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PROBLEM:
Motor runs but Hydraulic Pump does not develop pressure
SOLUTIONS:
NOTE! Hydraulic pressure is not generated if the Motor Power Switch (W,
page 12) is OFF or the Pump Switch (X, page 11) is in the OFF position.
With the Pump Switch in the NORMAL position, the failure of the Hydraulic Pump
to develop pressure is loss of pump suction (prime). To ensure positive prime,
check the following:
1. Motor rotation (page 14).
2. Hydraulic Reservoir is filled to the correct level (page 14).
3. Hydraulic Pump Case is filled with the proper hydraulic fluid (page 56).
4. Loose Inlet Plumbing: Check that all inlet plumbing to the Hydraulic Pump
is tight ensure there is no air leakage into the hydraulic system.
PROBLEM:
Low or zero hydraulic pressure with unusual Hydraulic Pump noises.
SOLUTION:
The use of an incorrect hydraulic fluid can result is unusual noises from the pump,
excessive wear and moisture absorption. Ensure the hydraulic oil used is from the list
on page 56. In addition to the above, continuous excessive hydraulic oil temperature as
well as failure to change the hydraulic oil on a yearly basis will cause the oil to fail and
result in excessive Hydraulic Pump wear and unusual noises.
1. Loose Inlet Plumbing: Check that all inlet plumbing to Hydraulic Pump is tight
ensuring no air leakage into the hydraulic system.
NOTE! Hydraulic Pressure will not be developed in the off position if the
pump switch is in the off position or if there is a malfunction in the pump
circuit.
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