TM 5-3895-346-14
ENGINE OVERHAUL
ENGINE COOLING FAN
prelubricated and requires no further lubrication.
Fan Belt Adjustment
Adjust the fan belts periodically as outlined in Preventive Maintenance.
Remove Fan, Hub, and Adjusting Bracket
The fan blades must rotate in a vertical plane parallel with and a sufficient distance from the radiator core.
Bent fan blades reduce the efficiency of the cooling system, may throw the fan out of balance, and are apt to
damage the radiator core. Before removing the fan, check the blades for alignment. Do not rotate the fan by
pulling on the fan blades.
1. Remove the fan belts and fan guards.
2. Remove the attaching bolts and lockwashers and remove the fan and spacer (if used).
CAUTION
If insufficient clearance exists between the fan and radiator, remove the fan, hub, and
adjusting bracket as an assembly.
3. Loosen the fan hub adjusting bracket bolts and remove the drive belts. Then withdraw the bolts and
washers and remove the hub and bracket assembly from the engine.
Disassemble Hub and Adjusting Bracket
IN-LINE ENGINES
(Ball Bearing-Type Hub):
1. Refer to Fig. 2 and measure the distance between the rear face of the rim on the pulley and the rear
face (machined) of the fan adjusting bracket. Record this measurement for reassembly purposes.
2. Remove the fan hub from the shaft with a puller as shown in Fig. 3.
3. Place the bracket assembly in an arbor press. Then place a suitable sleeve over the shaft and
against the outer race of the bearing and press the bearing and shaft assembly from the bracket.
CAUTION
Damage to the bearing will result if force is applied to the shaft.
IN-LINE ENGINES
(Roller Bearing-Type Hub):
1.
Refer to Fig. 4 and remove the fan
hubcap.
2. Remove the hub bolt and washer.
3. Withdraw the hub and bearing assembly
from the shaft. It may be
Figure 3. Removing Fan Hub (Pulley)
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