Service Manual
Table Of Contents
- Title Page
- Revision History
- Reader Comments
- Preface
- Table Of Contents
- 1 - Safety
- 2 - Product Records and Maintenance
- 3 - Yanmar Diesel Engine
- 4 - Hydraulic System
- Table of Contents
- Specifications
- General Information
- Hydraulic Schematics
- Hydraulic Flow Diagrams
- Special Tools
- Troubleshooting
- Testing
- Traction Circuit Charge Pressure
- Traction Circuit Relief Pressure
- Reverse Traction Circuit Reducing Valve (PR) Pressure
- Rear Traction Circuit Relief (RV) Pressure
- Piston (Traction) Pump Flow
- Cutting Deck Circuit Pressure
- Cutting Deck Circuit Relief Pressure
- Deck Motor Case Drain Leakage
- Steering Circuit Relief Pressure
- Steering Cylinder Internal Leakage
- Lift/Lower Circuit Relief Pressure
- Engine Cooling Fan Circuit
- Gear Pump Flow
- Adjustments
- Service and Repairs
- General Precautions for Removing and Installing Hydraulic System Components
- Check Hydraulic Lines and Hoses
- Priming Hydraulic Pumps
- Flush Hydraulic System
- Filtering Closed-Loop Traction Circuit
- Charge Hydraulic System
- Gear Pump
- Gear Pump Service
- Piston (Traction) Pump
- Piston (Traction) Pump Service
- Rear Traction Control Manifold
- Rear Traction Control Manifold Service
- Control Manifold Cartridge Valve Service
- HI/LOW Range Control Manifold
- Rear Axle Motor
- Front Wheel Motors
- Rear Axle and Front Wheel Motor Service
- Cutting Deck Motor
- Cutting Deck Motor Service
- Deck Control Manifold
- Deck Control Manifold Service (GM 4500-D)
- Deck Control Manifold Service (GM 4700-D)
- Steering Control Valve
- Steering Control Valve Service
- Steering Cylinder
- Steering Cylinder Service
- Engine Cooling Fan Motor
- Engine Cooling Fan Motor Service
- Fan Control Manifold
- Fan Control Manifold Service
- Lift Control Manifold
- Lift Control Manifold Service (GM 4500-D)
- Lift Control Manifold Service (GM 4700-D)
- Lift Circuit Junction Manifold
- Lift Cylinders: Decks #1, #4 and #5
- Lift Cylinders: Decks #2 and #3
- Lift Cylinders: Decks #6 and #7 (GM 4700-D)
- Lift Cylinder Service
- Hydraulic Reservoir
- Radiator and Oil Cooler Assembly
- 5 - Electrical System
- Table of Contents
- General Information
- Special Tools
- InfoCenter Display
- Troubleshooting
- Electrical System Quick Checks
- Adjustments
- Component Testing
- Ignition Switch
- Fuses
- Fusible Link Harness
- PTO Switch
- Hi/Low Speed, Engine Speed Request and Cutting Deck Lift Switches
- Headlight Switch
- Seat Switch
- Parking Brake Switch
- Cutting Deck Position Switches
- Relays with Four (4) Terminals
- Relays with Five (5) Terminals
- Traction Pedal Position Sensor
- Toro Electronic Controllers (TEC)
- Hydraulic Solenoid Valve Coils
- Piston (Traction) Pump Control Solenoid Coils
- Hydraulic Oil Temperature Sender
- Fuel Pump (Models 30873 and 30874)
- Fuel Pump (Models 30881 and 30882)
- CAN-bus Termination Resistor
- Diode Assemblies
- Resistor Assemblies
- Fan Speed Switch (Machines with Two−Post ROPS Extension Operator Fan Kit)
- Resistor Module (Machines with Two−Post ROPS Extension Operator Fan Kit)
- Service and Repairs
- 6 - Axles, Planetaries and Brakes
- Table of Contents
- Specifications
- General Information
- Adjustments
- Service and Repairs
- Brake Assembly
- Brake Inspection and Repair
- Planetary Drive Assembly
- OPH-2 Series Planetary Drive Service
- VA02 Series Planetary Drive Service
- Rear Axle Assembly
- Rear Axle Service
- Bevel Gear Case and Axle Case
- Differential Shafts
- Axle Shafts
- Input Shaft/Pinion Gear
