Engine; Allison Transmission; X3-45 Vip For Commercial Use; Gear Ratios - PREVOST X3-45 VIP 2017 Owner's Manual

ENGINE

Volvo D13 engine displacing 12.8 liters. The
engine is an inline six cylinder, four stroke,
turbocharged, air to air charge cooled, diesel
engine with SOHC with 4 valves per cylinder.
Power ..................................... 500 HP (373 kW)
Torque ............................. 1,770 lbf•ft (2400 Nm)
Recom. cruise speed range ........ 1400-1800rpm
Full dress, dry weight .............................. 2519 lb

ALLISON TRANSMISSION

X3-45 VIP MOTORHOMES
Allison World MH4000 electronically controlled
six speed automatic transmission (MH4000R
with the optional output retarder).

X3-45 VIP FOR COMMERCIAL USE

Allison World B500 electronically controlled six
speed automatic transmission for Commercial
Application (B500R with the optional output
retarder).

GEAR RATIOS

st
1 ................................................................ 3.510
nd
2 ............................................................... 1.906
rd
3 ............................................................... 1.429
th
4 ............................................................... 1.000
th
5 ............................................................... 0.737
th
6 ............................................................... 0.639
Reverse ...................................................... 4.801
Converter........................................................ 1.9
Differential ratio ............................................ 4.30
Differential ratio (optional) ............................ 3.91
Differential ratio (optional) ............................ 4.10
Differential ratio (optional) ............................ 4.56
Differential ratio (optional) ............................ 4.88

PROPELLER SHAFT

Hayes-Dana SPL250 type tubular shafts. It is
provided with heavy-duty universal joints.

BRAKES

The features of the braking system include a
dual system where the front and rear circuits are
completely independent from each other. The
Technical Information
brakes are air operated disc type brakes with
automatic slack adjusters on front drive and tag
axles. The emergency/parking
located on the drive and tag axles only.

BRAKE CHAMBER EFFECTIVE AREA:

Front axle ................................................... 24 in
Drive axle ............ 24/24 in
Tag axle .............. 14-16 in

AIR SYSTEM

Compressed air is provided by a twin cylinder,
31.8 cfm Wabco, gear-driven, water-cooled and
engine oil lubricated air compressor.

ANTILOCK BRAKING SYSTEM (ABS)

The antilock braking system has one Electronic
Control Unit (ECU) controlling a four channel
system. A wheel slip sensor is mounted at each
front axle and drive axle wheel. The Tag axle
wheels are slave to the drive axle wheels.
The Electronic Control
maintenance free. Its operating voltage is 24 ± 6
volts DC. The thermal operating range for the
ECM is from -40 to 167°F (-40 to 75°C).
The solenoid control valves are maintenance
free. Their operating voltage is 24 (+4.8, -2.4)
volts DC. The rated current draw is 1.65 amps.
The thermal operating range of the solenoid
control valves is from -40 to 176°F (-40 to 80°C).

TROUBLESHOOTING AND TESTING

For troubleshooting and testing of the vehicle's
antilock braking system, refer to Meritor WABCO
Maintenance Manual: "Anti-Lock Brake Systems
For Trucks, Tractors and Buses" or use
dashboard Driver Information Display (DID).
AUTOMATIC TRACTION CONTROL
(ATC) – ELECTRONIC STABILITY
PROGRAM (ESP)
In addition to the ABS function, vehicle may be
equipped with an advanced model of Bendix
EC-60 controller to provide an Automatic
Traction Control (ATC) feature. Bendix ATC
can improve vehicle traction during acceleration,
and lateral stability while accelerating through
curves. ATC utilizes Engine Torque Limiting
(ETL) where the ECU communicates with the
engine's controller and/or Differential Braking
9-7
brakes are
2
2
(service/emergency)
2
(service/emergency)
Module (ECM) is