4 Prepare Parts for Assembly
18
Meritor Maintenance Manual MM-15103 (Issued 07-17)
Figure 4.4
Figure 4.5
A drive pinion and ring gear is machined as a matched set.
When you replace either a drive pinion or a ring gear, you must
replace both parts as a matched set. Do not mix old and new
parts. Damage to components can result.
2. Inspect pinions and gears for wear or damage. Replace pinions
and gears that are worn or damaged.
When you need to replace either a thrust washer, differential
side gear or pinion gear, you must replace all of these parts
with a new set. Do not mix old and new parts. Damage to
components can result.
3. Inspect the following main differential assembly parts for wear
or stress. Replace parts that are damaged. Figure 4.6.
앫 Inside surfaces of both case halves
앫 Both surfaces of all thrust washers
앫 The four trunnion legs of the spider pins
앫 Teeth, flat backface and splines of both differential side
gears
앫 Teeth, bore and spherical backface of all differential pinions
Figure 4.6
4. Inspect the axle shafts for wear and cracks at the flange, shaft
and splines. Replace the axle shafts, if required.
Repair
Repair or Replace the Parts
NOTE: Threads must be without damage and clean so that
accurate adjustments and correct torque values can be applied to
fasteners and parts.
1. Replace any fastener if corners of the head are worn.
2. Replace the washers if damaged.
3. Replace the gaskets, oil seals or grease seals at the time of
axle or carrier repair.
4. Clean the parts and apply new silicone gasket material where
required when the axle or carrier is assembled. Figure 4.7.
Figure 4.4
Figure 4.5
1003020a
ETCHING AND PITTING
1003021b
SPALLING AND FLAKING
Figure 4.6
4011973a
PINION AND
THRUST
WASHER
LONG
SPIDER
PIN
FLAT
BACKFACE
SIDE GEAR
AND THRUST
WASHER
SHORT
SPIDER
PIN
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