PREVOST H3-41 Manual page 87

Automatic Transmission
Oil Level
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).
Perform the cold check first to verify the
NOTE:
transmission oil level before performing the hot
check.
The hot check can be performed when the
transmission oil reaches
temperature of 160°F to 250 °F (70°C to 120°C).
To check the transmission oil level, park the
coach on a level surface and apply the parking
brake. Run the engine between 1,000 and 1,200
RPM for approximately one minute to purge air
from the system. While the engine is idling, shift
the transmission into Drive (D), then Reverse (R)
and back into Neutral (N) in order to fill clutch
cavities and circuits with oil.
The automatic transmission oil level dipstick is
accessible through the engine compartment rear
door and is located on the left side of the engine.
ENGINE COMPARTMENT
WARNING: TO PREVENT
INJURY, DO NOT SERVICE TRANSMISSION
WEARING LOOSE CLOTHING. STAND CLEAR
OF THE ENGINE
COMPONENTS WHILE CHECKING THE OIL
LEVEL.
normal operating
OEH3B706
PERSONAL
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 hot 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.
ABOVE THE "COLD RUN" BAND BEFORE THE
TRANSMISSION REACHES 160 ° F TO 250 ° F
(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. With the engine
idling and the parking brake applied, shift
transmission from Forward (D) to Reverse (R) and
back into Neutral (N). 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.
7-5
CARE AND MAINTENANCE
To remove dipstick,
A hot check can be
OEH3B708
DO NOT ADD OIL
OFH3B710