TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TM-9-2815-220-24 - Page 1181 of 1563

TM 9-2815-220-24

CRANKSHAFT REPLACE/REPAIR

0139 00

INSTALLATION (Continued)

13

4. Install main bearing caps (6).

a. Install seven lower main bearing

halves (13) into main bearing caps (6) in

accordance with respective location

marks.

6

A

b. Coat mating surfaces (A) of main

bearing (6) caps, crankcase webs (B), and

lower main bearing halves (13) with

lubricant (item 21, WP 0173).

A

6

B

A

A

CAUTION

Main bearing caps and bearing halves must be installed in their

original position.

The side of each main bearing cap that is marked as

"fly end" must be installed toward rear of crankcase (flywheel end).

Failure to comply may result in premature failure.

10

28

6

c. Place main bearing caps (6) over

crankcase studs (28) and lower into

position.

d. Use jackscrew (10) (item 110, WP 0176)

to spread crankcase just enough so that

each bearing cap (6) will slide into

position.

Jackscrew must be repositioned

for each bearing cap location.

e. Remove jackscrew (10).

WP 0139 00-19