Meritor Drive Axle Lubricant Capacities
Axle Model Capacity
*
: pints (L)
MS–10–113D 14 (6.6)
MS–12–113D 15 (7.1)
RS–13–120 18.4 (8.7)
RS–15–120 14.3 (6.8)
RS–17–145 33.6 (15.9)
RS–17–144 32.3 (15.3)
RS–19–144 32.3 (15.3)
RS–19–145 33.2 (15.7)
RS–21–145 32.3 (15.3)
RS–21–160 39.5 (18.7)
RS–21–230 38.9 (18.4)
RS–23–160 39.5 (18.7)
RS–23–161 39.5 (18.7)
RS–23–186 47.3 (22.4)
RS–23–240 37.4 (17.7)
RS–26–185 38.0 (18.0)
RS–30–185 38.0 (18.0)
*
Quantities listed are approximate and include 1 pint (0.5 liter) for each
wheel end and with the drive pinion at 3 degrees.
Table 4, Meritor Drive Axle Lubricant Capacities
35–03 Axle Breather Checking
NOTE: Detroit axles have a breather hose
wrapped around the housing breather. The
breather hose length should not be lower than
approximately 1 inch below the axle housing
weld seam.
The axle housing breather must remain clean. See
Fig. 1 and Fig. 2. When the axle lubricant level is
checked, check that the axle breather is open. Check
more often under poor operating conditions. If the
breather is plugged, clean it or replace it as needed.
35–04 Oil-Filled Hubs Oil Level
Checking, Tag Axle
WARNING
Be careful not to overfill the hubs. Overfilling may
cause oil to be forced out of the hubs and to con-
taminate the brake linings and other brake compo-
nents. This could result in loss of vehicle control
and lead to personal injury and property damage.
1. With the vehicle on a level surface, remove the
hub cap (also referred to as a beauty ring). See
Fig. 4.
2. Rotate the rear wheels and allow the oil in the
hubs to settle.
3. Chock the tires.
IMPORTANT: The oil level should be at, or no
more than 1/4 inch (6 mm) above the level indi-
cators on the hub caps.
4. If necessary, remove the filler caps (in the ends
of the hub caps) and add enough oil (80W–90
hypoid gear oil) to bring the oil to the proper
level.
5. Rotate the wheels, allow the oil to settle, and
check the levels again.
6. Install the filler caps securely.
07/28/2010 f400295
1
2
1. Cap Head
2. Hub Cap (Beauty Ring)
Fig. 4, Rear Axle Hub Cap Assembly
Rear Axle35
Recreational Vehicle Chassis Maintenance Manual, June 201535/4
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