Hydraulic Leak Troubleshooting; Miscellaneous Hydraulic Leak Troubleshooting - JLG 15MVL Series Service Maintenance Manual

6.14 HYDRAULIC LEAK TROUBLESHOOTING

Miscellaneous Hydraulic Leak Troubleshooting

Overview Of Procedure
This series of steps gives remedies for various areas of the machine where leaks could occur.
STEP
1. Oil leaking around the lift cylinder rod.
2. Oil leaking around the cylinder extend or return line fittings.
3. Oil leaking around the hydraulic lines.
4. Oil leaking around the lift down valve.
5. Oil leaking around the (Red) manual descent valve.
Note: Do not overtighten the nut on the solenoid in step 5.
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Table 6-49. Hydraulic Leak Troubleshooting
ACTION
– JLG Lift –
SECTION 6 - TROUBLESHOOTING
SPEC YES
— Replace the Seal at
the end of the Piston
and Cylinder Barrel
— Tighten or Replace
Fittings
— Tighten or Replace
Hydraulic Lines
— Tighten Cartridge in
Pump Case
— Replace Lift Down
Valve
NO
—
—
—
—
—
6-43