Western Star 47X 2020, Maintenance Manual

Page: 97 / 166

35–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, set the parking brake, and chock the tires.
Before working under the vehicle, always place
jack stands under the frame rails to ensure the
vehicle cannot drop. Failure to follow these steps
could result in serious personal injury or death.
35–01 Axle Lubricant and Filter
Change, and Magnetic
Strainer Cleaning
NOTICE
When operating under adverse conditions, it may
be necessary to change the axle lubricant at more
frequent intervals than listed in the scheduled
maintenance tables. Failure to do so could result
in axle damage.
For all axles, including tandem drive axles and two-
speed axles, perform the applicable procedures
under the heading, "All Axle Models." For a two-
speed axle with a shift unit, also change the shift unit
lubricant; see under the heading, "Two-Speed Axles
With Shift Unit."
All Axle Models
Detroit ™ Model 4 and Model 6
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
axle housing rear cover, remove the plug from
the oil fill hole. See
Fig. 1 .
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-
ture, the oil will run more freely and ensure that
the axle is flushed.
4. Clean the fill and drain plugs. Change them if
necessary.
1
2
4
3
2
B
A
12/07/2010 f350509a
A. Front View B. Rear View
1. Axle Breather
2. Breather Hose
3. Temperature Sensor Port
4. Oil Fill Plug
Fig. 1, Detroit Model 4 and Model 6 Tandem Axle
(forward axle shown)
Rear Axle
35
47X and 49X Maintenance Manual, August 2020
35/1