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5
Trouble Shooting
Trouble Cause Action
Table will not raise.
No oil in reservoir.
Lowering valve or steel ball is
not seating.
Steel ball is not seating.
Relief valve is not adjusted
properly
Replenish reservoir.
Clean lowering valve or steel
ball or replace.
Clean or replace steel ball.
Reload truck within load
capacity and adjust valve by
pressure relief adjusting screw
(#12a)
Table will not remain elevated.
Lowering valve or steel ball is
not seating.
Oil seal or U-packing is worn
out.
Clean or replace lowering valve
or steel ball.
Replace oil seal or U-packing.
Table will not lower.
U packing is worn out.
Lowering valve plug #16A is
clogged.
Replace U-packing.
Replace lowering valve plug.
Oil leaks from lowering valve. O-ring is worn out. Replace o-ring.
Oil leaks from pump cylinder. Oil seal or U-packing worn out. Replace oil seal or U-packing
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