79
PROBLEM POSSIBLE
CAUSE
CORRECTION
Loader drops with loader valve
spool in "Centered" position (no
external oil leakage evident.)
Cylinder Piston assembly leakage.
Check cylinders for leakage.
Loader valve internal leakage.
Replace loader valve and recheck.
Note: A gradual drop over an
extended period of time is a normal
condition.
Loader valve spool(s) will not
return to centered position.
Valve handle linkage binding.
Determine origin of binding and
repair.
Loader valve spool centering is
broken.
Replace centering spring.
Loader valve spool binding in valve
body spool bore.
Disassemble valve for inspection
and repair.
Loader bucket moves freely after
dumping load
Tilt cylinder cavitation has occurred.
Use of regen function while
dumping load will eliminate
problem. Refer to Page 36.
External hydraulic fluid leakage.
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.
Loader valve o-rings defective.
Replace defective o-rings.
Loader valve spool or body
damaged or worn.
Replace loader valve.
Cylinder rod packing set leakage.
Check cylinders for leakage. Repair
as needed.
Hydraulic pump capacity
inadequate.
Cold hydraulic fluid.
Allow hydraulic fluid to warm up to
operating temperature.
Engine R.P.M. too slow.
Increase engine R.P.M.
Low hydraulic fluid supply.
Refer to Tractor Operator’s Manual
for service recommendations.
Hydraulic hose restriction.
Check for evidence of restriction in
hydraulic hoses.
Hydraulic pump defective.
Refer to Tractor Operator’s manual
for recommended service
procedures. Replace hydraulic
pump if determined to be defective.
Lift cylinder rods bend when lift
cylinders extended.
Excessive shock load on lift
cylinders during transport.
Replace defective parts. Review
and observe proper and safe
operational practices.
Bucket cutting edge wear is
uneven side to side
Bucket is not level to ground.
Check rear tire inflation and adjust
to level bucket to ground. Make
sure ballast box is equally added to
from right and left side of tractor.
35 Series 4WD, Model - 3535 & 4035 Loader June’08
