TECHNICAL INFORMATION
panel behind the driver’s seat. For special tire
selection, a “PRÉVOST COACH SPECIAL
SPECIFICATION” chart is supplied with the
vehicle and is affixed on the left wall near the
driver’s seat.
Warning: Special tire selection may lower
maximum allowable speed limit, even below
posted speed limit. For maximum safety, check
with tire manufacturer.
Caution: These tire pressures are established
in accordance with the maximum allowable load
on each axle. A lower pressure is recommended
if the axle load is less than the above
specifications. Weigh vehicle fully loaded and
pressurize according to tire manufacturer's
recommendations. For non standard tire and
wheel specifications, see Prévost tire pressure
tabulation in "Coach Final Record".
BELTS
Make Model Qty
drive
(transfer)
Gates AX 73 3
drive (fan)
Dayco Poly
COG
1
compressor
Gates BX 97 2
Alternator
24V, 270 Amp
Detroit Diesel,
Gates, Dayco
Poly-V
12K
72"
1
Alternator
28V, 140 Amp
Gates BX 31 1
ENGINE
The engine is a Detroit Diesel DDEC IV Series
60, displacing 12,7 liters. It is an inline six
cylinder, four stroke, turbocharged, air to air
charge cooled, diesel engine with an overhead
camshaft, and four valves per cylinder.
Rated horsepower ............. 500 HP @ 2 100 rpm
Peak torque ................. 1,550 lbf•ft @ 1,200 rpm
Operating range .................... 1,200 – 2,100 rpm
TRANSMISSION
Allison World Transmission B500 electronically
controlled six speed automatic transmission.
(B500R with the optional output retarder).
GEAR RATIOS
1st .............................................................. 3.510
2nd ............................................................. 1.906
3rd .............................................................. 1.429
4th .............................................................. 1.000
5th .............................................................. 0.737
6th .............................................................. 0.639
Reverse ...................................................... 4.801
Converter ................................................... 1.790
Drive axle ratio ........................................ 4.56 : 1
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 with
automatic slack adjusters on front, drive and tag
axles The emergency/parking brakes are located
on drive and tag axles.
BRAKE CHAMBER EFFECTIVE AREA:
Front axle ................................................... 24 in
2
Drive axle .................................... 24 in
2
(service)
................................ 24 in
2
(emergency/parking)
Tag axle ...................................... 16 in
2
(service)
................................ 16 in
2
(emergency/parking)
AIR SYSTEM
Compressed air is provided by a 16.5 cfm
Bendix-Westinghouse “Tu-Flo”, two cylinder,
gear driven, water cooled and engine-oil
lubricated air compressor.
Other features and components of the air
system include an air dryer and nylon color
coded air lines.
ANTI-LOCK BRAKING SYSTEM (ABS)
The anti-lock braking system has one Electronic
Control Unit (ECU) controlling a four channel
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