Wacker Neuson HI 770XHD, Operator'S Manual

Page: 33 / 112

HI 770XHD Lifting and Transporting
wc_tx001881gb.fm
33
3.6 Testing the Breakaway System (Electric Brakes)
Requirements
„
Voltmeter
„
Battery charger or backup battery (charged)
When Test the breakaway system:
„
Before towing
„
Monthly if the machine is not in service
Procedure Perform the following procedure to test the breakaway system.
NOTICE: Disconnect the trailer wiring plug from the tow vehicle before testing.
Failure to do so will result in severe damage to the electronic brake control.
1. Connect the machine/trailer to the tow vehicle.
2. Disconnect the trailer wiring plug (a) from the tow vehicle.
3. Pull the breakaway pin (b) out of the brake switch (c) (to activate the brakes)
and attempt to tow the machine/trailer at a very slow speed (less than 5 mph).
When activated, a properly working breakaway system will cause substantial
drag on the trailer wheels and may even cause the trailer wheels to lock.
4. Stop the tow vehicle.
This procedure continues on the next page.
wc_gr008513
a
wc_gr008514
b
c
WARNING
Personal injury hazard. A faulty breakaway system may lead to an accident and
personal injury if the machine/trailer breaks away.
f
Do not tow the machine/trailer if the breakaway system is faulty.