TM 5-3810-300-24&P-3
5.4 FAN
Fig. 6 - Installing Adjusting' Bracket and Bolt on Fan
Shaft
inner race and revolve the outer race of each bearing
slowly by hand. If rough or tight spots are detected
replace the bearing. Examine the fan blades for cracks.
Fig. 7 - Shaft Type Fan Hub Assembly
Replace the fan if the blades are badly bent, since
straightening may weaken the blades, particularly' in the
6. Insert the bracket pivot bolt with lock washer
hub area.
through 21/32" hole in the bracket with head of bolt at the
front side of bracket (Fig. 6).
Remove any rust or rough spots in the grooves of the fan
7. Support the forward end of shaft on the plate of the
pulley and crankshaft pulley. If grooves are damaged or
arbor press. Start the bracket straight on the shaft and,
severely worn replace the pulley.
using a sleeve, press the bracket into place in manner as
shown in Fig. 6.
Assemble Fan, Hub and Bracket (Former)
8. Install the retaining ring on the end of the shaft.
9. Install the cap in the fan hub.
Lubricate ball, straight or tapered roller bearings with
10.
Secure the fan blade to the hub with the six
Chevron BRB No. 2 grease or an equivalent Lithium
bolts, nuts and lock washers.
base multi-purpose grease.
Assemble Fan, Hub and Bracket (Current)
1. If the inner race of roller bearing was removed, start
a new bearing straight on the short journal end of the
Lubricate ball, straight or tapered roller bearings with
shaft.
Chevron BRB No. 2 grease or an equivalent Lithium
base multi-purpose grease.
Then press the bearing inner race tight against the
shoulder on the shaft.
Assemble the fan hub and bracket shown in Figs. 7 and
2. Install the snap ring.
8 as follows:
3. Insert the shaft and roller bearing into the flanged
end of pulley hub and pack the cavity with grease.
1. Apply grease to the rollers of both bearings before
4. Start the ball bearing shaft straight on the long
installing them in the fan hub (pulley).
journal end of the shaft. Place the hub in an arbor press
with the forward end of the shaft resting on plate and,
using a sleeve over rear end of the shaft, press the
bearing tight against shoulder on the shaft.
5. Install the retaining ring in hub.
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