TM 5-3895-359-14&P
ENGINE COOLING FAN
The engine cooling fan is belt driven from the crankshaft
Lubrication
pulley (Fig. 1).
The bearings and the cavity between the bearings are
The fan is bolted to a hub and pulley which is carried on
packed with grease at the time the fan hub is
two bearings. The bracket and shaft is mounted on the
assembled. A grease fitting is provided in the fan pulley
fan support which is in turn attached to the balance
hub. Refer to Page 10-11-3 for the maintenance
weight cover.
The bracket is slotted to permit
schedule.
adjustment of the fan belt tension by moving the bracket
and shaft on the attaching bolts. The pulley hub turns
Fan Belt Adjustment
on a tapered roller bearing at the rear and a ball bearing
on the front. The hub assembly includes a hub cap with
Adjust the fan belt(s) periodically as outlined on Page
relief valve, a dust cap and a grease fitting in the fan
10-11-3.
pulley hub (Fig. 2).
Remove and Install Fan Blades
The fan blades may be removed from the fan hub
assembly as follows:
1. Remove the four fan guard mounting bolts and move
the fan guard to the rear to gain access to the front of
the fan.
2. Remove the 6 fan mounting bolts and lockwashers
and remove the fan. The fan blades may be installed by
reversing the procedure used -for removal.
NOTE: When installing fan guard be
sure that it is positioned so that
there is equal clearance between the
tips of all blades and guard.
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 four fan guard mounting bolts and move
the fan guard to the rear to gain access to the front of
the fan.
2. Remove the attaching bolts, lock washers and nuts,
then remove the fan.
3. Remove the two adjusting bolts, lock washers and
plain washers, then remove the drive belts.
4. Loosen the adjusting bolts until the bracket is free.
Fig. 1 . Typical Fan and Fan Hub Assembly
Remove the hub and bracket assembly from the engine.
10-6-16
