freightliner M2 Plus Maintenance Manual page 97

Rear Axle
Lubricant Type
Synthetic Gear Oil
*
There is no upper limit on the ambient temperature.
Meritor Drive Axle Lubricant Capacities for Single
Axle Model
MS–10–113D
MS–12–113D
RS–13–120
RS–15–120
RS–17–145
RS–17–144
RS–19–144
RS–19–145
RS–21–145
RS–21–160
RS–21–230
RS–23–160
RS–23–161
RS–23–186
RS–23–240
RS–26–185
RS–30–185
*
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 for
Single Axles
Meritor Drive Axle Lubricant Capacities for Tandem
Axle Model Axle Position
Forward
RT–40–145
Rear
Forward
RT–40–145P
Rear
Business Class M2 Plus Maintenance Manual, 02/10/2023
Meritor Drive Axle Recommended Lubricant
Ambient Temperature
–40°F (–40°C) and up
–40°F (–40°C) and up
Table 3, Meritor Drive Axle Recommended Lubricant
Axles
*
Capacity :
pt (L)
14 (6.6)
15 (7.1)
18.4 (8.7)
14.3 (6.8)
33.6 (15.9)
32.3 (15.3)
32.3 (15.3)
33.2 (15.7)
32.3 (15.3)
39.5 (18.7)
38.9 (18.4)
39.5 (18.7)
39.5 (18.7)
47.3 (22.4)
37.4 (17.7)
38.0 (18.0)
38.0 (18.0)
Axles
Capacity
30.2 (14.3)
25.8 (12.2)
30.2 (14.3)
25.8 (12.2)
Viscosity Grade
*
*
Meritor Drive Axle Lubricant Capacities for Tandem
Axle Model
RT–40–160
RT–44–145
RT–44–145P
RT–46–160
* Quantities listed are approximate and include 1 pint (0.5 liter) for each
wheel end and with the drive pinion at 3 degrees.
Table 5, Meritor Drive Axle Lubricant Capacities for
35–03 Axle Lubricant Changing
and Magnetic Plug
Cleaning
A regular schedule for changing the axle lubricant in
a particular vehicle and operation can be accurately
determined by analyzing oil samples taken from the
axle at specified intervals or mileages. Lubricant
suppliers frequently make their laboratory facilities
available for determining the useful life of their
product under actual service conditions. The final
schedule that is recommended may, for economic
reasons, be related to lubricant changes that are
governed by climatic conditions and magnetic plug
maintenance. Change lubricant type and viscosity as
climatic temperatures demand, regardless of vehicle
mileage or established change schedule.
*
The normal operating temperature of compounded
lubricants during the summer season is about
160 to 220°F (71 to 104°C). The chemicals and
additives that give these lubricants increased load
carrying capacity oxidize faster at temperatures
above 220°F (104°C), contributing to more rapid
lubricant deterioration. For this reason lubricants of
Meritor Specification
75W–90
75W–140
Axles
Axle Position
Forward
Rear
Forward
Rear
Forward
Rear
Tandem Axles
35
0–76–N
0–76–M
*
Capacity
39.1 (18.5)
34.4 (16.3)
29.3 (13.9)
25.1 (11.9)
39.1 (18.5)
34.4 (16.3)
35/3