Manual Check Procedures
Cold Check
The concept of a cold check is to determine adequate fluid level for safe
operating until hot check can be performed.
• Park the motorhome on a level surface using the service brakes.
• The engine is operated at a low idle. Put the transmission in N (Neutral).
• Apply the parking brake and chock the wheels to prevent the motorhome
from moving.
• Allow the engine to run at idle (500-800rpm) for one minute.
• Apply the service brakes and shift to D (Drive), then to N (Neutral) and next
to R (Reverse) to fill the system. Finally shift to N (Neutral) and release the
service brakes. Allow the engine to continue to run at idle (500-800rpm).
• Remove the dipstick and wipe clean. Reinsert the dipstick fully into the tube
and remove to check fluid level. Repeat this to verify the reading if need-
ed.
• Safe operating level is anywhere within the COLD CHECK band on the dip-
stick. The fluid level is sufficient enough to operate until a HOT CHECK
can be run.
• If the level is not within this band, add or drain the fluid as necessary to bring
the level to the middle of the COLD CHECK band.
• Perform the HOT CHECK the first opportunity after reaching normal oper-
ating temperatures (160º-200ºF/71º-93ºC).
CAUTION: Low or high fluid level can cause overheating and irregular
shift patterns. These conditions can damage the transmission if not correct-
ed.
Hot Check
• Because the fluid level rises as the temperature increases, the fluid must be
hot to ensure an accurate check.
• Be sure the fluid has reached normal operating temperature (160º-200ºF/71º-
93ºC). If a transmission temperature gauge is not present, check the fluid
level when the engine water temperature gauge has stabilized and the trans-
mission has been operated under the load for at least one hour.
• Park the motorhome on a level surface and shift to N (Neutral). Apply the
parking brake and allow the engine to idle (500-800rpm).
• After wiping the dipstick clean, check the fluid level. Safe operating level is
anywhere within the HOT RUN band on the dipstick.
• The width of the HOT RUN band is approximately 1 quart of fluid at nor-
mal temperature range.
• If the level is not within this band, add or drain the fluid as necessary to bring
the level within the HOT RUN band.
• Be sure that the fluid level checks are consistent. Check the level more than
once. If the readings are not consistent check to be sure that the transmis-
sion breather is clean and not clogged. If the readings are still not consis-
tent, contact your nearest Allison distributor or dealer.
Chassis Information
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EXECUTIVE7•233
Transmission Oil Level Dipstick.
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