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bühler
Allied Front-End Loader
- 29 - P4493
TROUBLE SHOOTING
Possible Cause
Quick couplers leaking
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 valve.
Air leak in pump inlet line.
Air in hydraulic system.
Oil level too low.
Worn bushings and/or pins.
Inlet line restricted or leaking.
Oil level too low.
Pump worn or damaged.
Damaged fitting or hoses.
Loose connections.
Worn or damaged O-ring wiper
seal in cylinder rod end.
Worn or damaged O-rings
at valve.
Solenoid or O-rings blown at
cap or spool ends (Restriction
on return port or pressure
plumbed to return port of
valve).
Problem
Loader slow and/or will not
dump.
Loader chatters or vibrates
when raising and lowering.
Excessive movement at
pivots.
Pump noisy.
Oil leaks.
Oil Leaks at Valve.
Remedy
Check connections and
compatibility or replace.
Change or replace filter.
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 lines.
Inspect, clean, repair or replace
valve.
Cycle lift cylinders and bucket
cylinders several times to free
system of air.
Replace seals.
Repair or replace valve.
Check, tighten or replace inlet line.
Cycle lift cylinders and bucket
cylinders. Add oil as
required.
Replace bushings and/or pins.
Check for air leaks, restrictions or
collapsed hose. Tighten or replace
hose. Clean filter if necessary.
Add oil as required.
Repair or replace pump.
Replace damaged parts.
Tighten fittings.
Install a seal repair kit.
Install an O-ring repair kit.
Remove restriction or ensure valve
is plumbed correctly.