PREVOST X3-45 COMMUTER User Manual

Mi14-01E Page 12 / 38 Rev: Oct 2021
2.1.1 Electrical Power and 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 (Figure 21 & Figure 22).
“Air supply” quick connect fitting
While the vehicle is being towed, connect an auxiliary air supply from the tow truck to the quick connect
fitting identified AIR SUPPLY to supply air for all systems (brakes, suspension, accessories) through the
air dryer (Figure 21 & Figure 22).
Tow truck connector
The tow truck connector provides electrical supply from the tow truck to the rear clearance lights, the rear
flasher lights, the tail lights and the stop lights.
Figure 21
Figure 22: FRONT TOWING AIR SUPPLY ACCESS
PANEL QUICK CONNECT FITTINGS

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in