3.15 Towing; Hydraulic Brake Release - JLG R4045 Operation And Safety Manual

SECTION 3 - MACHINE CONTROLS, INDICATORS AND OPERATION

3.15 TOWING

It is not recommended that this machine be towed, except in the event
of an emergency such as a machine malfunction or a total machine
power failure.
NOTE:
If machine is disabled to a point where the hydraulic system can-
not be operated, the steer circuit will also not be operational.
Then the machine will only track in the direction the front wheels
are currently positioned.

Hydraulic Brake Release

1.
Chock wheels or secure machine with tow vehicle.
2. At the ground control station turn power off by pressing the
Emergency Stop switch in.
3. Open the right side compartment door and locate the main
hydraulic control valve.
4.
Perform the following to set the drive motor control valve to
tow mode. On the drive control valve locate the tow mode
needle valve knob (1), screw the valve out until it stops.
5. On the main valve body, to release the brakes, push the
BLACK brake override button (2) in, (there is a detent
which will hold the valve in place).
6. Pump the RED knob (3) until pressure builds, approximately
5 to 10 strokes. The brakes should now be released.
7.
After towing is complete, chock the machine wheels.
Release the BLACK brake override button (2) and screw
the tow mode needle valve knob (1) all the way in to reset
the hydraulic brake.
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