Product Manual

wc_tx004489en.fm
33
RD12A/12K Lifting and Transporting
3.5 Towing Bypass Valve
The drive circuit is equipped with a towing bypass valve (a) to allow oil to bypass
the drive motors and let the roller freewheel for towing.
The towing bypass valve should be used in emergency cases where the machine
has become stuck in loose or muddy soil, or cannot be driven due to an engine or
hydraulic system failure.
Procedure 1. Open the pump bypass by turning the towing bypass valve two turns
counterclockwise. See Towing the Machine.
NOTICE: Opening the towing bypass valve more than two turns could cause
hydraulic oil leakage.
2. Close the pump bypass by turning the towing bypass valve clockwise.
wc_gr014323
a
WARNING
With the towing bypass valve open, the drive circuit has no braking action and the
machine will roll freely.
► Apply the brake or attach the towing device before opening the towing bypass
valve.
► Close the towing valve immediately after the towing operation is complete to
prevent the machine from rolling unexpectedly.