TM 55-1930-209-14&P-21
Figure 6-31. Crankshaft Critical Loading Zones.
(11)
Install rear oil seal sleeve as follows:
(a)
Stone high spots from oil seal contact surface of crankshaft.
(b)
Coat area of shaft, where sleeve will be positioned, with shellac or an equivalent sealant.
(c)
Press sleeve squarely on shaft with crankshaft oil seal installation tool.
(d)
Wipe off all excess sealant.
(12)
Inspect oil pump drive gear and crankshaft timing gear for worn or chipped teeth.
(13)
Refer to Table 1-1 for dimensions and measure the main bearing inserts for excessive wear. Visually
inspect bearings for wear to determine if used bearings are satisfactory for further service. Lower main bearings, which
carry load will normally show signs of distress before upper shells do.
(14)
Refer to Table 1-1 for dimensions and measure thickness of bearing shell 90° from the parting line, using a
micrometer with a ball attachment.
6-41
Crankshaft and main bearing reassembly and installation
a.
Reassembly
(1)
Install oil pump gear on the crankshaft if it was removed.
(2)
Install Woodruff key in keyway on crankshaft.
(3)
Install timing gear on crankshaft (with timing marks facing out).
(4)
Install six bolts and lockwashers. Start screws through gear into crankshaft. Then draw gear up tight
against shoulder on crankshaft. Tighten bolts to 35-49 lb ft torque.
6-73
