PREVOST H3-41 Manual page 78

CARE AND MAINTENANCE
ENGINE OIL VALVE
ENGINE COMPARTMENT
AUTOMATIC TRANSMISSION
OIL LEVEL
The automatic transmission oil level dipstick is
accessible through the engine compartment rear
door and is located on the left side of the engine.
To check the transmission oil level, a "cold check"
and a "hot check" must be performed. A cold
check must be made when the transmission oil is
between 60 °F and 140 °F (16 °C and 60 °C).
Note :
Perform the cold check first to verify the
transmission oil level before performing the hot
check.
Warning :
To prevent personal injury, do not
service transmission wearing loose clothing.
Stand clear of the
components while checking the oil level.
engine and rotating
To prevent dirt and foreign matter from entering
the transmission, clean the end of the oil fill tube
before removing dipstick.
unscrew filler cap approximately three turns, and
pull out dipstick.
Cold Check
Run the engine until the transmission oil
temperature is between 60 °F and 140 °F (16 °C
and 60 °C). With the engine idling, make sure the
parking brake is applied and the transmission is in
Neutral (N). Remove and wipe the dipstick with a
clean cloth. Check oil level. If the oil level is
within the COLD RUN band, a cold check can be
performed. If the oil level is on or below the lower
line of the COLD RUN band, add oil until the level
lies within the COLD RUN band. If the oil level is
above the COLD RUN band, drain oil until the
level is within the band.
performed when the transmission reaches normal
operating temperature of 160 °F to 250 °F (70 °C
to 120 °C).
Caution :
The oil level rises as oil temperature
rises. Do not add oil above the "cold run" band
before the transmission reaches 160
° °
(70 C to 120 C).
Hot Check
Make sure the transmission oil temperature is
between 160°F and 250°F (70°C and 120°C)
before performing the hot check. Run the engine
between 1,000 and 1,200 RPM for approximately
one minute to purge air from the system. With the
engine idling and the parking brake applied, shift
transmission from Forward (D) to Reverse (R)
and back into Neutral (N) to fill clutch cavities with
oil. Remove and clean dipstick, then check oil
level. If the oil level is on or under the lower HOT
RUN line, add just enough oil to bring up the level
to the middle of the HOT RUN band.
Note :
Approximately 1 quart (0.95 liters) of oil
will raise the oil level from the lower line of the
7-4
To remove dipstick,
A hot check can be
OEH3B708
° °
F to 250 F
OFH3B710