Hydraulic system troubleshooting chart -3 – JLG 3246E2 ANSI Service Manual User Manual
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SECTION 3 - TROUBLESHOOTING
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– JLG Lift –
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Table 3-2. Hydraulic System Troubleshooting Chart
TROUBLE
PROBABLE CAUSE
REMEDY
Hydraulic pump noisy
Air bubbles in oil (reservoir to low.)
Replenish oil as necessary
Oil filter dirty
Clean and/or replace filter as necessary
Pump cavitating. (Vacume in pump due to oil
starvation)
Oil is reservoir too low
Replenish oil as necessary
Restricted reservoir air vent
Clean vent
Oil viscosity too high
Drain system and replace with recom-
mended oil. Refer to Table 1-2, Hydralic Oil
System overheating
Oil viscosity too high
Drain system and replace with recom-
mended oil. Refer to Table 1-2, Hydralic Oil
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