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9.0 Troubleshooting JHS-2200A Hydraulic Stacker
Number in parentheses refers to corresponding number in parts breakdown, section 10.1.1
Trouble
Fork will not lift to
maximum height.
Fork will not rise.
Fork cannot be
lowered.
Hydraulic fluid leak.
The fork descends
without the release
valve working.
10.0 Replacement Parts
To order parts or reach our service department, call 1-800-274-6848 Monday through Friday (see our website
for business hours, www.jettools.com). Having the Model Number and Serial Number of your machine available
when you call will allow us to serve you quickly and accurately.
Probable Cause
Hydraulic oil level is low.
Oil level is low, or oil is too viscous.
Oil has impurities.
Hex nut (#62) is too high, keeping the
pumping valve open.
Air in hydraulic pump.
The lifting piston is deformed, resulting
from overloading.
The fork was kept in high position for
extended period, resulting in rusting
and jamming of the exposed piston rod.
Adjustment nut (#62) not in correct
position.
Fork frame and roller sprocket are
jammed.
Sealing parts worn or damaged.
Some parts cracked or worn.
Release valve unable to close properly
due to impurities in hydraulic oil.
Hydraulic system cracked or bored.
Air in the oil.
Seal parts worn or damaged in
hydraulic pump.
Adjustment nut (#62) not in correct
position.
Remedy
Fill with hydraulic oil.
Fill with oil, or change oil.
Change oil.
Adjust hex nut properly.
Release air from system by pulling up
pump release lever, then pumping
handle up and down several times.
Replace piston.
Keep fork in lowest position when not in
use. Keep piston well lubricated.
Adjust nut properly.
Correct jam; replace bearing if
necessary.
Replace parts.
Replace parts.
Replace with new oil.
Inspect and replace the waste parts.
Release air from system by pulling up
pump release lever, then pumping
handle up and down several times.
Replace worn or damaged parts.
Adjust nut properly.
7
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