TM 5-3810-306-34
k. Install spacer (23) on pinion (12) against
NOTE
inner bearing (20).
If press is not available, or if press
NOTE
does not have a pressure gauge, use
yoke or flange method to adjust
Spacer
(23)
controls
preload
preload.
adjustment of pinion bearings (20).
a. Place pinion (12) and retainer (21) in
l. Install outer bearing (20) on pinion shaft
press, gear head down.
(12) until bearing is flat against spacer
(23).
b. Install sleeve of correct size against inner
race of outer bearing (20).
NOTE
c. Apply and hold correct amount of pressure
Do not install gasket
(24)
until
to pinion bearings. See table.
bearing preload is set.
Pinion Shaft
Press Load
Thread Size
FT-LBS
KGM
2. ADJUST BEARING PRELOAD.
7/8
- 20
22,000
10,000
1
- 20
30,000
13,500
NOTE
1-1/4
- 12
54,000
24,500
1-1/2
- 12
54,000
24,500
1-1/2
- 18
54,000
24,500
torque of 5 to 45 in-lbs (5.76 to 51.8
1-3/4
- 12
54,000
24,500
2
- 12
50,000
22,700
condition should have a rolling
torque of 10 to 30 in-lbs (11.5 to 34.6
d. As pressure is applied, rotate retainer (21)
kgcm).
several times so that bearings make
normal contact.
PRESS METHOD.
e. With pressure being held, wrap a cord
around retainer (21) several times.
f. Attach spring seals to end of cord.
NOTE
Do not record the starting torque.
Record only the torque value after
retainer starts to rotate.
Starting
torque gives a false reading.
g. Pull end with scale on horizontal line. As
retainer (21) rotates, read and record
value indicated on scale.
8-22