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- DHydraulic System Page 4 - 86
IMPORTANT: A case drain exists in the piston (trac-
tion) pump a nd a suction port is near the i nput shaft
of the gear pump (Fig. 70). Before the gear pump is
installed to t he piston pump, make sure that plugs
placed in both of these ports are removed. Failure to
remove plugs will cause excessive pressure in t he
piston pump and damage seals. Also, before secur-
ing gear pump to piston pump, fill piston pump
housing with clean hydraulic oil through case drain
hole.
4. Remove plugs that were placed in piston pump case
drain and gear pump suction port. Fill piston pump hous-
ing with new hydraulic oil through case drain hole.
5. Install gear pump to piston pump (see Gear Pump in
this section).
6. Using labels p laced during pump removal, connect
wire harness connectors to the two (2) solenoid coils on
left side of piston (traction) pump.
7. Fill piston (traction) pump housing with new hydraul-
ic oil through the case drain (90
o
barbed fitting) at the top
of the pump (Fig. 71). This will ensure that internal pump
components have adequate lubrication during initial op-
eration.
8. Remove plugs and caps from disconnected hydrau-
lic lines and fittings of the pump assembly. Install hy-
draulic lines to correct location on gear and piston
pumps (see Hydraulic Hose and Tube Installation in the
General Information section of this chapter).
9. Fill hydraulic reservoir with correct oil.
10.Install new hydraulic filter and fill hydraulic reservoir
with correct oil.
IMPORTANT: Refer to Traction Circuit Component
Failure in the General Information section of this
chapter for information regarding the importance of
removing contamination from the traction circuit.
11. Prime hydraulic pumps (see Priming Hydraulic
Pumps in this section).
12.Properly fill hydraulic system (see Charge Hydraulic
System in this section).
13.Stop engine and check for hydraulic oil leaks. Check
hydraulic reservoir oil level and adjust if necessary.
1. Piston (traction) pump
2. Gear pump
3. Piston pump case drain
Figure 71
2
3
1