freightliner 108SD 2021, Driver Manual

Page: 60 / 191

26–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine or motor, set the parking brake, and chock
the tires. Before working under the vehicle, always
place jack stands under the frame rails to ensure
the vehicle cannot drop. Failure to follow these
steps could result in serious personal injury or
death.
26–01 Transmission Fluid
Level Check
NOTICE
Operating a transmission with the fluid level
higher or lower than recommended can result in
transmission damage. Do not overfill the transmis-
sion.
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.
Eaton Fuller
NOTE: Check the transmission fluid level with
the transmission at operating temperature.
1. Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
2. Clean the area around the fill plug, then remove
the plug from the side of the gear case.
3. Using your gloved finger or a bent pipe cleaner,
check if the fluid is level with the fill opening. See
Fig. 1 .
4. If the fluid level is low, check the transmission for
leaks, and correct as needed.
5. If needed, add Eaton-approved 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
approved lubricants, refer to the Eaton website,
www.roadranger.com .
Eaton Approved Manual and Automated
Transmission Lubricants
Lubricant Type * Temperature
SAE
Viscosity
Synthetic transmission
lubricant meeting Eaton PS-
386 lubricant specification
All —
*
Do not mix types or brands of lubricant.
Table 1, Eaton Approved Manual and Automated
Transmission Lubricants
6. Clean the fill plug, then install it. Tighten the plug
as follows:
•
25 to 35 lbf·ft (34 to 48 N·m) for transmis-
sions with 3/4-inch pipe threads.
•
60 to 75 lbf·ft (81 to 102 N·m) for transmis-
sions with 1-1/4-inch pipe threads.
Allison
NOTE: For Allison transmissions equipped with
an oil level sensor, the transmission fluid level
can be checked electronically. For more infor-
mation, refer to the Allison Transmission web-
site,
www.allisontransmission.com .
Cold Check
Clean all dirt from around the end of the fluid fill tube
before removing the dipstick. Do not allow foreign
matter to enter the transmission. Dirt or foreign mat-
ter in the hydraulic system may cause undue wear of
transmission parts, make valves stick, and clog pas-
sages.
A. Full B. Low
Fig. 1, Checking Transmission Fluid Level
Transmission
26
108SD and 114SD Maintenance Manual, May 2016
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