78
PROBLEM POSSIBLE
CAUSE
CORRECTION
Quick disconnect coupler restriction
or coupler.
Check coupler connections. Repair
or replace.
Hydraulic hose or tubeline
restriction (hoses/tubeline kinked or
pinched).
Check hoses and tubelines for
evidence of restriction.
Lift cylinder piston assembly
leakage.
Check cylinders for leakage. Repair
as needed.
Relief valve erratic or set below
specifications.
Check and reset relief valve setting
as needed.
Loader valve leaking internally.
(Bypassing fluid within valve.)
Replace loader valve and recheck
operation.
Inadequate hydraulic pump
capacity.
Refer to "Hydraulic Pump Capacity
Inadequate".
Inadequate lifting capacity
Engine R.P.M. too slow.
Increase engine R.P.M.
Excessive load – material weight
exceeds specified loader capacity.
Reduce Load. Maximum load limit
on Bale Spear and Pallet Fork is
500 lbs.
Relief valve setting below
specifications.
Check and reset relief valve setting
as needed.
Lift cylinder piston assembly
leakage.
Check cylinders for leakage. Repair
as needed.
Loader valve leaking internally.
Replace loader valve and recheck
operation.
Hydraulic pump defective.
Refer to "Hydraulic Pump Capacity
Inadequate".
Aeration of Hydraulic Fluid
(generally indicated by foamy
appearance of fluid).
Low hydraulic fluid level.
Check and refill hydraulic system to
proper level.
Air leaking into suction side of
hydraulic pump.
Check for loose or defective
connections between reservoir and
hydraulic pump.
Hydraulic fluid foaming due to
improper hydraulic oil usage.
Refer to Tractor Operator’s Manual
and replace hydraulic oil using
recommended hydraulic oil.
System relief valve squeals.
Cold Hydraulic Fluid.
Allow hydraulic fluid to warm up to
operating temperature.
Excessive load in bucket. Weight
exceeds specified loader capacity.
Reduce load.
Relief valve setting below
specifications.
Check and reset valve setting as
needed.
Hydraulic hose, tubeline, or quick
disconnect coupler restriction.
Check for evidence of restriction in
hydraulic oil flow. Repair or replace
defective components.
35 Series 4WD, Model - 3535 & 4035 Loader June’08
