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Section E
15 - 11
PROBLEM:
POSSIBLE CAUSE:
CORRECTIVE ACTION:
PROBLEM:
POSSIBLE CAUSE:
CORRECTIVE ACTION:
PROBLEM:
POSSIBLE CAUSE:
CORRECTIVE ACTION:
PROBLEM:
POSSIBLE CAUSE:
CORRECTIVE ACTION:
PROBLEM:
POSSIBLE CAUSE:
CORRECTIVE ACTION:
9803/3280
Hydraulics
Fault Finding
Leaks between sections.
1) Missing or cut seals.
1) Disassemble valve stack and check for missing or cut o-rings.
Sticking spool.
1) Linkage binding. 2) Damaged spool. 3) Uneven torque of tie-rod. 4) Incorrect number of shims
on tie-rods.
1) Check linkage. 2) Remove and inspect spool. 3) Loosen tie-rod bolts, check and re-torque. 4)
Disassemble and check that each tie-rod has one shim.
Mechanical detent will not hold.
1) Broken detent shaft.
1) Remove detent & inspect.
Electrical detent will not hold.
1) Current broken.
1) Check current going into detent.
Poor performance, slow operating speed and/or low maximum stall speed.
1) Blocked flow regulator spool.
1) Flow check, remove and clean flow regulator valve, refer to Service Procedures, Variable
Flow Pumps - Regulator Valve Adjustment.
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Section E
15 - 11
Issue 1
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