6
Maintenance
1. Lubricate each friction point monthly with #2
tube grease.
2. Check the movement and wear of wheels.
3. Check for oil leakage from the hydraulic
cylinder.
4. Store with table in lowered position.
Troubleshooting
Items in parentheses refer to the index numbers in the parts breakdown.
Trouble Probable
Cause
Remedy
Table will not lift.
Oil level low in hydraulic pump.
Remove hex cap plug (9) and fill with
hydraulic fluid.
Lowering valve (29) or steel ball (26) is
not seating.
Clean lowering valve (29) or steel ball
(26) or replace.
Socket set screw (44) for pressure relief
valve (11) is not adjusted properly.
Reload truck within load capacity and
adjust valve by tightening or loosening
socket set screw (44).
Table will not remain
elevated.
Lowering valve (29) or steel ball (26)
not seating properly.
Clean or replace lowering valve (29) or
steel ball (26).
O-ring (5) or oil seal (7) is worn out.
Replace o-ring (5) or oil seal (7).
Table will not lower.
Oil seal (7) is worn out.
Replace oil seal (7).
Lowering valve (29) is clogged.
Replace lowering valve (29).
Oil leaks from lowering
valve (29).
O-ring (28) is worn out.
Replace o-ring (28).
Oil leaks from pump
cylinder (30).
Oil seal (39) or dust cover (40) worn
out.
Replace oil seal (39) or dust cover (40).
Replacement Parts
Replacement parts are listed on the following pages. To order parts or reach our service department, call 1-
800-274-6848 Monday through Friday, 8:00 a.m. to 5:00 p.m. CST. Having the Model Number and Serial
Number of your machine available when you call will allow us to serve you quickly and accurately.
Non-proprietary parts, such as fasteners, can be found at local hardware stores, or may be ordered from JET.
Some parts are shown for reference only, and may not be available individually.
