Service Manual
Table Of Contents
- Title Page
- Revision History
- Reader Comments
- Preface
- Table of Contents
- 1 - Safety
- 2 - Product Records and Maintenance
- 3 - Kubota Diesel Engine
- 4 - Hydraulic System
- Specifications
- General Information
- Hydraulic Schematic
- Hydraulic Flow Diagrams
- Special Tools
- Troubleshooting
- Testing
- Traction Circuit Relief Valve (R3) and (R4) Pressure Test
- Traction Circuit Charge Pressure Test
- Gear Pump (P3) Flow Test
- Front Wheel Motor Efficiency Test
- Piston (Traction) Pump Flow Test
- Relief Valve (PRV1) and (PRV2) Pressure Test
- Gear Pump (P1) and (P2) Flow Test
- Deck Motor Efficiency Test
- Lift Relief Valve (PRV) Pressure Test
- Gear Pump (P4) Flow Test
- Lift Cylinder Internal Leakage Test
- Steering Relief Valve (R10) Pressure Test
- Steering Cylinder Internal Leakage Test
- Service and Repairs
- General Precautions for Removing and Installing Hydraulic System Components
- Check Hydraulic Lines and Hoses
- Flush Hydraulic System
- Filtering Closed--Loop Traction Circuit
- Hydraulic System Start--up
- Hydraulic Reservoir
- Hydraulic Pump Drive Shaft
- Hydraulic Pump Assembly
- Piston (Traction) Pump Service
- Gear Pump Service
- Front Wheel Motors
- Rear Wheel Motors
- Wheel Motor Service
- CrossTrax AWD Manifold
- CrossTrax AWD Manifold Service
- Deck Control Manifold
- Deck Control Manifold Service
- Cutting Deck Motor
- Cutting Deck Motor Service
- Lift Control Manifold
- Lift Control Manifold Service
- Lift Cylinder
- Lift Cylinder Service
- Steering Control Valve
- Steering Control Valve Service
- Steering Cylinder
- Steering Cylinder Service
- Oil Cooler
- 5 - Electrical System
- General Information
- Special Tools
- Troubleshooting
- Electrical System Quick Checks
- Adjustments
- Component Testing
- Ignition Switch
- Indicator Lights
- Hour Meter
- Temperature Gauge
- PTO Switch
- Headlight Switch
- Seat Switch
- Joystick Raise and Lower Switches
- Traction Neutral Switch
- Parking Brake Switch
- Mow/Transport Switch
- Start Relay
- Main Power and Glow Relays
- Toro Electronic Controller (TEC)
- Fuses
- Diode Assembly
- Fusible Link Harness
- Hydraulic Solenoid Valve Coil
- Temperature Sender
- High Temperature Shutdown Switch
- Oil Pressure Switch
- Fuel Stop Solenoid
- Fuel Pump
- Service and Repairs
- 6 - Chassis
- 7 - Cutting Decks
- 8 - Foldout Drawings
- Hydraulic Schematic
- Electrical Schematic Sheet 1 of 2 (Serial numbers below 315000000)
- Electrical Schematic Sheet 2 of 2 (Serial numbers below 315000000)
- Eclectrical Schematic (Serial numbers 315000001 to 403430000)
- Eclectrical Schematic (Serial numbers above 403430001)
- Main Wire Harness Drawing (Serial numbers below 315000000)
- Main Wire Harness Diagram (Serial numbers below 315000000)
- Main Wiring Harness Drawing (Serial numbers 315000001 to 403430000)
- Main Wiring Harness Diagram (Serial numbers 315000001 to 403430000)
- Main Wiring Harness Drawing (Serial numbers 403430001 to 405699999)
- Main Wiring Harness Diagram (Serial numbers 403430001 to 405699999)
- Main Wiring Harness Drawing (Serial numbers above 405700000)
- Main Wiring Harness Diagram (Serial numbers above 405700000)
- Seat Wire Harness Drawing
- Seat Wire Harness Diagram
- Engine Wire Harness Drawing
- Engine Wire Harness Diagram
Groundsmaster 4300--D Hydraulic SystemPage 4 -- 105
3. If lift cylinder for deck #4 or #5 is being removed, re-
moveflangenutandcarriagescrewthatsecurer--clamp
to lift cylinder (Fig. 95).
4. Label all hydraulic connections for assembly pur-
poses. Thoroughly clean hydraulic connections prior to
loosening hydraulic lines from lift cylinder.
CAUTION
Before opening hydraulic system, operate all hy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter.
5. Disconnect hydraulic hoses from fittings in lift cylin-
derthatis toberemoved.Allowhosestodraininto asuit-
able container. Remove and discard O--rings.
6. Putcaps or plugs on disconnected hoses and fittings
to prevent contamination.
7. Removeoneretainingring(item11)andthrustwash-
er (item 12) from the cylinder slide pin (item 13). Pull pin
fromtheliftcylinderandliftarm. Locateandretrievesec-
ond thrust washer.
8. Remove flange head screw (item 3) and flat washer
(item 5) that retain lift cylinder to pivot shaft.
9. Remove lift cylinder from pivot shaft and frame.
10.If hydraulic fittings are to be removed from lift cylin-
der, mark fitting orientation to allow correct assembly.
Remove fittings from lift cylinder and discard O--rings.
Installation (Fig. 93)
1. Ifhydraulicfittingswereremovedfromliftcylinder,lu-
bricate new O--rings, position O--rings to fittings and
install fittings into lift cylinder ports (see Hydraulic Fitting
Installation in the General Information section of this
chapter).Make sure thatfittings are orientatedcorrectly.
2. Positionliftcylinder to theframe. The liftcylinderbar-
rel end should be attached to the machine frame.
3. Slide barrel end of lift cylinder onto pivot shaft. Se-
cure cylinder with flange head screw (item 3) and flat
washer (item 5). Torque screw from 67 to 83 ft--lb (91
to 112 N--m).
4. Align lift cylinder to lift arm mountingholes. Slide cyl-
inderslidepin (item13)(withthrustwasher(item12)and
retaining r ing (item 11) installed on one end) through the
lift cylinder and lift arm. Install second thrust washer on
pin and secure with retaining ring (item 11).
5. Remove caps and plugs from disconnected hoses
and fittings.
6. Coat new fitting O--rings lightly with clean hydraulic
oil, install new O--rings and connect hydraulic hoses to
fittings on lift cylinder. Tighten hose connections (see
Hydraulic Hose and Tube Installation in the General In-
formation section of this chapter).
7. If lift cylinder for deck #4 or #5 was removed, secure
r--clamptoliftcylinderwithflangenutandcarriagescrew
(Fig. 95).
8. Check oil level inhydraulic reservoir and add correct
oil if necessary.
9. Lubricate lift cylinder grease fittings.
10.Follow Hydraulic System Start--up procedures (see
Hydraulic System Start--up in this section).
1. Lift cylinder (#4 shown)
2. Carriage screw
3. R--clamp
4. Flange nut
Figure 95
1
2
3
4
Hydraulic
System