gearbox Lubricant Capacity Gearbox Weight (approximate) 72 inches (1.
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Coring Head (SR48 & SR72) This page is intentionally blank.
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General Information Coring Head PROCORE SR72 CORING HEAD SHOWN 4 8 6 6 2 7 1 5 3 Figure 1 1. Aerator frame 2. Coring crankshaft assembly 3. Tine holder 4. Connecting rod 5. Linkage arm assembly 6. Drive chain sprocket The coring head of a ProCore SR deep tine aerator consists of the aerator frame, a coring crankshaft assembly, tine holders and aerating tines.
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Coring Head Adjustments See Operator’s Manual for adjustment procedures for the coring head on your ProCore SR series aerator. CAUTION Coring Head (SR48 & SR72) Never work on the aerator with the tow tractor PTO engaged or engine running. Always disengage the PTO, stop tractor engine, remove key from the ignition switch and wait for all machine movement to stop before performing any service to aerator components.
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Special Tools Order special tools from your Toro Distributor. Crankshaft Nut Wrench This three (3) foot long wrench can be used to loosen and remove the fasteners that secure coring head crankshaft crank arms and connecting rods. 2” hex Toro Part Number: SG885300 3” hex Figure 2 Bullet Tools Use to protect threads of crankshaft components during assembly of crankshaft, connecting rods and linkage arms.
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Service and Repairs Linkage Arm Assemblies PROCORE SR72 SHOWN FRONT RIGHT 300 ft--lb (407 N--m) ANTISEIZE LUBRICANT 6 7 10 9 8 7 5 1 2 4 3 12 24 13 11 3 300 ft--lb (407 N--m) 7 14 23 3 15 3 8 ANTISEIZE LUBRICANT 16 9 22 21 7 11 20 19 16 18 17 300 ft--lb (407 N--m) 13 Figure 5 1. 2. 3. 4. 5. 6. 7. 8. Cap screw Flat washer Outer bushing Linkage arm spacer Wrist pin Connecting rod assembly Flange nut Rear spring post 9. 10. 11. 12. 13. 14. 15. 16.
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Disassembly (Fig. 5) 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 4. Make sure that spring wires are not broken or crossed (Fig. 8). Install both spring assemblies to rear spring post (item 8) and front spring holder (item 16). 5 1 CAUTION 3 2 Be careful when removing the spring assembly. The spring is under load and may cause personal injury during removal. 2 5 3 4 2.
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Connecting Rods PROCORE SR72 SHOWN FRONT RIGHT 300 ft--lb (407 N--m) ANTISEIZE LUBRICANT 15 14 7 11 12 13 16 12 11 10 8 6 4 950 ft--lb (1288 N--m) 5 ANTISEIZE LUBRICANT 3 9 1 4 5 3 2 6 300 ft--lb (407 N--m) 7 Figure 9 1. 2. 3. 4. 5. 6. Connecting rod Spacer Retaining ring Bearing Outer bushing Linkage arm 7. 8. 9. 10. 11.
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Removal (Fig. 9) B. Insert bearing spacer into rod bore. 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. C. Press ball bearings into connecting rod bore until the bearings contact installed retaining rings. 3. Rotate coring crankshaft to allow access to crank pin (item 15) and hex nut (item 8) for connecting rod that is to be removed. 4.
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Coring Crankshaft (SR48) PROCORE SR48 CORING CRANKSHAFT (VIEWED FROM REAR) 2 3 3 1 1 2 Figure 10 1. Crank arm (2 used) 2. Crank arm (2 used) 3. Crank arm (4 used) The ProCore SR48 coring crankshaft uses three (3) different crank arms. For identification purposes, the crank arms and crankshaft timing are shown in Figure 10. Refer to your Parts Catalog to identify part numbers for crankshaft components.
