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11. Troubleshooting Guide
TROUBLE
Loader slow or will not lift
and/or dump
Loader chatters or
vibrates when raising
or lowering
Oil leakage
Insufficient lift capacity
6212 01/11
© 2011 Alamo Group Inc.
OPERATION
POSSIBLE CAUSE
Hydraulic oil too heavy.
Oil filter plugged.
Hydraulic pump worn.
Oil line restricted or leaking.
Control valve does not shift
properly.
Air in hydraulic system.
Cylinder leaks internally.
Faulty relief valve (tractor).
Air leak in pump inlet line.
Air in hydraulic system.
Oil level too low.
Loose connections.
Defective fittings or hoses.
Worn or damaged o-ring or
wiper seal in cylinder rod end.
Worn or damaged or rings in
valve.
Load is greater than boom
lift capacity.
Improper hydraulic pump
operation.
Internal lift cylinder leakage.
Improper hydraulic valve
operation.
Operation Section 4-43
POSSIBLE REMEDY
Change to proper oil.
Clean or replace filter.
Repair or replace pump.
Check all hoses and tubes for leaks,
damage or restrictions. Replace
damaged or restricted hoses or tube
oil lines.
Inspect, clean, repair or replace
valve.
Cycle lift cylinders and bucket
cylinders several times to free
system of air.
Replace seals.
Clean and replace relief valve.
Check, tighten or replace inlet line.
Cycle lift and bucket cylinders.
Add oil as required.
Tighten fittings.
Replace defective parts.
Install a seal repair kit.
See "Cylinder Service".
Install an o-ring repair kit.
Check loader specifications.
Repair or replace pump.
Replace any worn parts and install
a seal repair kit. See "Cylinder
Service".
Repair or replace valve.
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