PREVOST X3-45 2016 Maintenance Manual Download

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Section 07: TRANSMISSION

PA1593

WARNING

A significant amount of oil may drain from oil
lines when they are disconnected.

4. Unfasten the constant-torque hose clamps

and remove the two hoses.

5. Unscrew the holding bolts and nuts and

remove the oil cooler from engine
compartment.

6. CLEANING AND INSPECTION OF

ALLISON AUTOMATIC TRANSMISSION

The exterior of the transmission should be
cleaned and inspected at regular intervals. The
length of service and severity of operating
conditions will determine the frequency of such
inspections. Inspect the transmission for:

1. Loose bolts (transmission and mounting

components);

2. Oil leaks (correct immediately);

3. Loose, dirty, or improperly adjusted throttle

sensor linkage;

4. Damaged or loose oil lines;

5. Worn or frayed electrical harnesses, improper

routing;

6. Worn or out of phase drive line U-joint and slip

fittings.

CAUTION

DO NOT pressure wash the transmission
electrical connectors. Water and detergent will
cause the contacts to corrode or become faulty.

6.1 BREATHER

The breather is located on the engine, flywheel
side near the valve cover. It serves to prevent
pressure build-up within the transmission and
must be cleaned to keep the passage opened.
The prevalence of dust and dirt will determine the
frequency at which the breather requires
cleaning. Use care when cleaning the engine.
Spraying steam, water or cleaning solution
directly at the breather can force the water or
solution into the transmission. Always use care
when removing the hose connector from
transmission to prevent the entry of foreign
matter.

7. ALLISON TRANSMISSION INSTALLATION

NOTE

For more clearance between the tag axle and
transmission, the tag axle may be unloaded
and jacked up, or retracted (if applicable).

1. With the starter motor removed, align one of

the 12 attaching screw holes in the flexible
plate with the access opening.

2. Place the transmission on a transmission

jack.

3. Install a headless guide bolt into one of the 12

threaded holes for flexible plate attaching
screws in the flywheel.

4. Lubricate the flywheel center pilot boss with

molybdenum disulfide grease (Molycote G, or
equivalent).

5. Raise transmission and position the flywheel

pilot boss into the flexible plate adapter. Align
the guide bolt previously installed in the
flywheel with the flexible plate hole facing the
access opening in the flywheel housing.

DANGER

Severe damages and/or personal injury can
occur if transmission is not adequately
supported.

5. Seat the transmission against the engine

flywheel housing. NO FORCE IS
REQUIRED. If interference is encountered,
move the transmission away from engine,
then investigate the cause.

CAUTION

The torque converter housing must be seated
against the flywheel housing prior to tightening
any screws. DO NOT USE SCREWS TO SEAT
THE HOUSING.

6. Start all torque converter housing screws,

and then tighten four of them gradually and in
a criss-cross sequence around the housing.
Tighten the 12 remaining screws.
Recommended torque is between 42-50 lbf-ft
(57-68 Nm).

PREVOST X3-45 2016, Maintenance Manual

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