JLG 1250AJP Service Manual - Manual (Page 399)

SECTION 5 - HYDRAULICS
3121171 – JLG Lift – 5-45
5.6 ENABLE VALVES
Removal
1. Make sure the machine is on a firm level surface.
2. Extend the axles until the axle locked light is illumi-
nated.
3. Position the machine with the booms on suitable
boom rests.
4. Shut off the engine; remove the key and tag out the
machine.
5. Locate and identify the three enable valves on the
left side of the machine. Mark the function that the
valve controls on the valve, i.e. tower lift, tower tele,
main lift.
6. Position a drain pan to catch any hydraulic spills and
tag and disconnect the hydraulic hoses going to the
three enable valves. Cap or plug all hoses to prevent
contamination of the hydraulic system and loss of
hydraulic oil.
7. Tag and disconnect the electrical harness from each
enable valve solenoid.
8. Remove the existing hardware securing the enable
valves to the turntable and remove the three enable
valves.
Installation
1. Install the enable valves onto the turntable using the
mounting hardware.
2. Connect all hoses and electrical lines as tagged dur-
ing removal.
3. If coils were removed, reinstall and torque to 5 foot
pounds (6.8 Nm) maximum.
4. Check the hydraulic oil level in the tank and replen-
ish as necessary.
5. Remove the tag out from the machine.
6. Proceed to next test procedure.
MAIN LIFT ENABLE
TOWER LIFT ENABLE
TOWER TELE ENABLE
Figure 5-49. Enable Valves