Thomas SAF-T-LINER C2, Maintenance Manual

Page: 98 / 176

Detroit Drive Axle Lubricants
*
IMPORTANT: Lubricant used in Detroit rear axles must
meet Mercedes-Benz specification 235.20 (mineral) or
235.8 (synthetic). Mobil Delvac ™ Gear Oil A 80W-90 and
Mobilube ™ HD-A Plus 80W-90 meet specification 235.20.
Mobil Delvac 1 Gear Oil 75W-90 and Mobilube 1 SHC
75W-90 meet specification 235.8. For more product
information, see http://bevo.mercedes-benz.com.
Type Ambient Temperature
SAE
Viscosity
Grade
Mineral Oil –15°F (–26.1°C) and up
†
80W–90
Detroit Drive Axle Lubricants
*
IMPORTANT: Lubricant used in Detroit rear axles must
meet Mercedes-Benz specification 235.20 (mineral) or
235.8 (synthetic). Mobil Delvac ™ Gear Oil A 80W-90 and
Mobilube ™ HD-A Plus 80W-90 meet specification 235.20.
Mobil Delvac 1 Gear Oil 75W-90 and Mobilube 1 SHC
75W-90 meet specification 235.8. For more product
information, see http://bevo.mercedes-benz.com.
Type Ambient Temperature
SAE
Viscosity
Grade
Synthetic Oil –40°F (–40°C) and up
†
75W–90
*
Detroit rear axles do not require the use of friction modifiers.
†
There is no upper limit on the ambient temperature, but axle sump tem-
perature must never exceed 250°F (121°C).
Table 1, Detroit Drive Axle Lubricants
Recommended Lubricant, Meritor Drive Axles
Recommended
Lubricant Type
Ambient Temperature
Lubricant
SAE
Viscosity
Grade
Hypoid Gear Oil
API Service
Classification
GL–5
10°F (–12.2°C) and up
*
85W–140
–15°F (–26.1°C) and up * 80W–90
–40°F (–40°C) and up
*
75W–90
–40°F (–40°C) to 35°F (2°C) 75W
–40°F (–40°C) and up
*
75W–140
Synthetic Gear
Oil
–40°F (–40°C) and up * 75W–90
–40°F (–40°C) and up
*
75W–140
*
There is no upper limit on the ambient temperature, but axle sump tem-
perature must never exceed 250°F (121°C).
Table 2, Recommended Lubricant, Meritor Drive Axles
35–02 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 (25 mm) 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.
12/05/2003 f350436
1
2
1. Axle Housing Breather
2. Oil Fill Plug
Fig. 2, Component Locations, Meritor Axles
f350061a 10/05/2016
A
B
A. Correct (lube level at bottom of fill hole)
B. Incorrect (lube level below fill hole)
Fig. 3, Axle Lubricant Level Inspection
Rear Axle
35
Saf-T-Liner C2 School Bus Maintenance Manual, June 2015
35/2