PREVOST X3-45 COMMUTER User Manual

SECTION 07: TRANSMISSION
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
5
system since they will cause valves to stick,
create undue wear to transmission parts and clog
small passages. Check the fluid level using the
procedures in Cold Check and Hot Check. Record
any abnormal level on your "Maintenance
Records".
WARNING
When checking the fluid level, be sure that the
parking brake and/or emergency brakes are set
and properly engaged, and the wheels are
chocked. Unexpected and possible sudden
vehicle movement may occur if these
precautions are not taken.
o Special care must be taken not to touch the
engine coolant tubing and/or exhaust pipe,
since this could cause severe burns.
o Do not wear loose clothing and, stay away
from rotating parts d
uring procedure;
personal injury could occur.
FIGURE 3: FLUID LEVEL DIPSTICK (ALLISON)
Always check the fluid level reading at least twice
when the engine is running. Consistency is
important in maintaining the accuracy of the
reading. If inconsistent readings persist, check the
transmission breather to ensure it is clean and
free of debris.
3.1.1 Cold Check
The purpose of the Cold Check is to determine if
the transmission has enough fluid to be operated
safely until a Hot Check can be made.
CAUTION
The fluid
level rises as sump temperature
increases. DO NOT fill above the Cold Run
band if the transmission fluid is below normal
op
erating temperature. During operation, an
overfull transmission can become overheated,
leading to transmission damage.
1. Move the vehicle to a level surface, put
transmission in «N» (Neutral), and set the
parking brake.
2. With the engine idling (500 - 800 rpm), shift
to «D» (Drive) and then shift to «R» (Reverse)
to clear the hydraulic system of air.
3. Run the engine at idle in «N» (Neutral) for
about one minute.
4. While the engine is running, remove the
dipstick from the tube and wipe it clean
(Figure 3). Insert the dipstick into the fill tube,
pushing down until it stops.
5. Remove the dipstick and observe the fluid
level. Repeat the check procedure to verify
the reading. If the fluid on the dipstick is within
the COLD CHECK band, the level is
satisfactory for operating the transmission
until the fluid is hot enough to perform a Hot
Check. If the fluid level is not within this
band, add or drain fluid as necessary to bring
the level within the COLD CHECK band.
6. Perform a Hot Check at the first opportunity
after the normal operating temperature of
160ºF to 200ºF (71ºC to 93ºC) is attained.
FIGURE 4: COLD CHECK
CAUTION
DO NOT operate the transmission for extended
periods of time until a Hot Check has verified
proper fluid level. Transmission damage can
result from extended operation at improper fluid
level conditions.

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