PREVOST X3-45 COMMUTER, Руководство по обслуживанию

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Mi14-01A Page 10 / 31 Rev: June 26, 2014
2.1 BEFORE TOWING PREPARATION
1. Set the transmission to neutral and apply
parking brake.
2. Chock the wheels to prevent the bus from
moving at time of releasing the parking brake
during the towing preparation.
3. On the L.H. dashboard panel, turn on the
hazard warning flashers. Preferably, use a
towing light bar.
FIG.19
4. Place the front wheels in a straight-ahead
position and keep the steering wheel from
turning. To do so, slide the driver’s seat close
to the steering wheel. Wrap the safety belt
around and through the steering wheel and
then fasten safety belt.
This will assure the bus to roll in straight
direction and eventually to be stopped by the
tow truck in the eventuality of a mechanical
failure of the tow truck lifting equipment.
FIG.20
2.1.1 Air Supply
Operate the engine when towing to maintain brake system air pressure. If the engine cannot be operated,
connect external air pressure lines from the tow truck.
CAUTION
Do not tow the bus without external air pressure applied to the emergency fill valve if the engine does
not operate. Without brake system air pressure, the emergency spring brakes may apply automatically
if system air drops below 40 psi (275 kPa). If failure prevents releasing the parking brakes with air
pressure, disengage the parking brakes mechanically.
“Brake” quick connect fitting
Flip down the access door located on the front bumper, connect an auxiliary air supply from the tow truck
in order to supply air for operation of the bus
service brake from the tow truck (fig.21 & 22).
“Air supply” quick connect fitting