Section XXV. Repair of Fan, Fan Hub, and Bracket Assembly

*TM 9-2815-213-34

Section XXV. Repair of Fan, Fan Hub, and Bracket Assembly

3-137. Disassembly

c. Install pipe plugs in housing. Seal plugs with

(fig. B23).

sealing tape or sealer to prevent leaks.

d. Install rear bearing inner race with largest inside

a. Remove six cap screws (1) and lockwashers (2)

diameter into rear of fan hub and press new oil seal into

securing fan (3) fan spacer (4) pilot spacer (6) to seven

housing flush with bore.

sheave pulley (11).

e. Install shaft through oil seal and bearing inner

b. Pull cotter pin and remove nut (7) washer (8)

race. Seat with light tapping of a soft hammer or press.

from shaft (13).

f. Fill cavity between bearings to % full of GAA.

c. Press shaft from pulley.

g. Install front bearing,

clamp washer,

and

d. Remove bearings (9) and oil seal (12).

retaining nut.

e. Using suitable puller remove bearing outer races

h. Slowly rotate housing around spindle and at the

(10).

same time tighten retaining nut until a small "drag" is felt

during rotation of housing.

3-138. Cleaning

Clean all components in accordance with procedures in

CAUTION

paragraph 2-5.

Hub must be rotated while nut is being

tightened. Failure to rotate hub will

3-139. Inspection

result in excessive end play.

a. Inspect bearing cone and rollers, and tape roller

bearing cup (rear). Replace if damaged, rough or worn.

i. Tap fan hub assembly lightly with a soft hammer

b. Inspect threads for stripped or crossed threads.

to relieve clearances. Check shaft end clearance. It

Replace all damaged parts.

must be 0.001/0.007 inch and the hub must rotate freely.

c. Inspect fan hub nut, idler seal, and idler fan hub

Loosen or tighten nut and repeat step h above, if

shaft for damage or wear. Replace if damaged or worn.

required. Lock retaining nut with cotter pin.

d perform general inspection in accords with

j. Apply GAA to outer bearing. Assemble new

paragraph 2-6.

gasket, spacer, and fan to pulley assembly with

lockwashers and cap screws.

3-140. Repair

Repair of the assembly is limited to the instructions in

3-142. Installation

paragraph 2-7.

a. Install fan assembly bracket on block (fig. 24)

3-141. Assembly

and secure with six cap screws and lock- washers.

b. Position flatwasher on shaft and insert shaft in

CAUTION

bracket. Secure with flatwasher and lock nut.

Aline shaft in bearing before pressing.

c. Install adjusting bolt in bracket and through

Use only enough pressure to slide

shaft.

bearing over the shaft.

d. Set hydraulic pump drive belt on inner sheave,

and two alternator drive belts on next two sheaves.

a. Using suitable arbor press install o races of

e. Install three drive belts from crankshaft drive

tapered bearings into fan hub hour with cupped area up.

pulley to three outer sheaves of fan drive pulley.

Outer races must against shoulders provided in housing.

b. Pack bearing cones of both bearings 'with GAA.

Section XXVI. Repair of Hydraulic Pump and Mounting Bracket

to the using unit without the pump assembly.

NOTE

If engine is received for repair without

3-143. Disassembly

the power steering pump (hydraulic

pump), bracket, pulley and drive belt,

(fig. B-26).

a. Remove swivel elbow (7) and nipple (6).

do not requisition these items for instal-

b. Remove adapter (10) bushing (9) and elbow (8).

lation on the repaired engine. The re-

paired or rebuilt engine will be shipped

3-55