Technical Information 9-7
DOB 1300-1556
PA-1639 Operator's Manual 2020 X3-45 Commuter
Belt application
Type
Qty
A/C compressor - high
capacity HVAC system
V Belt BX71
2
Alternator - twin Bosch,
curb side
Multi-V-8 Rib
8PK1575
1
Alternator - single Bosch,
street side
Multi-V-10
Rib
10PK1695
1
Coolant pump
Multi- V- 10
Rib
10PK1512
1
NOTE
Belts specifications and configurations may
vary. For proper belt selection, always consult
your vehicle "Coach Final Record" .
VOLVO D13 ENGINE
Type
: . . . . . 4-stroke / inline six cylinders
Displacement
: 12.8 l, SOHC, 4-valve /cylinder
Power
: . . . . . 435 HP
Torque
: . . . . . 1665 lbf·ft (2257 Nm) @1050 TO
1300 RPM
Full dress, dry weight
: . . . . .2582 lb / 1174 kg
ALLISON TRANSMISSION
Allison B500 (B500R with the optional output
retarder)
electronically
controlled
six- speed
automatic transmission.
Allison B500 (B500R with the output retarder)
electronically controlled six- speed automatic
transmission.
GEAR RATIOS
1
st
................................................
3.51
2
nd
...............................................
1.91
3
rd
...............................................
1.43
4
th
................................................
1.00
5
th
................................................
0.74
6
th
................................................
0.64
Reverse:
4.80
Converter:
1.90
Differential ratio (ZF A-132 axle):
3.82
PROPELLER SHAFT
Dana
Spicer
SPL250
type
tubular
shafts,
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
brakes are air operated disc type brakes. The
emergency/parking brakes are located on the
drive axle. To ensure a constant running
clearance between pads and disc, the brakes are
equipped with a non-wearing, automatic adjuster
mechanism.
BRAKE CHAMBER EFFECTIVE AREA
Front axle
: . . . . . 24 in
2
Drive axle
: . . . . . 24/24 in
2
(service /emergency)
Tag axle
: . . . . . 16 in
2
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 6- sensor/5-
modulator (6s/5m) system. A wheel slip sensor is
mounted at each wheel.
The
Electronic
Control
Module
(ECM)
is
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.
Summary of Contents for X3 Commuter
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