8
8.0
Troubleshooting PTJ-A Series Pallet Trucks
Any disassembly of the pallet truck should be done by qualified personnel. Contact Jet technical service if
further assistance is needed.
Trouble Probable
Cause
Remedy
Hydraulic unit does not
lift.
Low oil level in reservoir.
Make sure there is no oil leakage from
valve, and add oil.
Steel ball not seated in hydraulic unit.
Place the lever in the down position and
pump the handle repeatedly.
Worn seal(s) in piston cylinder.
Have seal(s) replaced.
Once lifted, truck
lowers by itself.
Steel ball not seated in hydraulic unit.
Bleed the pump.
Worn seal in piston cylinder.
Have seal(s) replaced.
Relief valve not seated properly.
Bleed the pump.
Relief valve not adjusted properly.
Reload truck within load capacity and
adjust valve using the set screw (#721).
Oil leakage from each valve.
Tighten plug of each valve.
Forks will not lower.
Relief cam setscrew/nut out of
adjustment.
Refer to “Adjusting Relief Cam.”
Relief cam or chain element broken.
Replace affected elements.
Broken fork rods and linkage.
Inspect linkages for breaks or cracks.
Replace elements as needed.
Lever does not set at
neutral position
Relief cam nut on the chain (#108B) is
not positioned correctly.
Adjust the nut on the chain assembly.
Truck doesn’t roll
smoothly or evenly.
Wheels have debris embedded, or out
of round due to wear.
Inspect and remove debris. If worn,
replace wheels. NOTE: Always replace
wheels in pairs.
9.0
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.
