PREVOST X3-45 COMMUTER User Manual

SECTION 07: TRANSMISSION
8
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
3.3.1 Importance of Proper Fluid Level
It is important that the proper fluid level be
maintained at all times because the transmission
fluid cools, lubricates, and transmits hydraulic
power. If the fluid level is too low, the converter
and clutches do not receive an adequate supply
of fluid. If fluid level is too high, the fluid can
aerate, causing the transmission to shift
erratically or overheat.
3.3.2 Keeping Fluid Clean
Fluid must be handled in clean containers, fillers,
etc., to prevent foreign material from entering the
transmission. Place the dipstick on a clean
surface area while filling the transmission.
CAUTION
Containers or fillers that have been used to
handle antifreeze or engine coolant must
NEVER be used for handling transmission fluid.
Antifreeze and coolant solutions contain
ethylene glycol that, if introduced into the
transmission, can cause the clutch plates to fail.
3.3.3 Fluid Contamination
At each fluid change, examine the drained fluid for
evidence of dirt or water. A nominal amount of
condensation will emulsify during operation of the
transmission. However, if there is evidence of
water; check the cooler (heat exchanger) for other
signs of leakage. This, however, may also indicate
leakage from the engine fluid system.
3.3.4 Metal Particles
Metal particles in the fluid (except for minor
particles normally trapped in the fluid filter)
indicate damage has occurred in the
transmission. When these particles are found in
the sump, the transmission must be disassembled
and closely inspected to find the source. Metal
contamination will require complete disassembly
of the transmission and cleaning of all internal and
external circuits, coolers, and all other areas
where the particles could lodge.
CAUTION
If excessive metal contamination has occurred,
replacement of the fluid cooler and replacement
of all bearings within the transmission is
recommended.
3.3.5 Coolant Leakage
If engine coolant leaks into the transmission fluid
system, immediate action must be taken to
prevent malfunction and possible serious
damage. The transmission must be completely
disassembled, inspected, and cleaned. All traces
of the coolant contamination must be removed.
Friction clutch plates contaminated with ethylene
glycol must be replaced.

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