DETROIT DIESEL 53
5.4
Fan
The shaft and bearing assembly are permanently
sealed and required no lubrication.
IN-LINE ENGINES (CURRENT):
Assemble the fan hub and spindle shown in Fig. 5 as
follows:
1. Apply Chevron BRB No. 2 grease or an equivalent
performance grease to the rollers of both bearings
before installing them in the fan hub (pulley).
2. lnstall the inner bearing with the protruding face of
the inner race facing outward from the hub.
3. Install a new seal with the felt-side flush with the
outer edge of the hub.
4. Place the hub over the spindle and install the
hearing spacer
5. Pack the cavity approximately 1/4 full with grease
and install the grease baffIe.
6. Place the shims against the bearing spacer. Then
Install the outer bearing with the protruding face of
the inner race facing outward from the hub.
7. Place the retaining washer with the breakout side
toward the bearing. Install and tighten the bolt to 83
93 lb-ft torque while rotating the pulley.
8. Check the end play in the assembly with the spindle
(shaft) in a horizontal position. The end play must be
within .001" to 006". If necessary, remove the bolt,
washer and outer bearing and adjust the number and
thickness of shims to obtain the required end play.
Shims are available in ,015", ,020" and .025"
thickness. Then reassemble the fan hub and check the
end play.
9. Fill a new fan hub cap 3/4 full of grease and install
it in the end of the fan hub (pulley).
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