JLG 4013PS Service Manual - Manual (Page 86)

Axles, Drive Shafts, Wheels and Tires
5-12 3508PS, 3509PS, 3512PS, 3513PS, 4008PS, 4009PS, 4012PS, 4013PS, 4017PS, 40.8, 40.9
5.7 TOWING A DISABLED MACHINE
Towing a disabled machine should only be attempted as
a last resort, after exhausting all other options. Make
every effort to repair the machine, and move it under its
own power, before using the emergency towing
procedures outlined below.
On 17M machines, the park brake is hydraulically
operated. Therefore, the axle must have the park brake
manually be disabled. On 8, 9, 12 & 13M machines, the
park brake is cable operated and can be disabled in the
cab with the park brake lever.
5.7.1 Towing (8, 9, 12 & 13M)
1. Secure the machine to a suitable towing vehicle.
2. Release the park brake and set the transmission
control lever in (N) NEUTRAL.
3. Tow the machine to a suitable repair facility.
4. After towing is complete, engage the park brake.
5.7.2 Manually Releasing the Park Brake
(17M)
Note: Block the wheels of the machine BEFORE
attempting to release the park brake. Once the park
brake is released the machine’s park brake AND service
brakes are inoperable.
1. Measure the distance from the bolt head to the face
of the jam nut on all four of the manual brake release
bolts (9) located on each side of the front axle center
section (two per side). Record the measurements.
2. Loosen the jam nuts on the four manual brake
release bolts.
3. Turn all four release bolts in equally with a wrench or
socket BY HAND a quarter turn at a time up to
approximately 19 mm (0.750 in) or until resistance is
felt. Tighten the jam nuts.
Note: Turning the release bolts in to far could warp the
brake discs. DO NOT over tighten.
Note: After the machine has been towed to a secure
location, reactivate the park brake. Carefully follow the
procedures from start to finish. Consult your local JLG
distributor or the JLG Service Department if you are
unsure about any part of the procedure, or for specific
instructions concerning your particular situation.
5.7.3 Manually Resetting the Park Brake
(17M)
Note: Block the wheels of the machine BEFORE
attempting to reset the machine’s park brake. Once the
park brake is reset the machine’s park brake AND
service brakes are operable.
1. Loosen the jam nuts on all four manual brake
release bolts.
2. Turn all four manual brake release bolts OUT a
quarter turn at a time to the dimension recorded
before starting the towing procedure.
3. Tighten the jam nuts on all four manual brake
release bolts.
After repairs to the machine have been made, start the
machine and check the park brake and service brakes for
proper function.
MZ1020
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