TM 9-4940-549-14&P
Use a feeler gauge to check crankshaft end thrust clearance on
(9)
center main bearing. End thrust clearance shall be 0.0050 to
0.0100 inch.
(10)
If end thrust clearance is not as specified, remove center main
bearing and polish sides on a piece of crocus cloth. Clean to
remove abrasive residue and apply a liberal coating of engine
lubricating oil before installation.
(11)
Apply a liberal coating of engine lubricating oil to cylinder
bores, pistons, piston rings and piston pins.
NOTE
Proper position of the oil ring gap
is with the gap aligned with either
piston pin hole.
(12)
Position piston rings so that no two gaps are aligned.
Use care to insure that connecting
rod is properly aligned with crank-
shaft connecting rod bearing journal
and that the precombustion chamber
is away from the camshaft side of the
engine.
With piston rings compressed, use a hammer handle or wooden
(13)
dowel to force piston down into cylinder bore.
(14)
When entire piston is in cylinder bore, insert upper half of
connecting rod bearing (7, figure 12-11) and pull connecting
rod down to crankshaft.
(15)
Place a short strip of plastic gauge on crankshaft and install
lower half of connecting rod bearing, connecting rod cap (4)
and screws (3). Torque screws to 70 lb-ft.
(16)
Remove screws and connecting rod bearing cap to remove plas-
tic gauge.
(17)
Check plastic gauge against standard to determine bearing clear-
ance. Clearance shall be 0.0010 to 0.0030 inch.
(18)
When clearance is established, install lower bearing half, bear-
ing cap and screws (step 16, above).
(19)
Install timing gear housing and assembly.
Install cylinder head and rocker arm assembly.
(20)
(21)
Install fly wheel and flywheel housing.
12-37
