If the fluid level is not within the HOT RUN band,
add or drain fluid as needed to bring the fluid
level within the HOT RUN band. See Fig. 5.
Eaton Fuller and Meritor
NOTICE
Operating a transmission with the fluid level
higher or lower than recommended can result in
transmission damage. Do not overfill the transmis-
sion. Overfilling will force fluid out of the case
through the main shaft openings.
Do not mix types and brands of fluid, because of
possible incompatibility. Do not use fluid addi-
tives, friction modifiers, extreme-pressure gear
fluids, or multiviscosity lubricants.
With the transmission at operating temperature, and
the vehicle on a level surface, check the fluid level in
the transmission.
1. Clean the area around the fill plug, and remove it
from the side of the case.
2. Using your finger or a bent pipe cleaner, see if
the fluid is level with the fill opening. See
Fig. 1.
3. If the fluid level is low, check the transmission for
leaks, and correct as needed.
4. If needed, add the recommended fluid, until it is
level with the lower edge of the fill opening. See
Table 1 for approved transmission lubricants.
For more information and a complete listing of
Eaton approved lubricants, refer to the Eaton
website,
www.roadranger.com. For more infor-
mation and a complete listing of Meritor ap-
proved lubricants, refer to the ZF Meritor web-
site,
www.zf.com.
5. Clean the fill plug, then install it in the transmis-
sion. Tighten the plug as follows:
• 25 to 35 lbf·ft (34 to 48 N·m) for Eaton
Fuller transmissions with 3/4-inch pipe
threads.
• 60 to 75 lbf·ft (81 to 102 N·m) for Eaton
Fuller transmissions with 1-1/4-inch pipe
threads.
• 44 lbf·ft (60 N·m) for all ZF Meritor
FreedomLine automated transmissions.
• 35 to 50 lbf·ft (48 to 67 N·m) for all other
Meritor transmissions.
Transmission 26
Century Class Trucks Maintenance Manual, August 2017 26/7
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