LS LL3301 - Page 19

TROUBLE SHOOTING
PROBLEM
POSSIBLE CAUSE
CORRECTION
Slow or erratic lift
Low hydraulic fluid level.
Check and replenish hydraulic fluid.
Cold hydraulic fluid.
Allow hydraulic system to warm up to
operating temperature.
Engine R.P.M. too slow
(hydraulic pump R.P.M. too
slow).
Increase engine speed to obtain
satisfactory loader operation.
Excessive weight in bucket.
Material weight exceeds
maximum specified loader
capacity.
Reduce material load.
Control valve linkage
binding/defective.
Check control valve linkage and repair if
worn/defective.
Aeration of hydraulic fluid
Refer to "Aeration of Hydraulic Fluid".
Quick disconnect coupler
restriction or coupler "Flow
checks"
Check coupler connections. Repair or
replace.
Hydraulic hose or tube line
restriction(hoses/tube line)
kinked or pinched.
Check hoses and tube lines 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.
Control valve leaking
internally.(bypassing fluid within
valve).
Replace control 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.
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.
Control valve leaking internally
Replace control valve and recheck
operation.
Hydraulic pump defective.
Refer to "Hydraulic Pump Capacity
Inadequate".