Troubleshooting
The charts that follow contain information to assist in
troubleshooting hydraulic circuit problems. There may
possibly be more than one cause for a machine mal-
function.
Refer to the Testing section of this Chapter for precau-
tions and specific hydraulic test procedures.
General Hydraulic Problems
Problem
Possible Causes
Hydraulic system operates hot.
Engine RPM is too low.
Hydraulic reservoir oil level is low.
Hydraulic oil is contaminated or the wrong type.
Brakes are applied or sticking.
Piston pump by--pass valve is open or damaged.
Cooling system is not operating properly.
Charge pressure is low.
Traction circuit pressure is incorrect.
Pump(s) or motor(s) are damaged.
Hydraulic reservoir oil level is low.
Wrong type of oil is in the hydraulic system.
Air is leaking in suction line.
Hydraulic oil in reservoir foams.
Hydraulic oil leak(s).
Fitting(s), hose or tube loose or damaged.
Missing or damaged O-ring.
Groundsmaster 5900/5910
Page 4 -- 33
Hydraulic System
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