Overhaul of Engine Cooling Fan and Associated Parts

6-48. Overhaul of Engine Cooling Fan

housing were removed during disassembly,

and Associated Parts

C h a p t e r 5. Disassemble cooling fan following

a. Dissassembly. The cooling fan vane and

instructions which accompany figure 6-225.

Disassemble

1. Position cooling fan hub (B) inside of fan marked

1. Remove 16 cotter piss, slotted nuts (A), flat washers,

"TOP".

and cap screws attaching cooling fan hub to fan.

2. Install 16 cap screws, flat washers, slotted nuts (A),

2. Separate fan from hub (B).

and cotter pins securing fan to hub.

Assemble

Note. The machined face of the fan is marked

"TOP" to insure correct assembly.

Figure 6-225. Disassembling or assembling cooling fan and cooling fan hub.

b. Cleaning. Refer to paragraph 6-2.

d . Repair. R e p a i r s c r a t c h e s , n i c k s , a n d r a i s e d

c. Inspection. Inspect cooling fans using a

metal using a fine mill file.

m a g n i f y i n g glass under a strong light. Inspect for

Note. Care must be taken when using a file,

nicks, scratches, and cracks. A radial crack in

n o t to remove excessive amounts of metal since

area of a bolt hole is sufficient cause for

t h i s will disturb the delicate balance of the fan.

r e p l a c e m e n t of the fan. Discard cooling fans that

e. Assembly. Refer to figure 6-225. The

have bent, broken, or warped blades. Replace

c o o l i n g fan vane and housing will be assembled

fan when bolt holes are elongated or show

during engine assembly, Chapter 7.

evidence of wear. Replace fan when erosion of

t h e leading edge of the fan blade exceeds 25 or

of the total blade width.

6-190