freightliner Custom Classic MT45 2022 Maintenance Manual page 79

Rear Axle
NOTE: If the vehicle is exposed to water deep
enough to cover the hubs, disassemble and in-
spect them for water damage and/or contamina-
tion. See Group 35 of the Walk-In Van Chassis
Workshop Manual for instructions, or take the
vehicle to an authorized Freightliner dealer.
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2. If the vehicle has just been driven, allow a few
minutes for the lubricant to settle.
3. Clean the fill plug and the area surrounding the
fill plug on the side of the axle carrier. Remove
the plug. Check lubricant level when the axle is
cold, or near room temperature. See
Detroit axle, or Fig. 2
4. Check that the lubricant is level with the bottom
of the fill hole. See
leaks, and correct as needed. Add oil to the level
of the fill plug. For a Detroit axle, use the lubri-
cant recommended in
For a Meritor axle, add SAE 80W-90 multipur-
pose gear lubricant, or an SAE 75W-90 multipur-
pose synthetic gear lubricant. Either type of lubri-
cant must meet MIL L-2105-D and be suitable for
American Petroleum Institute service classifica-
tion GL-5.
IMPORTANT: A lubricant level close enough to
be seen or touched is not sufficient. It must be
level with the bottom of the fill hole.
5. Install the oil fill plug and tighten it 30 lbf·ft (41
N·m) for Detroit axles or 35 lbf·ft (47 N·m) for
Meritor axles.
6. Inspect the axle for signs of leakage. If leakage
is indicated and the lubricant level is down, have
your dealer perform any necessary maintenance.
35–03 Axle Breather Checking
NOTE: For component locations, see
a Detroit axle or Fig. 2
The axle housing breather must remain unob-
structed. Whenever the axle lubricant level is
checked, also check that the axle breather is open.
Walk-In Van Chassis Maintenance Manual, July 2015
Fig. 1
for a Meritor axle.
Fig. 3. If low, check for oil
Table 1.
Fig. 1
for a Meritor axle.
A
10/05/2016
A. Correct (lube level at bottom of fill hole)
B. Incorrect (lube level below fill hole)
Fig. 3, Axle Lubricant Level Inspection
for a
Check more often under poor operating conditions. If
the breather is plugged, clean or replace it as
needed.
for
B
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