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Coring Crankshaft (SR72) PROCORE SR72 CORING CRANKSHAFT (VIEWED FROM REAR) 3 2 4 4 1 2 1 2 3 5 5 Figure 11 3. Crank arm (2 used) 4. Crank arm (2 used) 5. Crank arm (3 used) Coring Head (SR48 & SR72) 1. Crank arm (2 used) 2. Crank arm (3 used) The ProCore SR72 coring crankshaft uses five (5) different crank arms. For identification purposes, the crank arms and crankshaft timing are shown in Figure 11. Refer to your Parts Catalog to identify part numbers for crankshaft components.
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Coring Crankshaft Bearing Housings FRONT 1200 ft--lb (1627 N--m) RIGHT 14 7 6 1 5 10 9 13 12 11 10 9 3 2 1200 ft--lb (1627 N--m) 3 4 2 15 950 ft--lb (1288 N--m) 5 8 6 950 ft--lb (1288 N--m) 7 ANTISEIZE LUBRICANT PROCORE SR72 SHOWN ANTISEIZE LUBRICANT Figure 12 1. 2. 3. 4. 5. Lock nut Hex nut Clipped washer Crank arm Dowel pin bullets 6. 7. 8. 9. 10.
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Removal (Fig. 12) 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. E. If sprocket is attached to the removed crank arm, remove spacer from both sides of bearing housing (Fig. 13). F. If sprocket is attached to removed crank arm, remove sprocket if necessary (Fig. 14). 2. Unlatch, open and support back cover to allow access to coring crankshaft. G.
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Installation (Fig. 12) 2 1 1. If bearing was removed from bearing housing, install new bearing into housing (Fig. 15): 3 A. Install a retaining ring into one of the grooves in bearing housing. Make sure that retaining ring is properly seated in groove. 4 B. Position bearing to bearing housing so bearing flange orientation is correct. Install new bearing into bearing housing by pressing on outer race of bearing. 3 C. Install second retaining ring into bearing housing groove to secure bearing.
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Coring Head Drive Chain PROCORE SR72 SHOWN 13 FLAT 12 4 1 3 10 2 6 12 16 5 2 6 7 9 24 1 3 4 5 8 11 17 17 16 7 19 24 14 9 25 14 25 19 14 14 15 20 23 22 21 FRONT 18 RIGHT Figure 16 1. 2. 3. 4. 5. 6. 7. 8. 9. Idler shaft Master link assembly Jam nut (grooved) Jam nut Idler sprocket Lock nut Sprocket hub (2 used) Cap screw (4 used) Sprocket (2 used) 10. 11. 12. 13. 14. 15. 16. 17.
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7. If sprocket removal from coring crankshaft is necessary, remove coring crankshaft bearing housing that includes sprocket and remove sprocket from crank arm (see Coring Crankshaft Bearing Housing Removal in this section). 8. If necessary, remove idler assembly using Figure 16 as a guide. Assembly (Fig. 16) 1. If coring crankshaft sprocket was removed, secure sprocket to crank arm and install coring crankshaft bearing housing (see Coring Crankshaft Bearing Housing Installation in this section).
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Coring Head Drive Sprockets PROCORE SR72 SHOWN 13 FLAT 12 4 1 3 10 2 6 12 16 5 2 6 7 9 24 1 3 4 5 8 11 17 17 16 7 19 24 14 9 25 14 25 19 14 14 15 20 23 22 FRONT 21 18 RIGHT Figure 18 1. 2. 3. 4. 5. 6. 7. 8. 9. Idler shaft Master link assembly (2 used) Jam nut (grooved) Jam nut Idler sprocket Lock nut Sprocket hub (2 used) Cap screw (4 used) Sprocket (2 used) 10. 11. 12. 13. 14. 15. 16. 17.
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1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 2. Raise and support rear hood. 3. Remove front screens (see Covers Removal in the Service and Repairs section of Chapter 3 -- Chassis). 4. Remove drive chains (see Coring Head Drive Chain Disassembly in this section). 5. Remove sprocket(s) from gearbox shaft: A.
