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 - 99
Disassembly (Fig. 110)
1. Remove oil from lift cylinder into a drain pan by slowly
pumping the cylinder shaft. Plug both ports and clean
the outside of the cylinder.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise; clamp on the clevis
ONLY.
2. Mount lift cylinder in a vise. Use of a vise with soft
jaws is recommended.
3. Carefully remove collar with a pipe wrench.
4. Remove plugs from ports. Extract shaft, head and
piston by carefully twisting and pulling on the shaft.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Clamp on the clevis ONLY.
5. Mount shaft securely in a vise by clamping on the cle-
vis of the shaft. Remove nut and piston from the shaft.
Slideheadofftheshaft.
6. Remove piston seal and O- ring from the piston. Re-
move O- ring, back- up ring, rod seal and dust seal from
the head.
Assembly (Fig. 110)
1. Make sure all parts are clean before reassembly.
2. Coat new O- rings, piston seal, rod seal, back- up
ring and dust seal with clean hydraulic oil.
A. Install piston seal and O- ring to the piston.
B. Install dust seal, O- ring, back- up ring and dust
seal to the head.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Clamp on the clevis ONLY.
3. Mount shaft securely in a vise by clamping on the cle-
vis of the shaft.
A. Coat shaft with clean hydraulic oil.
B. Slide head onto the shaft taking care to not dam-
age the seals. Install rod seal onto shaft and into
head.
C. Install piston onto the shaft and secure with nut.
D. Remove shaft from the vise.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise; clamp on the clevis
ONLY.
4. Mount barrel in a vise.
5. Coat all internal parts with a light coat of clean hy-
draulic oil. Carefully slide piston, shaft and head assem-
bly into the barrel being careful not to damage the seals.
6. Install collar using a pipe wrench to secure head in
barrel.
Hydraulic
System