TM 10-4320-307-24
3-39
GEAR COVER ASSEMBLY INSPECT/REPAIR (CONT).
3.
Install crankshaft pulley (12) and vibration damper (13)
as follows:
a.
Install two guide studs (14) in crankshaft nose.
b.
Install pulley (12) and vibration damper (13) on guide
studs (14).
NOTE
Make sure the mounting surfaces of the
crankshaft nose, vibration damper and
pulley are clean, dry and free from burrs.
c.
Lubricate threads of capscrews (15) and face of
washers (16) with oil.
d.
Install four capscrews (15) and washers (1 6) hand
tight.
e.
Remove two guide studs (14) and replace with two capscrews (15) and washers (16).
f.
Tighten six capscrews (15) to 190 ft-lbs (260 N•m) torque.
4.
Check eccentricity of vibration damper (13) as follows:
a.
Install dial indicator to gear cover (17) and set plunger on edge of vibration damper (13). Rotate crankshaft and
record dial indicator movement
b.
Replace vibration damper if eccentricity exceeds 0.004 inch (0.10 mm) per 110 inch (25.4 mm) of damper
diameter.
5.
Check vibration damper (13) for wobble as follows:
a.
Install dial indicator on gear cover (17) and set plunger on front surface of vibration damper (13).
b.
Push crankshaft to front or rear.
c.
Rotate crankshaft 360 degrees, maintaining axial position of crankshaft, and record total dial indicator motion.
d.
Replace damper if wobble exceeds 0.007 inch (0.18 mm) per 1.0 inch (25.4 mm) of radius.
6.
Install fan drive and water pump drive pulleys in accordance with paragraphs 2-48 and 2-50.
7.
Install alternator drive belt in accordance with paragraph 2-41.
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