Jet WMH JHS-1100, Operating Instructions And Parts Manual

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6
Troubleshooting
Trouble Probable Cause Remedy
Fork will not lift to
maximum height.
Hydraulic oil level is low. Fill with hydraulic oil.
Oil level is low, or oil is too viscous. Fill with oil, or change oil.
Oil has impurities. Change oil.
Hex nut (#71 on JHS-1100, #62 on
JHS-2200) is too high, keeping the
pumping valve open.
Adjust hex nut properly.
Forks will not rise.
Air in hydraulic pump.
Release air from the system by
pulling pump release handle, then
pumping handle up and down several
times.
The lifting piston is deformed,
resulting from overloading.
Replace the piston.
The fork was kept in high position for
extended time resulting in rusting and
jamming of the exposed piston rod.
Keep fork in lowest position when not
in use. Keep piston well lubricated.
Adjustment nut (#71 on JHS-1100,
#62 on JHS-2200) not in correct
position.
Adjust nut properly.
Forks can not be
lowered.
Fork frame and roller sprocket are
jammed. Correct jam; replace bearing if
necessary.
Sealing parts worn or damaged. Replace parts.
Hydraulic fluid leak.
Some parts cracked or worn. Replace parts.
Release valve unable to close
properly due to impurities in hydraulic
oil.
Replace with new oil.
Hydraulic system cracked or bored. Inspect and replace the waste parts.
Air in the oil.
Release air from oil by pulling pump
release handle, then pumping handle
up and down several times.
Seal parts worn or damaged in
hydraulic pump.
Replace worn or damaged parts.
The forks descend
without the release
valve working.
Adjustment nut (#71 on JHS-1100,
#62 on JHS-2200) is not in correct
position.
Adjust nut properly.
Replacement Parts
Replacement parts are listed on the following pages. To order parts or reach our service department, call
1-800-274-6848 between 7:30 a.m. and 6:00 p.m. (CST), Monday through Friday. Having the Model
Number and Serial Number of your machine available when you call will allow us to serve you quickly and
accurately.