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.
Probable Cause | Remedy | |
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Hydraulic oil level is low. | Fill with hydraulic oil. | |
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Oil level is low, or oil is too viscous. | Fill with oil, or change oil. | |
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Oil has impurities. | Change oil. | |
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Hex nut (#62) is too high, keeping the | Adjust hex nut properly. | |
pumping valve open. | ||
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| Release air from system by pulling up | |
Air in hydraulic pump. | pump release lever, then pumping | |
| handle up and down several times. | |
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The lifting piston is deformed, resulting | Replace piston. | |
from overloading. | ||
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The fork was kept in high position for | Keep fork in lowest position when not in | |
extended period, resulting in rusting | ||
use. Keep piston well lubricated. | ||
and jamming of the exposed piston rod. | ||
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Adjustment nut (#62) not in correct | Adjust nut properly. | |
position. | ||
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Fork frame and roller sprocket are | Correct jam; replace bearing if | |
jammed. | necessary. | |
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Sealing parts worn or damaged. | Replace parts. | |
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Some parts cracked or worn. | Replace parts. | |
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Release valve unable to close properly | Replace with new oil. | |
due to impurities in hydraulic oil. | ||
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Hydraulic system cracked or bored. | Inspect and replace the waste parts. | |
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| Release air from system by pulling up | |
Air in the oil. | pump release lever, then pumping | |
| handle up and down several times. | |
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Seal parts worn or damaged in | Replace worn or damaged parts. | |
hydraulic pump. | ||
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Adjustment nut (#62) not in correct | Adjust nut properly. | |
position. | ||
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10.0Replacement Parts
To order parts or reach our service department, call
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