Figure 6-148. Front fan drive housing and mounting base

b. Cleaning. Refer to paragraph 6-2.

Due to design changes on the

Note.

c . Inspection and Repair. Refer to paragraph

mechanical clutch, two different size balls have

6-3 and 6-4, and (1) through (7), below.

b e e n used. Carefully inspect all balls and discard

(1) Fan driven gearshaft and fan drive bevel

any balls of 11 / 16 inch diameter. Overhaul

gearshaft. Inspect fan driven gearshaft (74.1,

clutch assembly using only the current 5 / 8 inch

fig. B-26) and fan drive bevel gearshaft (74.2,

diameter balls, FSN 3110-462-0392.

fig. B-26) to limits specified in overhaul stan-

(5) Drive hub. Inspect drive hub (41, fig.

dards (table 6-25).

B-27) or (46, fig. B-27) for raised metal surfaces,

N o t e . If either the fan driven gearshaft or the

l o o s e rivets, warpage or pitted surfaces caused by

fan drive bevel gearshaft require replacement,

ball wear. Check bearing surfaces against limits

both must be replaced as they are a matched gear

s p e c i f i e d in overhaul standards (tables 6-26 or 6-

set and cannot be replaced individually.

27). Repair metal sufaces by polishing pitted

areas smooth.

( 2 ) O i l s e a l . Replace the oil seal at each

(6) Clutch discs. Inspect clutch discs (48

overhaul.

a n d 49, fig. B-27) or 21, 22, 24, and 27, fig. B-

(3) H o u s i n g a s s e m b l y . I n s p e c t h o u s i n g

2 7 ) for cracks, warpage, wear, or other abrasive

assembly (50, fig. B-27) or housing assembly

dam age. Inspect for excessive heat distortion.

( 2 3 , fig. B-27) for loose dowel pins.

Repairs of clutch discs are not recommended.

(4) C l u t c h c o m p r e s s i o n s p r i n g s a n d b a l l s .

Replace discs if any of the above mentioned

I n s p e c t clutch compression springs ( 39, fig. B-

dam age is evident.

27) for weakness, broken coils, and distorted

( 7 ) Studs. Refer to paragraph 6-4e, table 6-

condition. C h e c k b a l l s ( 4 0 , f i g . B - 2 7 ) a n d

28 and figure 6-148 when replacing studs.

s p r i n g s to limits specified in overhaul standards

(tables 6-26 or 6-27).

Figure 6-148. Front fan drive housing and mounting base - studding

assembly.

6-126