PREVOST X3-45 COMMUTER User Manual

SECTION 07: TRANSMISSION
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
7
6. Low fluid level is
displayed as shown. The
number indicates the
number of quarts of fluid
the transmission
requires.
7. High fluid level condition
with the number of quarts
in excess is displayed as
shown.
NOTE
Confirm a low fluid level condition by making a
manual fluid level check.
8. To exit the Fluid Level Display Mode, press
any range button «R», «N» or «D» at any
time.
NOTE
Note that the quantities LO 4 QTS and HI 3
QT are the lowest & highest values displayed
and that the actual variation in fluid level may
exceed these numbers.
If the fluid level check cannot be completed, an
invalid for Display fault is reported. Refer to table
below to review the codes and conditions.
CODE CAUSE OF FAULT
CODE
SETTLING OK Settling time too short
ENG RPM TOO
LOW
Engine speed (rpm) too
low
ENG RPM TOO
HIGH
Engine speed (rpm) too
high
MUST BE IN
NEU
N (Neutral) must be
selected
FLUID TEMP
TOO LOW
Sump fluid temperature
too low
FLUID TEMP
TOO HIGH
Sump fluid temperature
too high
VEH SPD TOO
HI
Output shaft speed
SENSOR FAILED Sensor failure
3.3 RECOMMENDED AUTOMATIC
TRANSMISSION FLUID
Only use fluids meeting Allison Transmission
specification TES295 or TES389 in your
transmission. Refer to TES295 or TES389
Approved Fluids list, found under the
Service/Parts heading on the home page of the
Allison Transmission web site
www.allisontransmission.com.
Allison Transmission recommends you take the
following into consideration when selecting the
appropriate fluid type for your transmission:
• Fluids meeting specification TES295 are
preferred over TES389 fluids for use in all
transmission applications.
• TES295 fluids are fully qualified for Severe
Duty and Extended Drain intervals.
• A TES295 fluid allows you to operate at a
lower ambient temperature than a TES389
type fluid.
• TES389 fluid is the minimum fluid
requirement approved for use in Allison
transmissions.
• To extend the TES389 fluid drain intervals
beyond the recommended mileage or hours
change interval, use a fluid analysis
program.
When choosing a fluid type to use, consider
what the minimum fluid operating temperature of
the fluid will be based on the ambient
temperatures reached in the geographical
location for the vehicle.
Transmission Fluid Operating Temperature Requirements
Fluid type
Minimum operating temperature
Celsius
Fahrenheit
TES295 -35 -31
TES389 -25 -13
CAUTION
Disregarding minimum fluid temperature limits
can result in transmis
sion malfunction or
reduced transmission life.

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