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4
Troubleshooting SLT-330F Scissor Lift Table
Numbers in parentheses refer to index numbers in the parts breakdown.
Trouble Probable Cause Remedy
Table will not rise.
No oil in pump reservoir. Replenish pump reservoir.
Lowering valve (22) or steel ball (21) is
not seating.
Clean lowering valve (22) or steel ball
(21) or replace.
Steel ball (16) is not seating. Clean or replace steel ball (16).
Table will not remain
elevated.
Lowering valve (22) or steel ball (21) is
not seating.
Clean or replace lowering valve (22) or
steel ball (21).
Oil seal (5) or U-packing (7) is worn out. Replace oil seal (5) or U-packing (7).
Table will not lower.
U-packing (7) is worn out. Replace U-packing (7).
Lowering valve plug (22) is clogged. Replace lowering valve plug (22).
Oil leaks from lowering
valve.
O-ring (27) is worn out. Replace O-ring (27).
Oil leaks from pump
cylinder.
Oil seal (31) or U-packing (32) is worn
out.
Replace oil seal (31) or U-packing (32).
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.
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