Install the Pinion and Cage Assembly

TM 9-2320-303-24-2

REAR-REAR AXLE DIFFERENTIAL CARRIER REPAIR - CONTINUED

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DIFFERENTIAL CARRIER ASSEMBLY - CONTINUED

Install the Pinion and Cage Assembly.

Original Gear Set.

(1)

(a) If the original pinion shaft (25) and ring gear (8) are to be reassembled into the carrier (15), use the

same shim pack (12), if reusable, between the pinion bearing cage (26) and the carrier. Otherwise, use

a new shim pack of the same thickness.

NOTE

Use a minimum of three shims per pack.

(b) Install the correct shim pack (12). Locate thin shims on both sides for maximum sealing ability.

mallet.

(d) Install washers (18) and capscrews (19). Torque to 85-115 lb-ft (1 15-156 Nm).

NOTE

After the differential and gear assembly is installed into the carrier, make a gear tooth contact check.

New Gear Set.

(2)

NOTE

If the pinion or drive gear require replacement, both must be replaced in matched sets.

(a) Before installing a new pinion and gear set, check and compare the matching number of both the pin-

ion and drive gear; they must be the same. An example of this number would be M29 or any combina-

tion of a letter and number marked on the nose of the pinion and on the front face of the drive gears.

NOTE

All amboid pinions have a nominal mounting distance and a plus or minus variation indicated as PC (pinion

cone) marked in the same area. An example of these numbers would be 7.875 PC + 5. The PC number indi-

cates the variation in thousandths from the nominal mounting distance for that specific gear set.

(b) To determine the proper shim pack (12) thickness to be used with a new pinion and gear set, use one

of the following procedures (c or d) as applicable.

Adjust the Pinion Cage Shim Pack Thickness without Pinion Setting Gage.

(1)

Measure the thickness of the original shim pack used with the gear set being replaced; use a micrometer or

vernier gage. Make a note of this measurement.

(2)

Note the PC or variation number on the original pinion being replaced. If this number is a plus (+) value,

subtract it from the original shim pack measurement taken in step (1). If the variation number is a minus

(-) value, add it to the measurement from step (1). Make a note of this value.

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