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--DHydraulic System Page 4 -- 42
Piston (Traction) Pump Flow Test (Using Tester with Flow Meter and Pressure Gauge)
GEAR
PUMP
CROSSTRAX
MANIFOLD
BYPASS
PISTON
(TRACTION)
PUMP
VALVE
FROM STEERING CONTROL VALVE
TO LIFT CONTROL MANIFOLD
TO STEERING CONTROL VALVE AND CHARGE CIRCUIT
TO MOW CONTROL
(REAR CUTTING UNITS)
(FRONT CUTTING UNITS)
TO MOW CONTROL
TESTER
Figure 43
Procedure for Piston (Traction) Pump Flow
Test
This test measures piston (traction) pump output (flow).
During this test, pump load is created at the flow meter
using the adjustable load valve on the tester.
IMPORTANT: Traction circuit flow for the
Groundsmaster 4300 is approximately 30 GPM
(113.5LPM).Use 40 GPM Hydraulic Tester #AT40002
(pressure and flow) for this test (see Special Tools
in this chapter).
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes. Make sure the hydrau-
lic tank is full.
2. Park machine on a level surface with the cutting
decks lowered and off. Shut off engine. Make sure mow
speed limiter is in the transport position to allow full
movement of traction pedal.
3. Read Precautions For Hydraulic Testing in this sec-
tion.
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.