Service Manual Owner's manual

SECTION 3 - TROUBLESHOOTING

3120728 – JLG Lift – 3-37

3.10 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.

Table 3-31. Hydraulic Leak Troubleshooting

STEP ACTION SPEC YES NO

1. Oil leaking around the lift cylinder rod.

—

Replace the Seal

at the end of the

Piston and

Cylinder Barrel

—

2. Oil leaking around the cylinder fitting/flow valve.

—

Tighten or

Replace Fittings

—

3. Oil leaking around the hydraulic lines.

—

Tighten or

Replace

Hydraulic Lines

—

4. Oil leaking around the lift up valve.

—

Tight Cartridge in

Pump Case

—

5. Oil leaking around the lift down valve.

—

Tighten Car tridge

in Pump Case

—

6. Oil leaking around the (Red) manual descent valve.

—

Replace Lift

Down Valve

—

Note: Do not overtighten the nut on the solenoid in steps 4, 5, and 6.