Group 070
Cooling System
02
070
1
RG,RG34710,224 –19–17SEP02–1/5
Replace Bearings in Fan Drive Assembly
RG12423 –UN–17SEP02
Fan Drive Exploded View
A—Fan Hub/Pulley C—Snap Ring F—Bearing Housing (Fixed)
1
H—Pipe Plug
B—Grease Seal D—Ball Bearing (2 used) G—Bearing Housing I—Plug
E—Shaft (Adjustable)
Disassemble Fan Drive
1. Remove V-belts and remove fan.
2. Using a suitable puller, remove fan hub (A) from
shaft (E).
NOTE: ON engines with fixed fan drive assembly cast
into camshaft gear access cover, cover must
be removed from engine. (See REMOVE
TIMING GEAR COVER in Group 040.)
3. Remove fan drive assembly from engine.
NOTE: Early adjustable bearing housings (G) will use
threaded type pipe plug (H). Fixed bearing
housings (F) and later adjustable bearing
housings (G) will use press in type plug (I).
4. Remove pipe plug (H) or plug (I), grease seal (B),
and snap ring (C). Discard seal and snap ring.
5. Remove shaft with bearings (D) by lightly tapping
end of shaft (through pipe plug opening) with a
hammer and brass drift.
6. Remove bearings from shaft using a bearing puller.
Discard bearings.
7. Thoroughly clean and inspect shaft and bearing
housing (F or G) for cracks or any other damage.
Measure parts and compare with specifications
given below.
1
Bearing housing is cast into camshaft gear access cover.
CTM100 (06APR04)
02-070-1
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=285
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