Troubleshooting
The cause of an improperly functioning hydraulic sys-
tem is best diagnosed with the use of proper testing
equipment and a thorough understanding of the com-
plete hydraulic system.
Continued use of an improperly functioning hydraulic
system could lead to extensive internal component
damage.
The charts that follow contain information to assist in
troubleshooting. There may possibly be more than one
cause for a machine malfunction.
A hydraulic system with an excessive increase in heat
ornoisehasapotential forfailure.Shouldeither ofthese
conditions be noticed, immediately stop the machine,
turn off the engine, locate the cause of the trouble, and
correct it before allowing the machine to be used again.
Refer to the Testing section of this Chapter for precau-
tions and specific test procedures.
Problem
Possible Cause
Fitting(s), hose(s), or tube(s) are loose or damaged.
Hydraulic oil leaks
O--ring(s) or seal(s) are missing or damaged.
Oil level in reservoir is low.
Foaming hydraulic fluid
Hydraulic system has wrong kind of oil.
One of the pump suction lines has an air leak.
Hydraulic system operates hot
Traction system pressure is high due to load or brakes applied.
Oil level in reservoir is low, or inlet filter is loose or clogged.
Oil is contaminated or too light.
Oil cooler is damaged or plugged. By--pass relief is stuck open or
air flow is obstructed.
Charge pressure is low.
Traction pump by--pass valve is open or defective.
Wheel motor(s) or reel motor(s) are worn or damaged.
Traction pump is worn or damaged.
Neutral is difficult to find or unit oper-
ates in one direction only
External control linkage is misadjusted, disconnected, binding, or
damaged.
Traction pump is worn or damaged.
Traction response is sluggish
Charge pressure is low. Hydraulic oil is very cold.
Traction pump by--pass valve is open or worn.
Brake is not released.
Traction pump or wheel motor(s) are worn or damaged.
Hydraulic System
Page 4 -- 16
Reelmaster 2000--D
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