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 238 of 1563

TM 9-2815-220-24

INTAKE AND EXHAUST VALVE TIMING PROCEDURE

0035 00

TIMING ADJUSTMENT (Continued)

WARNING

Hold wrench securely when turning camshaft as spring pressure from

the valve springs can throw the wrench from your hand and cause an

injury.

CAUTION

Move the camshaft slowly and do not force the camshaft or damage to

engine may occur.

It may be necessary to turn camshaft

counterclockwise a small amount before valve closing point can be

determined by turning the camshaft clockwise.

5. Position camshaft assembly (23).

a. Using 5/8-inch wrench, affixed to

camshaft beveled gear (24), slowly turn

camshaft assembly (23) clockwise, as

viewed from flywheel end, until

number 6R intake valve is just closed.

12

11

23,24

b. Closing point is determined by placing a

finger on the valve adjusting screw

pad (12) of the intake valve adjusting

screw (11) and trying to rotate it while

the camshaft is being rotated.

c. The valve is closed the instant the valve

adjusting screw pad (12) is free to move.

6. As a second check, the scribed tooth (A) on camshaft beveled gear (24) should point down

toward the crankshaft.

WP 0035 00-8

24

A