PREVOST X3-45 Multiplex, Руководство по обслуживанию

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Section 07: TRANSMISSION
PA1562
5
3.1.2 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.
1. If the engine has been shut down for an
extended period of time, park the vehicle on a
level surface and apply the parking brake.
CAUTION
The oil level rises as sump temperature
increases. DO NOT fill above the "Cold Run"
band if the transmission oil is below normal
operating temperature. During operation, an
overfull transmission can become overheated,
leading to transmission damage.
2. Run the engine at idle in «N» (Neutral) for
about one minute.
3. Shift to Drive (D) and operate the engine for 30
seconds at 1000-1500 rpm; then shift to
Reverse (R) to clear the hydraulic system of
air.
4. Move the vehicle to a level surface, put
transmission in «N» (Neutral), and set the
parking brake.
5. Finally shift to Neutral (N) and allow the engine
to idle (500 - 800 rpm).
6. While the engine is running, remove the
dipstick from the tube and wipe it clean (Figs.
4 & 5). Insert the dipstick into the fill tube,
pushing down until it stops.
FIGURE 5: COLD CHECK
07050
7. 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 oil 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.
8. Perform a Hot Check at the first opportunity
after the normal operating temperature of
160ºF (71ºC) to 200ºF (93ºC) is attained.
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.
CAUTION
Obtain an accurate fluid level by imposing the
following conditions:
•
Engine is idling (500-800 rpm) in «N»
(Neutral).
•
Transmission fluid is at normal operating
temperature.
•
The vehicle is on a level surface.
3.1.3 Hot Check
CAUTION
The oil must be hot to ensure an accurate
check for this procedure. The oil level rises as
temperature increases.
To perform a Hot Check , do the following:
1. The Hot Check can be performed when the
transmission oil reaches the normal
operating temperature (160ºF to 200ºF /
71ºC to 93ºC). The transmission oil
temperature can be checked with the
dashboard message center display (MCD)
when selecting the Gauge Mode (refer to the
‘’Operator’s Manual’’ for added information).
2. Park the vehicle on a level surface and shift to
Neutral (N). Apply the parking brake and allow
the engine to idle (500 - 800 rpm).
3. Remove the dipstick from the tube and wipe it
clean. Insert the dipstick into the fill tube,
pushing down until it stops.
4. Remove the dipstick and observe the fluid
level. The safe operating level is anywhere
within the HOT RUN band on the dipstick.
Repeat the check procedure to verify the
reading.
5. If the level is not within this band, add or drain
fluid as necessary to bring the level within the
HOT RUN band. (Fig. 6).
FIGURE 6: HOT CHECK
07049