- Differential Gear
- Pinion Gear to Ring Gear Engagement
- 7 - Chassis
- 8 - Cutting Decks
- 9 - Foldout Drawings
- Electrical Drawing Designations
- Groundsmaster 4500--D Hydraulic Schematic
- Groundsmaster 4500--D With Optional Flow Divider Kit Hydraulic Schematic
- Groundsmaster 4700--D Hydraulic Schematic
- Groundsmaster 4700--D With Optional Flow Divider Kit Hydraulic Schematic
- Electrical Schematic Groundsmaster 4500--D/4700--D Models 30881 and 30882 (Serial numbers below 315000300)
- Electrical Schematic Groundsmaster 4500--D/4700--DModels 30873 and 30874(Serial numbers below 315000300)
- Groundsmaster 4500--D/4700--D Electrical Schematic Models 30881 and 30882 (Serial Numbers 315000301 to 399999999)
- Groundsmaster 4500--D/4700--D Electrical Schematic Models 30873 and 30874 (Serial Numbers 315000301 to 399999999)
- Groundsmaster 4500--D/4700--D Electrical Schematic Models 30881 and 30882(Serial Numbers 400000000 to 403450000)
- Groundsmaster 4500--D/4700--D Electrical Schematic Models 30873 and 30874(Serial Numbers 400000000 to 403450000)
- Groundsmaster 4500--D/4700--D Electrical Schematic (Serial Numbers Serial Numbers 403450001 to 408000000)Models 30881 and 30882
- Groundsmaster 4500--D/4700--DElectrical Schematic(Serial Numbers Above 408000000)
- Groundsmaster 4500--D/4700--D Electrical Schematic (Serial Numbers Above 403450001) Models 30873 and 30874
- Electrical Schematic Groundsmaster 4500--D/4700--D Optional Operator Cab (Serial number below 399999999)
- Groundsmaster 4500--D/4700--D Electrical Schematic Optional Operator Cab (Serial Numbers Above 400000000)
- Groundsmaster 4500--D/4700--D Main Wire Harness (Serial number below 315000300)
- Groundsmaster 4500--D/4700--D Main Wire Harness (Serial Numbers 315000301 to 399999999)
- Groundsmaster 4500--D/4700--D Main Wire Harness (Serial Numbers 400000000 to 403450000)
- Groundsmaster 4500--D/4700--D Main Wire Harness (Serial Numbers Above 403450001)
- Groundsmaster 4500--D/4700--D Seat and Console Wire Harness (Serial number below 399999999)
- Groundsmaster 4500--D/4700--D Seat and Console Wire Harness (Serial Numbers 400000000 to 403450000)
- Groundsmaster 4500--D/4700--D Seat and Console Wire Harness (Serial Numbers Above 403450001)
- Groundsmaster 4500--D/4700--D Power Center Wire Harness(Serial number below 403450000)
- Groundsmaster 4500--D/4700--D Power Center Wire Harness(Serial Numbers Above 403450001)
- Deck 6 and 7 Wire Harness Groundsmaster 4700--D
- (Models 30881 and 30882) Engine Wire Harness Drawing Groundsmaster 4500--D/4700--D (Serial number below 315000000)
- Groundsmaster 4500--D/4700--D (Models 30881 and 30882) Engine Wire Harness Drawing(Serial Numbers 315000001 to 408000000)
- Groundsmaster 4500--D/4700--D(Models 30881 and 30882)Engine Wire Harness Drawing(Serial Numbers Above 408000000)
- Groundsmaster 4500--D/4700--D(Models 30881 and 30882)Engine DPF Sub--Wire Harness Drawing(Serial Numbers Above 408000000)
- (Models 30873 and 30874) Engine Wire Harness Drawing Groundsmaster 4500--D/4700--D
- Groundsmaster 4500--D/4700--D Wire Harness Diagram -- Two--Post ROPS Extension
- Groundsmaster 4500--D/4700--DPower Harness Kit -- Wiring Diagram
Groundsmaster 4500- D/4700- D Hydraulic System
Page 4 - 1
Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS 2............................
GENERAL INFORMATION 3.....................
Operator ’s Manual 3..........................
Check Hydraulic Fluid 3.......................
Towing Traction Unit 4.........................
