TM-5-4310-389-14
4-20. COOLING AIR BLOWER (ENGINE).
DESCRIPTION
This task covers: Replace. Repair.
INITIAL SETUP
Tools:
Equipment conditions:
Fixture 003-1189
Engine secured (paragraph 2-11).
Retaining ring set pliers
Vice
Materials/parts:
None
Slacken the fasteners securing the alternator, remove the V-belt, and remove the cooling air blower (figure 4-56).
REPLACE
a.
Unscrew securing bolt (10) and remove nut (1).
b.
Remove V-belt pulley (9), blower impeller (2), and bearing shaft (4).
c.
Remove circlip (8) and press out the two grooved ball bearings (5 and 7) and spacer sleeve (6).
REPAIR
a.
Renew the two grooved ball bearings and fill them with special high-melting-point bearing grease. Install the first
grooved ball bearing (7) to the rear with the enclosed side to the back.
b.
Insert the bearing shaft (4) in the grooved ball bearing and slide the space sleeve (6) on the bearing shaft.
c.
Half-fill the space between the distance sleeve and casing wall with special high-melting-point bearing grease.
d.
Press in the second ball bearing (5) so that the enclosed side faces the front. Install the circlip in the groove (8).
4-80
