MAIN BEARING AND CRANKSHAFT REPAIR (CONT) -726030079

TM 9-2320-360-34-2

19-8.

MAIN BEARING AND CRANKSHAFT REPAIR (CONT)

(10) Inspect crankshaft rear main bearing thrust

surfaces (11) for grooving. Replace crankshaft

(1) if deep grooves are present in thrust

surfaces.

(11) Inspect timing gear (12) for chipped teeth.

Replace if damaged.

(12) Measure and note thickness of two lower thrust

bearings (13).

NOTE

Refer to table 19-1 for steps (13)

thru (15).

Refer to table 19-2 for steps (16)

and (17).

Refer to table 19-3 for steps (18)

thru (21).

(13) Measure diameter of five main bearing journals

(14) at several different spots.

(14) Measure diameter of four connecting

rod

journals (15) at different spots on each.

(15) Replace crankshaft (1) if journals (14 and 15)

are outside limits shown in table 19-1.

(16) Measure width of connecting rod journals (15).

(17)

Replace crankshaft if journals (15) are outside

limits shown on table 19-2.

(18) Add together thickness of two lower thrust

bearings measured in step (12).

(19) Subtract total in step (18) from 0.244 in. (6.20

mm).

(20) Subtract result in step (19) from crankshaft end

play measured in removal, step (4).

(21) Find amount of crankshaft end play from step

(20) in table 19-3 and read what size thrust

19-64