4. Lubricant should be level with the bottom of the
fill hole (see Fig. 3), or with the top of the stand-
pipe opening. If low, check the axle for oil leaks,
and correct as needed. Add lubricant as re-
quired. See Table 1 for recommended drive axle
lubricants.
IMPORTANT: Axle housing breathers (see
Fig. 7) must remain clean and unclogged. Al-
ways check the axle breather whenever check-
ing lubricant level. Ensure that it is open and
unclogged. Check the breather more frequently
under adverse operating conditions. If the
breather is plugged or damaged, clean or re-
place it as needed.
5. Install and tighten the fill plug 40 to 60 lbf·ft (54
to 81 N·m).
6. For a two-speed axle with a shift unit, check the
lubricant level of the shift unit; see elsewhere in
this maintenance operation for the shift unit lubri-
cant level inspection procedure.
7. Remove the chocks from the tires.
Meritor Axle
CAUTION
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 level ground, apply the park-
ing brakes, and chock the tires.
2. Clean the fill plug and the area surrounding the
fill plug on the side of the axle carrier. See
Fig. 1. Remove the plug.
NOTE: Some Meritor axles have a small tapped
and plugged hole near and below the housing
oil fill hole. This smaller hole is for a lubricant
temperature indicator only, and should not be
used as a fill or level hole.
3. Check that the lubricant is level with the bottom
of the fill hole. See Fig. 3. If low, check for oil
leaks, and correct as needed. Add the specified
lubricant. See Table 3 for recommended drive
axle lubricants.
4. Install and tighten the fill plug 35 lbf·ft (47 N·m).
IMPORTANT: Axle housing breathers (see
Fig. 8) must remain clean and unclogged. Al-
ways check the axle breather whenever check-
ing lubricant level. Ensure that it is open and
unclogged. Check the breather more frequently
under adverse operating conditions. If the
breather is plugged or damaged, clean or re-
place it as needed.
5. For a two-speed axle with a shift unit, check the
lubricant level of the shift unit; see elsewhere in
this maintenance operation for the shift unit lubri-
cant level inspection procedure.
6. On non-drive axles using oil-lubricated wheel
bearings, check oil level at the wheels, and add
oil if low. Use the same lubricant as specified 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.
f350002a
1
2
3
06/07/94
1. Axle Housing Breather
2. Fill Plug
3. Temperature Indicator Plug
Fig. 7, Dana Spicer Axle Housing Breather
Rear Axle35
Century Class Trucks Maintenance Manual, April 200535/6
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