MAINTENANCE MANUAL - Meritor

• When the collar splines engage with the
splines on the differential case, the axle shaft
and the differential assembly lock together.
• When the differential operates with the DCDL
in the locked position, there is no differential
action between the wheels
• When the differential is operated in the unlocked
position, there is normal differential
action between the wheels at all times
Inter Axle Differential (IAD)
The Meritor inter-axle differential (IAD) is a driver
controlled,
Air actuated traction device. The IAD allows
for speed differences between the forward
and rear axles in a tandem while also providing
equal pulling power from each axle of the
tandem. By activating the IAD switch located in
the vehicle dash, improved traction is provided
for each axle.
The inter axle differential is also known as a
power divider or third differential.
Stall Testing Can Damage a Drive Axle
Stall testing is a procedure used to troubleshoot
transmissions, evaluate vehicle performance,
and test the service and park brakes.
During stall testing, or any similar procedure,
the drive axle input receives multiplied torque,
which can exceed the specified torque rating.
Excessive torque can damage a drive axle,
which will affect axle performance and component
life. A drive axle damaged by
stall testing will void Meritor’s warranty.
Call Meritor’s Customer Service Center at 0800-
55-5530 if you have questions regarding stall
testing.
Use of Traction Chains
Meritor recommends that if you are using traction
chains, you should install chains on both tires on
each side of all drive axles on the vehicle.
MAINTENANCE MANUAL
Introduction
Identification
Model
An identification tag is riveted on the axle housing
or on the differential. Figure 2.3 and Figure
2.4. Use the model and the ratio number
marked on the identification tag and the number
on the differential to order replacement parts
AXLE HOUSING
IDENTIFICATION TAG
AXLE
IDENTIFICATION TAG DFFERENTIAL
IDENTIFICATION
TAG
Figure 2.3
9