TM 5-3810-306-34
h. Measure and record diameter of retainer where cord
YOKE METHOD
was wound. Measurement can be inches or centimeters.
CAUTION
Do not install tight fitting yoke on
shaft using a hammer or mallet.
Otherwise damage to yoke will result.
a. Install yoke (27), washer (15) and nut (14)
on pinion (12). Yoke (27) must be against
outer bearing (20).
NOTE
If required, use a press to install yoke
(27).
b. Install pinion (12) and retainer (21) in
housing (31) without shims (30).
c. Install eight capscrews (25) without
washers (26). Tighten capscrews hand
tight.
i. Calculate radius by dividing diameter by 2.
d. Attach yoke bar to yoke (27). Bar will hold
j. Calculate bearing preload as follows:
pinion (12) in position when nut (14) is
tightened.
Pounds pulled x radius = preload
e. Tighten nut (4) to correct torque value as
NOTE
follows:
Calculated preload will be in in-lbs if
Nut Size
Correct Torque
value recorded in step g is in in-lbs.
LB-FT
KGM
Likewise, preload will be in kg-cm if
7/8
- 20
200- 175
27.6- 38.0
recorded value is in kg-cm.
1
- 20
300- 400
41.4- 55.3
1-1/4
- 20
700- 900
96.8-124.4
k. If calculated preload is not within 5 to 45
1-1/4
- 18
700- 900
96.8-124.4
in-lbs (5.76 to 51.8 kgcm) for new
1-1/2
- 12
800-1100
1100.6-152.1
bearings or 10 to 30 in-lbs (11.5 to 34.6
1-1/2
- 18
800-1100
1110.6-152.1
kgcm) for used bearings, increase preload
1-3/4
- 12
900-1200
1124.4-165.9
by installing thinner bearing spacer (23).
2
- 12
1200-1500
1165.9-207.4
Decrease preload by installing thicker
bearing spacer (23).
f. Remove yoke bar.
l. Recheck bearing preload by performing
g. Attach torque wrench to nut (14).
steps a thru j.
8-24