Relieving Hydraulic System Pressure 5..........
Traction Circuit Component Failure 5............
Hydraulic Hoses 6............................
Hydraulic Hose and Tube Installation 7..........
Hydraulic Fitting Installation 8..................
HYDRAULIC SCHEMATICS 10...................
GM 4500- D Hydraulic Schematic 10............
GM 4700- D Hydraulic Schematic 11............
HYDRAULIC FLOW DIAGRAMS 12...............
Traction Circuit: LOW Speed (Mow) 12..........
Traction Circuit: HI Speed (Transport) 14.........
Lower Cutting Decks: Groundsmaster 4500- D 16.
Lower Cutting Decks: Groundsmaster 4700- D 18.
Raise Cutting Decks: Groundsmaster 4500- D 20.
Raise Cutting Decks: Groundsmaster 4700- D 22.
Mow Circuit 24...............................
Cutting Deck Blade Braking 26.................
Steering Circuit 28............................
Engine Cooling Fan Circuit 30..................
SPECIAL TOOLS 32............................
TROUBLESHOOTING 37........................
TESTING 44...................................
Traction Circuit Charge Pressure 46.............
Traction Circuit Relief Pressure 48..............
Reverse Traction Circuit Reducing Valve (PR)
Pressure 50................................
Rear Traction Circuit Relief (RV) Pressure 52.....
Piston (Traction) Pump Flow Test 54............
Cutting Deck Circuit Pressure 56................
Cutting Deck Circuit Relief Pressure 58..........
Deck Motor Case Drain Leakage 60.............
Steering Circuit Relief Pressure 62..............
Steering Cylinder Internal Leakage 64...........
Lift/Lower Circuit Relief Pressure 66.............
Engine Cooling Fan Circuit 68..................
Gear Pump Flow 70...........................
ADJUSTMENTS 72.............................
Adjust Control Manifold Relief Valves 72.........
SERVICE AND REPAIRS 73.....................
General Precautions for Removing and
Installing Hydraulic System Components 73....
Check Hydraulic Lines and Hoses 74............
Priming Hydraulic Pumps 74...................
Flush Hydraulic System 75.....................
Filtering Closed- Loop Traction Circuit 76........
Charge Hydraulic System 77
...................
Ge
ar Pump 78................................
Gear Pump Service 82........................
Piston (Traction) Pump 84.....................
Piston (Traction) Pump Service . ...... .......87
Rear Traction Control Manifold 90...............
Rear Traction Control Manifold Service 92.......
Control Manifold Cartridge Valve Service 93......
HI/LOW Range Control Manifold 94.............
Rear Axle Motor 96...........................
Front Wheel Motors 98........................
Rear Axle and Front Wheel Motor Service 100....
Cutting Deck Motor 102........................
Cutting Deck Motor Service 104................
Deck Control Manifold 108.....................
Deck Control Manifold Service ( GM 4500- D) 110.
Deck Control Manifold Service ( GM 4700- D) 112.
Steering Control Valve 114.....................
Steering Control Valve Service 116..............
Steering Cylinder 118.........................
Steering Cylinder Service 120..................
Engine Cooling Fan Motor 122..................
Engine Cooling Fan Motor Service 126..........
Fan Control Manifold 128......................
Fan Control Manifold Service 130...............
Lift Control Manifold 132.......................
Lift Control Manifold Service (GM 4500- D) 134...
Lift Control Manifold Service (GM 4700- D) 136...
Lift Circuit Junction Manifold 138................
Lift Cylinders: Decks #1, #4 and #5 140..........
Lift Cylinders: Decks #2 and #3 142.............
Lift Cylinders: Decks #6 and #7 (GM 4700- D) 144
Lift Cylinder Service 146.......................
Hydraulic Reservoir 148.......................
Radiator and Oil Cooler Assembly 150...........
DANFOSS H1 CLOSED CIRCUIT AXIAL PIS-
TON PUMPS SERVICE MANUAL
DANFOSS H1 CLOSED CIRCUIT AXIAL PIS-
TON PUMPS REPAIR INSTRUCTIONS
DANFOSS K and L FRAME VARIABLE MO-
TORS SERVICE MANUAL
DANFOSS STEERING UNIT TYPE OSPM
SERVICE MANUAL
Hydraulic
System