Western Star 47X 2020, Maintenance Manual

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4.1 For magnetic plugs, use a piece of key
stock or any other convenient steel slug
to short the two magnetic poles and divert
the magnetic field.
4.2 Clean away the collected material depos-
ited on each pole. Magnets will rapidly
lose their effectiveness as collected mate-
rial bridges the gap between the two
poles.
4.3 After the first oil is changed, inspect the
drain plug each time for large quantities
of metal particles.
4.4 After cleaning, install the drain plug(s)
and tighten to 30 lbf·ft (41 N·m).
5. Fill the axle with the recommended lubricant.
See
Table 3 for recommended drive axle lubri-
cants and Table 4 for lubricant capacities.
NOTE: Some Detroit 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.
5.1 Fill the axle through the oil fill hole. Lubri-
cant should be level with the bottom of
the oil fill hole. To check fluid level, see
Fig. 2 .
5.2 Install and tighten the fill plug 30 lbf·ft (41
N·m).
Detroit Drive Axle Lubricant, Model 4 and Model 6
*
Lubricant Type
Ambient
Temperature
Mobil Delvac 1 Gear
Oil 75W-90
Synthetic
–40°F (–40°C) and
up
†
IMPORTANT: Lubricant used in Detroit rear axles must
meet Mercedes-Benz specification 235.8/Detroit Fluids
Specification (DFS) 93K219.01. Mobil Delvac 1 Gear Oil
75W-90 meets this specification. For more product
information, see http://bevo.mercedes-benz.com or
https://ddcsn-ddc.freightliner.com/cps/rde/xchg/ddcsn/hs/
5931.htm.
*
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, Model 4 and
Model 6
Detroit Rear Axle Lubricant Capacity, Model 4 and
Model 6 (Hubs Full)
Axle
Oil Capacity:
Quarts (liters)
Forward-Rear, Model 4 14.3 (13.5)
*
Single and Rearmost Tandem,
Model 4
10.6 (10.0)
*
*
These values assume the wheel ends are properly lubricated. Actual oil
capacity might vary slightly depending on gear ratio.
Table 2, Detroit Rear Axle Lubricant Capacity, Model
4 and Model 6
Detroit
™
New Final Drive
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2. Clean the fill plug and the area around it. In the
carrier housing, remove the plug from the oil fill
hole. See
Fig. 3 for the forward axle, and Fig. 4
for the rear axle .
CAUTION
Be careful when draining the axle oil. It may be
very hot, and could cause personal injury if it con-
tacts the skin.
3. Place a drain pan under the rear axle drain plug.
Drain the oil when it is warm. At this tempera-
f350061a 10/05/2016
A
B
A. Correct (lube level at bottom of fill hole)
B. Incorrect (lube level below fill hole)
Fig. 2, Axle Lubricant Level Inspection
Rear Axle
35
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