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 Schematics
- Hydraulic Flow Diagrams
- Special Tools
- Troubleshooting
- Testing
- Traction System Operation Testing
- Charge Relief Valve Pressure Test (Using Pressure Gauge)
- Transmission Piston Pump Flow Test (Using Tester with Pressure Gauges and Flow Meter)
- Traction Relief Valve Pressure Test (Using Tester with Pressure Gauges and Flow Meter)
- Wheel Motor Efficiency Test (Using Tester with Pressure Gauges and Flow Meter)
- PTO Pressure Valve Test (Using Pressure Gauge)
- Implement Relief Pressure Test (Using Pressure Gauge)
- Gear Pump Flow Test (Using Tester with Pressure Gauges and Flow Meter)
- Lift Cylinder Internal Leakage Test
- Service and Repairs
- General Precautions for Removing and Installing Hydraulic System Components
- Flush Hydraulic System
- Charge Hydraulic System
- Hydraulic Tank
- Wheel Motors
- Wheel Motor Service
- Transmission
- Transmission Service
- Gear Pump
- Gear Pump Service
- Manual Lift Control Valve (SN Below 313000000)
- Manual Lift Control Valve Service (SN Below 313000000)
- Lift Control Manifold (SN Above 313000000)
- Lift Control Manifold Service (SN Above 313000000)
- Polar TracTM Hydraulic Control Valve
- Polar TracTM Hydraulic Control Valve Service
- Lift Cylinder
- Lift Cylinder Service
- Polar TracTM Lift Cylinder
- Polar TracTM Lift Cylinder Service
- Oil Cooler
- 5 - Electrical System
- Electrical Schematics and Diagrams
- Special Tools
- Troubleshooting
- Electrical System Quick Checks
- Component Testing
- Ignition Switch
- Indicator Lights
- Hour Meter
- PTO Switch
- Neutral Switches
- Seat Switch
- Parking Brake Switch (SN Below 310000000)
- Parking Brake Switch (SN Above 310000000)
- Standard Control Module
- Standard Control Module Logic Chart
- PTO Solenoid Valve Coil
- Lift Control Manifold Solenoid Valve Coils (SN Above 313000000)
- Fusible Link Harness
- Diode Assembly
- Glow Relay
- High Temperature Warning Switch
- High Temperature Shutdown Switch
- Dual Temperature Switch (Polar TracTM Machines)
- Deck Lift/Lower Switch (SN Above 313000000)
- Fuel Pump
- Fuel Stop Solenoid
- Glow Controller
- Service and Repairs
- 6 - Chassis
- 7 - Cutting Deck
- 8 - Foldout Diagrams
- Electrical Drawing Designations
- Hydraulic Schematics
- Hydraulic Schematic (SN Below 313000000)
- Hydraulic Schematic (SN Below 313000000) with Rear Attach Lift Kit
- Hydraulic Schematic (SN Below 313000000) with Polar Trac Installed)
- Hydraulic Schematic (SN Below 313000000) with Polar Trac and Rear Attach Lift Kit
- Hydraulic Schematic (SN From 313000001 to 314999999)
- Hydraulic Schematic (SN Above 315000000)
- Electrical Schematics
- Circuit Diagrams
- Wire Harness
Groundsmaster 7200/7210 Hydraulic SystemPage 4 – 25
Traction System Operation Testing
Because the Groundsmaster 7200/7210 traction sys-
tem uses two (2) separate circuits, it can be difficult to
identify which circuit is causing a problem and what hy-
draulic tests should be performed. Use the following op-
eration tests and suggestions before performing the
hydraulic tests described in this section.
1. If machine does not track in a straight line, look for a
problem with components that affect the weaker traction
side of the machine. During operation, the machine will
steer toward the weaker side of the traction system. Be-
cause piston pump swash plate is controlled by traction
control lever movement, if one lever rotates its swash
plate more than the other lever, the machine will not
track in a straight line.
2. Drive the machine up a moderate incline, stop the
engine, place the traction control levers in the neutral
locked position and allow the transmission to hold the
machine in place (parking brake not applied). The ma-
chine should remain stationary on the incline or drift
slowly backwards in a straight line. If one of the trans-
mission traction circuits is faulty, the machine will roll
backwards toward the weaker traction circuit.
3. Wheel speed should be the same on both rear
wheels. Make sure hydraulic oil is at normal operating
temperature. With machine jacked up off the ground and
securely supported with jack stands, have an operator
in the seat move the traction control levers to the full for-
ward speed. Using a phototac, check the rotational
speed of both rear wheels. The wheel speed should be
from 190 to 200 RPM for both rear wheels.
4. If any of these operation tests suggest a traction sys-
tem problem, check the following before performing hy-
draulic tests.
A. Parking brake is dragging.
B. Traction control lever is not adjusted correctly.
C. Transmission bypass valve is not seated.
D. Check oil level in the hydraulic tank to make sure
that oil level is correct.
Hydraulic
System