MCi Reliability Driven Series Operator's Manual page 49

ALLISON GEN V
TRANSMISSION FLUID LEVEL CHECKS
Automatic Transmission Fluid
Access the transmission dipstick and fill tube from
the rear engine door.
Electronic Fluid Check
1. After reaching normal operating temperature
[140F - 220F (60C - 104C)], park the vehicle on a level
surface, select Neutral and allow the engine to idle
(500-800 rpm).
NOTE: Coach should be stationary for approx. two
minutes to allow the fluid to settle. NO fast idle
during electronic fluid check.
2. Simultaneously press the
buttons once. There may be a
short delay while the fluid and temperature stabilizes.
3. The fluid level will display:
If correct, OL-OK.
If low, OL-LO-# (number of quarts of
transmission fluid required).
If high, OL-HI-# (number of quarts
overfilled).
4. Confirm with a manual fluid level check.
Low and High fluid levels cause overheating
and irregular shift patterns. If not corrected,
transmission damage can occur.
July 2015
Manual Cold Fluid Level Check
Do a cold check to ensure that the transmission
has enough fluid for safe operation until a hot check
can be done. Check the reading at least twice.
1. Park the coach on a level surface and apply the
parking brake.
2. Run the engine for at least 1 minute.
3. Apply the service brakes, shift the transmission
to drive (D) and operate the engine at 1000 to
1500 rpm for 30 seconds. Shift to reverse (R) to
clear air from the hydraulic system. Shift to
neutral (N) and idle the engine at 500-800 rpm.
4. With the engine running, remove the dipstick
from the tube and wipe it clean.
5. Insert the dipstick into the tube and remove it.
Check the level reading.
6. Repeat to verify the reading.
7. If the fluid level is within the COLD RUN band,
the transmission may be operated until the fluid
is hot enough to perform a hot check. As
required, add fluid to bring the level to the
middle of the band.
8. Perform a hot check as soon as the coach
reaches normal operating temperature [140F -
220F (60C - 104C)].
Dipstick checks may not agree exactly with
sensor checks, because the oil level sensor
compensates for fluid temperatures.
47