TROUBLE SHOOTING
System relief valve squeals.
A low hydraulic fluid to warm up to
operating temperature.
Excessive load in bucket.
Weight exceeds specified
loader capacity.
Relief valve setting below
specifications.
Check and reset valve setting as needed
Hydraulic hose, tube line or
quick disconnect coupler
restriction.
Check for evidence of restriction in
hydraulic oil flow.
Repair or replace defective components.
Loader drops with control
valve spool in "centered"
position (no external oil
leakage evident.)
Cylinder piston assembly
leakage.
Check cylinders for leakage.
Note: A gradual drop over
an extended period of time
is a normal condition.
Control valve internal leakage.
Replace control valve and recheck.
Control valve spool(s) will
not return to centered
position.
Control lever linkage binding.
Determine origin of binding and repair.
Control valve spool centering
is broken.
Replace centering spring.
Control valve spool binding in
valve body spool bore.
Disassemble valve for inspection and
repair.
External hydraulic fluid
leakage.
Loose hydraulic connection.
Tighten loose connections.
Defective hydraulic hose, tube
line, adapter fitting or adapter
fitting o-ring.
Check for origin of oil leak and replace
defective part.
Control valve o-rings defective.
Replace defective o-rings.
Control valve spool or body
damaged or worn.
Cylinder rod packing set
leakage.
Check cylinders for leakage.
Repair as needed.
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