Rev. F
Groundsmaster 3500--D Hydraulic System (Rev. D)Page 4 -- 27
Problem Possible Cause
Wheel motor will not turn. Brakes are binding.
Key on wheel motor shaft is sheared or missing.
Internal parts in wheel motor are damaged.
Wheel motor will not hold load in
neutral.
Make up fluid from charge pump is not available.
Hydrostat ball check v alves are damaged.
Cutting unit gear pump (P1) is noisy
(cavitation).
Reservoir oil level is low.
Suction line is restricted.
Suction line has an air leak.
Blades will not turn. Solenoid valve (R1) is stuck open.
An electrical problem exists (See Chapter 5--Electrical System).
Gear pump (P1) is damaged.
Blades(s) turn too slowly. Gear pump (P1) is inefficient (see Testing).
Cutting motor has internal leakage or malfunctioning cross--over
relief valve (see Testing).
Spindle bearing(s) are damaged.
Cutting units will not lift or lift slowly. Engine speed is too low.
Lift cylinder linkage is binding or broken.
Lift cylinder bushings are binding.
Reservoir oil level is low.
Charge pump (P2) pressure or flow is insufficient.
Charge pump (P2) is damaged.
Implement relief valve (1000 PSI) is stuck open.
Lift cylinders leak internally.
Steering control valve is defective.
Cutting units raise, but will not stay
up.
Lift cylinders leak internally.
Check valve within the lift control valve leaks.
Steering Problems. See Ross Troubleshooting Guide in the Hydraguide
TM
Hydrostatic
Steering System HGF Series Service Procedure or Sauer/Danfoss
Steering Unit Type OSPM Service Manual at the end of this chap-
ter.
Turning steering wheel turns ma-
chine in the opposite direction.
Hoses to the steering cylinder are reversed.
SafetyProduct Records
and Manuals
Kubota
Diesel Engine
Hydraulic
System
Electrical
System
Wheels, Brakes,
and Chassis
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