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Gearbox PROCORE SR72 SHOWN 13 12 2 4 1 3 10 2 6 16 1 3 4 5 8 11 17 12 5 17 16 7 19 24 14 9 6 7 9 25 14 25 14 14 24 19 15 20 23 22 FRONT 21 18 RIGHT Figure 20 1. 2. 3. 4. 5. 6. 7. 8. 9. Idler shaft Master link assembly (2 used) Jam nut (grooved) Jam nut Idler sprocket Lock nut Sprocket hub (2 used) Cap screw (4 used) Sprocket (2 used) 10. 11. 12. 13. 14. 15. 16. 17.
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2. Install and tighten ten (10) saddle bolts (item 10) and lock nuts (item 13) to frame and gearbox flanges. 6. Remove drive chains from gearbox sprockets (see Coring Head Drive Chain Disassembly in this section). 3. Install sprocket and sprocket hub to both gearbox output shafts (see Coring Head Drive Sprockets Assembly in this section). 7. Remove drive sprocket and sprocket hub from both gearbox output shafts (see Coring Head Drive Sprockets Disassembly in this section). 4.
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Chapter 6 Coring Head (SR75) Table of Contents Coring Head (SR75) SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . 4 Coring Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Coring Head Adjustments . . . . . . . . . . . . . . . . . . . . 5 SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SERVICE AND REPAIRS . . . . . . . . . . . . . . . . . . . . . .
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Specifications Item Description ProCore SR75 Aerating Width Number of Connecting Rods Number of Rollers Depth Adjustment Gearbox Lubricant Gearbox Lubricant Capacity Gearbox Weight Coring Head (SR75) 78 inches (1.98 meters) 6 1 Hydraulic Top Link SAE 80W--90 gear lube 4 US quarts (3.
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General Information Coring Head 1 8 6 6 2 4 7 5 3 Figure 1 1. Aerator frame 2. Coring crankshaft assembly 3. Tine holder 4. Connecting rod 5. Linkage arm assembly 6. Drive chain sprocket The coring head of a ProCore SR75 deep tine aerator consists of the aerator frame, a coring crankshaft assembly, tine holders and aerating tines. The rotating crankshaft assembly operates six (6) connecting rods with linkage arm assemblies to provide effective tine motion for deep turf aeration.
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Coring Head Adjustments See Operator’s Manual for adjustment procedures for the coring head on your ProCore SR series aerator. CAUTION Coring Head (SR75) Never work on the aerator with the tow tractor PTO engaged or engine running. Always disengage the PTO, stop tractor engine, remove key from the ignition switch and wait for all machine movement to stop before performing any service to aerator components.
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Special Tools Order special tools from your Toro Distributor. Crankshaft Nut Wrench This three (3) foot long wrench can be used to loosen and remove the fasteners that secure coring head crankshaft crank arms and connecting rods. 2” hex Toro Part Number: SG885300 3” hex Figure 2 Bullet Tools Use to protect threads of crankshaft components during assembly of crankshaft, connecting rods and linkage arms.
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Service and Repairs Linkage Arm Assemblies ANTISEIZE LUBRICANT 800 ft--lb (1085 N--m) 1 3 2 3 6 9 5 2 11 2 3 4 ANTISEIZE LUBRICANT 8 7 3 800 ft--lb (1085 N--m) 800 ft--lb (1085 N--m) 17 10 15 12 FRONT 13 RIGHT 800 ft--lb (1085 N--m) 4 16 14 Figure 5 1. 2. 3. 4. 5. 6. Cap screw Wrist pin Lock nut Boss nut Hinge assembly Connecting rod assembly 7. 8. 9. 10. 11. 12. Camber bracket Rear spring post Cap screw Cap screw Linkage arm Bumper pad 13. 14. 15. 16. 17.
