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Reelmaster 3550−DHydraulic System Page 4 − 26
Troubleshooting
The chart that follows contains information to assist in
troubleshooting. There may possibly be more than one
cause for a machine malfunction.
Review the hydraulic schematic and information on hy-
draulic system operation in the Hydraulic Flow Dia-
grams section of this Chapter. This information will be
useful during the hydraulic troubleshooting process.
Refer to the Testing section of this Chapter for precau-
tions and specific hydraulic test procedures.
General Hydraulic System Problems
Problem Possible Cause
Hydraulic oil leaks from system. Hydraulic fitting(s), hose(s) or tube(s) are loose or damaged.
O−ring(s) or seal(s) are missing or damaged.
Hydraulic fluid foams. Oil level in hydraulic tank is low.
Hydraulic system has wrong type of hydraulic oil.
The pump suction line has an air leak.
Incompatible hydraulic oils are mixed in the hydraulic system.
Water contamination is in the hydraulic system.
Hydraulic system operates hot
(above 200F (93C).
Traction pressure is high due to excessive load or brake applied.
Oil level in hydraulic tank is low, or inlet filter is loose or clogged
(NOTE: Other hydraulic systems are affected as well).
Hydraulic oil is contaminated or oil viscosity is too light.
Oil cooler is damaged or plugged.
Bypass valve in traction pump/hydrostat is open or defective.
Charge pressure is low.
Wheel motor(s) or cutting unit motor(s) are worn or damaged.
Traction pump/hydrostat is worn or damaged.