TM-9-2320-273-34

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

DECEMBER 1980
TM-9-2320-273-34

  TM-9-2320-273-34 - Page 498 of 801

TM 9-2320-273-34
11-16. Cleaning, Inspection, and Repair.
(Refer to para 11-6, 11-7, and 11-8.)
11-17. Differential Carrier Assembly.
a. Assemble Pinion and Cage.
Take care not to damage the bearing rib
in the cage.
(1)
Coat the bearings with gear lube (item 30, App B) and if new cups are to be installed, press
firmly against the pinion bearing cage shoulders.
(2)
press the rear (inner) bearing firmly against the pinion shoulder with a suitable sleeve that
will bear only on the bearing inner race.
(3)
Insert the pinion and bearing assembly in the pinion cage and position the spacer or spacer
combination over the pinion shaft.
(4)
press the front (outer) bearing firmly against the spacer.
(5)
Rotate the cage several revolutions to assure normal bearing contact.
(6)
While in the press, under pressure, check the bearing preload torque. Wrap a soft wire
around the cage and pull on a horizontal line with a pound scale.
(7)
If a press is not available, the pinion nut may be tightened to the correct torque and the
preload checked. The correct pressures and torque for checking the pinion bearing preload are as follows:
REQUIRED NUT
REQUIRED PRESSURE
PINION SHAFT
TORQUE TO OBTAIN
TO OBTAIN CORRECT
THREAD SIZE
CORRECT PRELOAD
PRELOAD
1 1/4 inch
x 12
700-900 Ib-ft (949-1220 N•m)
11 tons (10 metric tons)
NOTE
Use rotating torque, not starting torque.
(8)
if rotating torque is not within 20-45 lb-in (2.3-5.1 N•m) for new bearings, or 10-22 lb-in
(1. 1-3.4 N•m) for reused bearings, use a thinner spacer to increase or a thicker spacer to decrease the preload.
(9)
Press the yoke against the forward bearing and install the pinion shaft nut.
(10)
Place the pinion and cage assembly in the carrier and secure with capscrews and washers.
Hold the flange and torque the pinion shaft nut to 700-900 Ib-ft (949-1220 N•m). The yoke must be
held with a suitable tool or fixture to tighten the nut.
(11)
Recheck the pinion bearing preload torque. If rotating torque is not within 15-25 lb-in
(1.7-3.8 N•m), repeat the foregoing procedure.
11-52
CAUTION


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