23
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 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.
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”.
1
6
Series, Model - 2
816
