10.15
Section 10
Reassembly
10
Install Fan and Flywheel
WARNING: Damaging Crankshaft and
Flywheel can Cause Personal Injury!
Using improper procedures to install the flywheel can
crack or damage the cranksha and/or flywheel. This not
only causes extensive engine damage, but can also cause
personal injury, since broken fragments could be thrown
from the engine. Always observe and use the following
precautions and procedures when installing the flywheel.
NOTE: Before installing the flywheel make sure the
cranksha taper and flywheel hub are clean,
dry and completely free of lubricants. The
presence of lubricants can cause the flywheel
to be over stressed and damaged when the
mounting screw is torqued to specification.
NOTE: Make sure the flywheel key is installed
properly in the keyway. The flywheel can
become cracked or damaged if the key is not
properly installed.
NOTE: Always use a flywheel strap wrench or
flywheel holding tool to hold the flywheel
when tightening the flywheel fastener. Do
not use any type of bar or wedge between the
cooling fins or flywheel ring gear, as these
parts could become cracked or damaged.
1. Install the appropriate key into the cranksha
keyway. Based on cranksha keyway style, use
either a woodruff or straight key. Make sure key
is fully seated.
2. Install the flywheel onto the cranksha aligning
the keyway with the key. Be careful not to shi or
unseat the key.
3. Position the fan onto the flywheel, so the locating
pins drop into the corresponding recesses.
4. Install the fan mounting plate onto the fan,
aligning the four cutouts, followed by the heavy
flat washer and hex flange screw. See
Figure 10-50.
Figure 10-50. Installing Fan and Mounting
Hardware to Flywheel.
5. Use a flywheel strap wrench or holding tool
to hold the flywheel and torque the hex flange
screw. For an M10 screw, torque to 66.5 N·m
(49 . lb.). For an M12 screw, torque to 88.0 N·m
(65 . lb.). See Figure 10-51.
Figure 10-51. Torquing Flywheel.
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