Western Star 47X 2020, Maintenance Manual

Page: 105 / 166

add oil if low. Use the same lubricant recom-
mended for the drive axle.
NOTE: When adding to or checking the oil level,
make certain the hub cap and plug are clean
before removing the plug; this will minimize the
possibility of dirt and road grime entering the
assembly.
Dana® Spicer®
NOTICE
Failure to keep the rear axle filled to the proper
level with the recommended lubricant can result in
rear axle damage.
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 oil fill plug and the area surrounding it;
see
Fig. 9 . Remove the plug from the fill hole (or
standpipe, if installed in the oil fill hole).
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, or the top of
the standpipe opening.
4. Check that the lubricant is level with the bottom
of the fill hole, or with the top of the standpipe
opening. See
Fig. 2 . If low, check for oil leaks,
and correct as needed. Add oil to the level of the
fill plug, using the lubricant recommended in
Table 7 .
5. Install and tighten the fill plug 40 to 60 lbf·ft (54
to 81 N·m).
IMPORTANT: Always check the axle breather
whenever checking the lubricant level. Check
the breather more frequently under adverse op-
erating conditions.
6. Check the axle housing breather. Make sure that
it is unclogged and free from corrosion. See
Fig. 9 . If the breather is plugged or damaged,
clean or replace it as needed.
f350062a 10/05/2016
1
2
3
1. Axle Housing Breathers
2. Carrier Oil Fill Plugs
3. Interaxle Differential
Fig. 8, Meritor Axle Housing Breathers
f350002a 10/06/2016
1
2
3
1. Axle Housing Breather
2. Fill Plug
3. Temperature Indicator Plug
Fig. 9, Dana Spicer Axle Housing Breather
Rear Axle
35
47X and 49X Maintenance Manual, August 2020
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