10-4 KL120
Relief valve erratic or set below
specifications.
Control valve leaking internally.
(hypassing fluid within valve).
Inadequate hydraulic pump capacity.
Engine R.P.M. too slow.
Excessive load - material weight
exceeds specified loader capacity.
Relief valve setting below specifications.
Lift cylinder piston assembly leakage.
Control valve leaking internally
Hydraulic pump defective.
Low hydraulic fluid level.
Air leaking into suction side of hydraulic
pump.
Hydraulic fluid foaming due to improper
hydraulic oil usage.
Slow or erratic lift
Inadequate lifting capacity
Aeration of Hydraulic Fluid
(Generally indicated by
foamy apperance of fluid).
Problem Possible Cause Correction
Check and reset relief valve. Setting as needed.
Replace control valve and recheck operation.
Refer to "Hydraulic Pump Capacity Inadequate"
Increase engine R.P.M.
Reduce Load.
Check and reset relief valve setting as needed.
Check cylinders for leakge. Repair as needed.
Replace control valve and recheck operation.
Refer to "Hydraulic Pump Capacity Inadequate".
Check and refill hydraulic system to proper level.
Check for loose or defective connections between
reservoir and hydraulic pump.
Refer to Tractor Operator's Manual and replace
hydraulic oil using recommended hydraulic oil.
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