LS tractor LL4100, Operator'S Manual

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TROUBLE SHOOTING
PROBLEM PROBLEM PROBLEM PROBLEM POSSIBLE CAUSE POSSIBLE CAUSE POSSIBLE CAUSE POSSIBLE CAUSE CORRECTION CORRECTION CORRECTION CORRECTION
Cold Hydraulic Fluid.
A low hydraulic fluid to warm up to operating
temperature.
Excessive load in bucket.
Weight exceeds specified
loader capacity.
Reduce load.
Relief valve setting
below specifications.
Check and reset valve setting as needed.
Hydraulic hose, tubeline
or quick disconnect
coupler restriction.
Check for evidence of restriction in hydraulic oil
flow. Repair or replace defective components.
Loader drops with control Loader drops with control Loader drops with control Loader drops with control
valve spool in "centered" valve spool in "centered" valve spool in "centered" valve spool in "centered"
position (no external oil position (no external oil position (no external oil position (no external oil
leakage evident.) leakage evident.) leakage evident.) leakage evident.)
Cylinder piston assembly
leakage.
Check cylinders for leakage.
Note: A gradual drop over Note: A gradual drop over Note: A gradual drop over Note: A gradual drop over
an extended period of time an extended period of time an extended period of time an extended period of time
is a normal condition. is a normal condition. is a normal condition. is a normal condition.
Control valve internal
leakage.
Replace control valve and recheck.
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.
Loose hydraulic
connection.
Tighten loose connections.
Defective hydraulic hose,
tubeline, 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.
Replace control valve.
Cylinder rod packing set
leakage.
Check cylinders for leakage. Repair as needed.
External hydraulic fluid
External hydraulic fluid External hydraulic fluid
External hydraulic fluid
leakage. leakage. leakage. leakage.
System relief valve System relief valve System relief valve System relief valve
squeals. squeals. squeals. squeals.
Control valve spool(s) will
Control valve spool(s) will Control valve spool(s) will
Control valve spool(s) will
not return to centered not return to centered not return to centered not return to centered
position.
position. position.
position.
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