Allmand Brothers TLB6235 Tractor - Manual (Page 36)

36
LOADER LIFT AND BUCKET ROLL BACK (continued)
PROBLEM POSSIBLE CAUSE CORRECTION
Broken or leaking lines
Replace defective hose
and check for leaks
Dirty hydraulic oil
Drain and refill oil,
replace filter
Oil leaking past cylinder
seals
Replace seals
Oli leaking past control
valve
Repair or replace worn
section
Faulty relief valve
Clean or replace relief
valve
Dirty oil
Drain and refill oil,
replace filter
Partially plugged suction
strainer
Drain oil, clean suction
strainer and refill with
new oil
Control valve held open too
long
Return control to
neutral postion when
not in use
Worn pump Replace pump
Relief valve set too low
Reset relief valve
correctly
Oil too light for warm
weather
Use recommended oil
Engine R.P.M. too fast Reduce throttle setting
Damaged oil lines Replace damaged lines
Excessive oil flow over
relief valve from poor
operating techniques
Learn smoother
operting techniques
Plugged or bent oil cooler
fins
Clean and or straighten
oil cooler
Control valve tie bolts
loose (if equipped)
Torque bolts
sequentially-50, 70, 90
in/lb.
Damaged o-rings between
valve sections
Replace o-ring between
valve sections
Damaged o-rings on valve
spool
Repair control valve
Cylinder seals damaged Repair cylinder seal
Damaged o-rings on valve
drop check
Repair control valve
Broken oil lines Replace hose
Loose hydraulic fittings Tighten fittings
Oil leaks past seal Replace seal
Faulty relief valve Clean or replace valve
Dirty valve Clean valve
Scored bore or bent spool Replace valve section
Control linkage misaligned Correct misalignment
Return spring broken or
binding
Replace spring
Foreign matter in spool
bore
Clean bore
CONTROL VALVE
STICKING OR
WORKING HARD
LOADER FAILS TO
HOLD UP A LOAD
OIL
OVERHEATING
EXTERNAL
LEAKAGE
CYLINDER
MALFUNCTIONING