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2. Remove both spring assemblies from rear spring post (item 8) and front spring holder (item 16). 1 3. Remove linkage arm components as needed using Figure 5 as a guide. 2 2 4 4. If necessary, disassemble tine head assembly using Figure 6 as a guide. 4 3 3 5 5. If necessary, disassemble hinge assembly using Figure 7 as a guide. 6. Discard all removed bearings. 6 5 Assembly (Fig. 5) A. Install one (1) retaining ring into groove in bore. Make sure that retaining ring is properly seated in groove.
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Connecting Rods FRONT RIGHT ANTISEIZE LUBRICANT 1200 ft--lb (1627 N--m) 14 8 7 800 ft--lb (1085 N--m) 5 16 2 13 3 10 13 4 2 ANTISEIZE LUBRICANT 800 ft--lb (1085 N--m) 15 5 3 9 6 12 9 1 6 11 ANTISEIZE LUBRICANT 12 16 Figure 9 1. 2. 3. 4. 5. 6. Connecting rod Dowel pin Retaining ring (2 per connecting rod) Bearing (4 per connecting rod) Outer bushing (2 per connecting rod) Linkage arm 7. 8. 9. 10. 11.
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3. Rotate coring crankshaft to allow access to crank pin (item 15) and crank nut (item 8) for connecting rod to be removed. Remove cotter pin (item 7) from crank nut. IMPORTANT: When loosening crank nut (item 8) DO NOT use a pipe wrench or other adjustable wrench. Damage to the crank nut (item 8) and crank pin (item 15) may occur if adjustable wrench is used. 4. Insert block of wood between aerator frame and connecting rod to prevent the crankshaft from turning.
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Coring Crankshaft PROCORE SR75 CORING CRANKSHAFT (VIEWED FROM REAR) 2 1 2 6 3 6 1 5 1 4 4 1 1 1 3 1 1 1 Figure 10 1. Crank arm (10 used) 2. Crank arm (2 used) 3. End crank shaft (2 used) 4. RH crank shaft (2 used) 5. Center crank shaft 6. LH crank shaft (2 used) The ProCore SR75 coring crankshaft uses two (2) different crank arms and four (4) different crank shafts. For identification purposes, the crank arms, crank shafts and crankshaft timing are shown in Figure 10.
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Coring Crankshaft Bearing Housings FRONT ANTISEIZE LUBRICANT 2 RIGHT 1200 ft--lb (1627 N--m) ANTISEIZE LUBRICANT 4 9 8 3 10 11 7 5 3 12 5 9 3 9 3 7 9 6 1 5 13 1200 ft--lb (1627 N--m) 5 14 1200 ft--lb (1627 N--m) ANTISEIZE LUBRICANT 6 Figure 11 1. 2. 3. 4. 5. Cap screw (2 per bearing housing) Lock nut (2 per bearing housing) Cotter pin Crank arm Dowel pin 6. 7. 8. 9. 10.
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Removal (Fig. 11) D. Slide crank arm from crank shaft. 1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. E. If sprocket is attached to removed crank arm, remove sprocket if necessary (Fig. 12). F. Slide crank shaft with attached crank arm from bearing housing assembly. 2. Unlatch, open and support back cover to allow access to coring crankshaft. G.
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Installation (Fig. 11) 1. If bearings were removed from bearing housing, install new bearings into housing (Fig. 13): A. Install one (1) retaining ring into groove in bore of housing. Make sure that retaining ring is properly seated in groove. B. Press a new bearing into the housing bore until the bearing contacts the installed retaining ring. C. Press second bearing into bore so that it contacts previously installed bearing. D. Install second retaining ring into groove in housing bore.
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Coring Head Drive Chain 10 11 17 18 8 3 10 1 13 7 2 19 4 9 3 10 6 14 16 12 15 5 FRONT RIGHT 10 Figure 14 1. 2. 3. 4. 5. 6. 7. Idler bolt (2 used) Master link assembly (2 used) Grooved washer (2 used) Jam nut (2 used) Idler sprocket (2 used) Lock nut (2 used) Sprocket hub (2 used) 8. 9. 10. 11. 12. 13. Jam nut (2 used) Sprocket (2 used) Saddle bolt (16 used) Jam rod (2 used) Drive chain (2 used) Lock nut (16 used) Disassembly (Fig. 14) 1. Position aerator on a firm, level surface.
