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Figure 11F-17. Fan Hub and Adjusting Bracket Details
STANDARD BOLT AND NUT TORQUE SPECIFICATIONS

Maintenance Manual For 40 Ton Crane Crawler Mounted Page Navigation
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lock washers. Tighten the nuts to 15-19
6. Install
outer
(front)
bearing
lb-ft (20-26 Nm) torque.
assembly.
7. Secure the hub with the washer and
Install Fan, Hub and Bracket
bolt. Tighten the 1/2" - 20 bolt to 83-93
lb-ft (113-126 Nm) torque while rotating
1. Attach the fan
hub and adjusting
the pulley.
bracket assembly to
the support bracket
on the engine with
bolts, lock washers
8. Fill a new fan hub cap 75% minimum
and plain washers.
Do not tighten the
full of grease and install it in the end of
bolts.
the fan hub (pulley).
2. Install the drive belts and adjust the
NOTE
belt tension as outlined in the Operators
Manuals, Section V. Install the adjust-
The cap must not protrude beyond
ing bracket, bolt and plain washer.
the face of the hub.
3. Install the fan (and fan spacer) on
the hub and secure it with bolts and lock
9. Secure the fan blade and spacer to
washers.
the pulley hub with six bolts, nuts, and
11F-18


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