JLG 1230ES Service Manual - Manual (Page 49)

SECTION 4 - BASE COMPONENTS
3121222 – JLG Lift – 4-13
Wheel Drive Brake - Manual Disengage Procedure
In the event of a power loss to the Torque-Hub, the park-
ing brake will engage as a safety precaution. Should the
unit need to be towed or pushed to an area where it can
be serviced or recharged the operator will need to manu-
ally disengage the parking brakes. The following proce-
dure outlines how this is to be done.
IF THE MACHINE IS ON ANY INCLINE, THE WHEELS MUST BE
ADEQUATELY BLOCKED PRIOR TO MANUALLY DISENGAGING
THE BRAKES. FAILURE TO DO SO MAY RESULT IN INJURY OR
EVEN DEATH.
1. Make sure the E-stop plunger is pushed in and the
key is removed from the key switch on the Ground
Control Station.
2. Remove the 2 Back Cover Bolts (1). The Back Cover
Bolts are also the release bolts for the brake. The
size of the back cover bolts (5) is 0.8 x 20mm long.
3. Remove the 2 Cover Plate Bolts (2) from the front of
the cover area near the cable exit. The size of the
Cover Plate Bolts is (#8 -32UNC x .500 inches long)
4. Remove the Cover Plate (6), Strain Relief (4), Back
Cover (7), and Cover O'ring (3).
5. Insert the Back Cover Bolts (1) into the two holes in
the brake housing at the 3 and 9 o'clock positions.
6. Tighten down bolts and the brake will disengage.
7. Repeat this procedure for the other wheel drive.
THE DISENGAGE BOLTS MUST BE REMOVED FROM THE BRAKE
HOUSING AFTER THE MACHINE IS TOWED OR PUSHED TO ITS
SERVICING LOCATION. THE BRAKES CAN NOT BE ENGAGED
WITH THE DISENGAGE BOLTS IN THE BRAKE HOUSING. THIS
WILL CAUSE THE MACHINE TO ROLL WHEN PARKED ON AN
INCLINE.
Figure 4-4. Brake Manual Disengage Procedure