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Assembly (Fig. 14) 1. If coring crankshaft sprocket was removed, secure sprocket to crank arm and install coring crankshaft bearing housing (see Coring Crankshaft Bearing Housing Installation in this section). IMPORTANT: To prevent gearbox damage, do not overtighten drive chains. Drive chains should have 1/2” (12.7 mm) total deflection when properly adjusted. 2. If sprockets were removed from gearbox shaft, install sprockets to gearbox shaft (see Coring Head Drive Sprockets Assembly in this section). D.
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Coring Head Drive Sprockets 10 11 3 10 18 8 17 1 13 7 2 19 4 9 3 10 6 14 16 12 5 15 10 FRONT RIGHT Figure 16 1. 2. 3. 4. 5. 6. 7. Idler bolt (2 used) Master link assembly (2 used) Grooved washer (2 used) Jam nut (2 used) Idler sprocket (2 used) Lock nut (2 used) Sprocket hub (2 used) Coring Head (SR75) 8. 9. 10. 11. 12. 13. Jam nut (2 used) Sprocket (2 used) Saddle bolt (16 used) Jam rod (2 used) Drive chain (2 used) Lock nut (16 used) Page 6 -- 20 14. 15. 16. 17. 18. 19.
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1. Position aerator on a firm, level surface. If aerator is attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition switch. 2. Raise and support rear hood. 3. Remove front screens (see Covers Removal in the Service and Repairs section of Chapter 3 -- Chassis). 4. Remove drive chains (see Coring Head Drive Chain Disassembly in this section). 5. Remove sprocket(s) from gearbox shaft: A.
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Gearbox 10 11 3 10 18 8 17 1 13 7 2 19 4 3 10 6 9 14 16 12 15 5 10 20 FRONT 23 22 21 RIGHT 24 Figure 18 1. 2. 3. 4. 5. 6. 7. 8. Idler bolt (2 used) Master link assembly (2 used) Grooved washer (2 used) Jam nut (2 used) Idler sprocket (2 used) Lock nut (2 used) Sprocket hub (2 used) Jam nut (2 used) Coring Head (SR75) 9. 10. 11. 12. 13. 14. 15. 16.
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Removal (Fig. 18) 2. Remove screens from aerator frame (see Covers Removal in the Service and Repairs section of Chapter 3 -- Chassis). 3. Drain lubricant from gearbox. 4. Disconnect PTO driveshaft from gearbox input shaft (see PTO Driveshaft Removal in the Service and Repairs section of Chapter 3 -- Chassis). CAUTION To prevent personal injury, make sure that gearbox is supported as it is installed to the machine. Gearbox weighs approximately 220 pounds (100 kg). 1. Position gearbox to aerator frame.
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Chapter 7 Gearbox Service Table of Contents GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . 1 SERVICE AND REPAIRS . . . . . . . . . . . . . . . . . . . . . . 2 Gearbox (SR48, SR70 and SR70--S) . . . . . . . . . . 2 Gearbox (SR54 and SR54--S) . . . . . . . . . . . . . . . . . 6 Gearbox (SR72 and SR75) . . . . . . . . . . . . . . . . . .
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Service and Repairs Gearbox Service (SR48, SR70 and SR70--S) 16 11 3 15 7 12 8 9 15 19 16 6 19 17 17 18 2 5 20 14 22 3 2 21 20 23 4 10 13 1 Figure 1 1. 2. 3. 4. 5. 6. 7. 8. Oil seal Retaining ring Shim set (gear backlash) Shim set (input shaft endplay) Tapered bearing (cup and cone) Output shaft Relief vent Ball bearing 9. 10. 11. 12. 13. 14. 15. 16. Housing Retaining ring Bevel gear Cover plate Input shaft Plug (3 used) Ball bearing Retaining ring Gearbox Disassembly (Fig.
