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TM 5-4210-233-14&P-1
5-43. FORWARD TANDEM AXLE AND DRIVE UNIT-Continued
Example
Inch
MM
Thickness of Piece No.1
0.504
12.800
Thickness of Piece No. 2
0.506
12.852
Total Thickness
1.010
25.652
Divide By Two (2) To Get
Average Thickness
0.505
12.826
Add 0.004 inch (0.100 mm)
To Get Thickness of Spacer
0.509
12.926
(17)
Use a press and sleeve to completely install the helical gear (77) on the drive pinion (73). Sleeve
must fit inside of pinion bore. Press the gear (77) on drive pinion (73) unfit gear contacts spacer.
(18)
Install the correct size spacer (74) as determined above on shaft of pinion on top of helical gear
(79). Install the outer bearing cone (76) on drive pinion shaft (73).
(19)
Use a press to apply two tons of pressure on bearing cone (76) to press cone on shaft. Move the
differential carrier (9) in both directions to pivot carrier on drive pinion white installing cone to make
sure cone is correctly installed. Release the pressure, remove wood block and install carrier in the
stand.
(20)
Measure the outside diameter of the washer (72) and install washer
on drive pinion (73) and secure
with nut (71). Tighten nut (71) to a torque’s of 1200 to 1500 lb ft (1625 to 2035 N m).
(21)
Check preload of bearings.
(a) Wind a cord around the washer (72) under the nut (71) on the drive pinion (73). Attach a spring
scale to cord.
(b) Putt the spring scale in a horizontal direction white checking the reading on the spring scale.
Divide outside diameter of washer (72) by two to obtain radius dimension. Multiply radius by
reading on spring scale to get preload of bearings.
5-304
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