JLG DVSP Series Service Manual - Manual (Page 150)

SECTION 6 - TROUBLESHOOTING
6-36 – JLG Lift – 3121136
6.11 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 6-46. 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 extend or return line fittings.
—
Tighten or
Replace Fittings
—
3. Oil leaking around the hydraulic lines.
—
Tighten or
Replace
Hydraulic Lines
—
4. Oil leaking around the lift down valve.
—
Tighten Cartridge
in Pump Case
—
5. Oil leaking around the (Red) manual descent valve.
—
Replace Lift
Down Valve
—
Note: Do not overtighten the nut on the solenoid in step 5.