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F. Remove retaining ring (item 2), shim(s) (item 3) and tapered bearing cup from gearbox housing. ALIGNMENT MARK G. Discard removed bearings. 6. Use a press to remove input shaft and bearings from gearbox housing: A. Remove oil seal (item 1) from gearbox housing taking care to not damage seal bore in housing. Discard oil seal. B. Remove retaining ring (item 10) and shim(s) (item 4) from input shaft. Figure 2 2. Install new bearings and input shaft into gearbox housing: A.
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B. While preventing the input shaft from turning, rotate the bevel gear and monitor the dial indicator reading to check gearbox backlash. Allowable backlash is from 0.010” to 0.012” (0.25 to 0.30 mm). 4. Install output shaft assembly into gearbox housing: A. Press ball bearing (item 8) onto output shaft. Make sure that bearing is pressed fully to shaft shoulder.
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Gearbox Service (SR54 and SR54--S) 3 8 12 11 3 2 2 6 1 7 1 9 5 15 14 16 4 10 1 13 Figure 3 1. 2. 3. 4. 5. 6. Oil seal Retaining ring Shim set (gear backlash) Shim set (input shaft endplay) Tapered bearing (cup and cone) Output shaft 7. 8. 9. 10. 11. Relief vent Ball bearing Housing Retaining ring Bevel gear Gearbox Disassembly (Fig. 4) 1. Thoroughly clean all corrosion and burrs from output shaft and input shaft to allow easier gearbox disassembly. 2.
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2. Check and adjust input shaft bearing pre--load: A. Use a piece of string and a spring scale to determine the resistance to rotate the input shaft. Wrap the string around the input shaft and attach the spring scale to the string end. E. Press ball bearing from output shaft. F. Remove retaining ring (item 2), shim(s) (item 3) and tapered bearing cup from gearbox housing. B. Once the input shaft is rotating, the resistance to continue to rotate the shaft should be from 2 to 3 in-lbs (0.23 to 0.34 N--m).
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IMPORTANT: Correct engagement between bevel gear and input shaft gear is critical to gearbox performance and durability. D. If backlash is insufficient (less than 0.010”), move shim(s) (item 3) from tapered bearing side of gearbox to the ball bearing side of gearbox. This shim movement will move bevel gear away from the input shaft gear to increase backlash. A. Position a dial indicator at the center of a tooth on the bevel gear. E. Recheck backlash after any shim change.
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Gearbox Service (SR72 and SR75) 20 3 4 15 21 14 9 12 2 20 4 9 8 8 16 3 13 16 7 7 6 22 19 19 17 6 24 1 5 11 26 25 23 10 18 27 Figure 4 1. 2. 3. 4. 5. 6. 7. 8. 9. Gearbox housing Tapered bearing (non--gear side) Retaining ring O--ring Axle tube Bearing Oil seal O--ring Seal retainer 10. 11. 12. 13. 14. 15. 16. 17. 18.
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NOTE: Shim set (item 19) is used to adjust gearbox backlash. When removing output shaft and bearings, take note of location and number of shims to assist in assembly process. A. Remove retaining ring (item 20) and shim(s) (item 19) from side of gearbox housing opposite the bevel gear (item 21). B. Support bevel gear (item 21) to prevent it from falling. C. Press output shaft through the bevel gear to remove shaft. The gear side bearing cone (item 15) will be removed during shaft removal.
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IMPORTANT: Before installing output shaft into gearbox housing, input shaft bearing pre--load must be checked and, if necessary, adjusted. 3. Check and adjust input shaft bearing pre--load: A. Use a piece of string and a spring scale to determine the resistance to rotate the input shaft. Wrap the string around the input shaft and attach the spring scale to the string end. B. Once the input shaft is rotating, the resistance to continue to rotate the shaft should be from 2 to 3 in-lbs (0.23 to 0.34 N--m).