TABLE 4-1 TROUBLESHOOTING PROCEDURES
PROBLEM
POSSIBLE CAUSE
REMEDY
Loader slow and/or will not dump.
Hydraulic oil viscosity too heavy.
Change to proper oil.
Oil filter plugged.
Clean or replace filter.
Hydraulic pump worn.
Repair or replace pump.
Oil line restricted or leaking.
Check all hoses and tubes for leaks,
damage or restrictions. Replace
damaged or restricted hoses or tube lines.
Quick couplers not properly connected. Check connection - Replace if necessary.
Control valve does not shift properly.
Inspect clean, repair or replace valve.
Air in hydraulic system.
Cycle lift cylinders and bucket cylinders
several times to free system of air.
Cylinder leaks internally.
Replace seals.
Faulty valve.
Repair or replace valve.
Loader chatters or vibrates when
Air in hydraulic system.
Cycle lift cylinders and bucket cylinders.
raising or lowering.
Oil level too low.
Add oil as required.
Oil leaks.
Damaged fittings or hoses.
Replace damaged parts.
Loose connections.
Tighten fittings.
Worn or damaged O-ring or
Install a seal repair kit.
wiper seal in cylinder rod end.
Worn or damaged O-rings in
Install an O-ring repair kit.
valve.
Insufficient lift capacity.
Load is greater
Check loader specifications.
than boom lift capacity.
Check tractor system.
Internal boom cylinder leakage.
Replace any worn parts and install a seal
repair kit.
Improper hydraulic valve
Repair or replace valve.
operation.
Slow leakdown.
Worn control valve.
Have authorized Bush Hog dealer replace
seals.
Worn cylinder piston seals.
Have authorized Bush Hog dealer replace
seals.
Excessive wear on bottom of bucket
Float position not used while
Use float position provided on valve.
and wear pads.
operating loader.
Hydraulic cylinders inoperative.
Hose from control valve improperly
Refer to plumbing diagrams in Section V.
connected.
Pump operating continually on closed
Hydraulic control valve relief stuck
See your tractor manual for proper adjust-
center tractor hydraulic system.
open.
ment or Bush Hog dealer for loader valve.
Hydraulic control valve relief set
(3000 PSI is maximum pressure relief
too low.
setting recommended)
Valve not correct for closed
Install closed center plug on optional valve.
center operation
Loader lift and bucket tilt controls do not work
Hoses improperly connected.
Refer to plumbing diagrams in Section V
according to decal.
and correct hose connections.
Valve noisy and/or hot.
Open center control valve on
Install closed center plug on optional valve.
closed center tractor.
Tractor loads/pump squeals.
Closed center control valve on open
Install open center plug on optional valve.
center tractor.
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