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 235 of 1563

TM 9-2815-220-24

INTAKE AND EXHAUST VALVE TIMING PROCEDURE

0035 00

TIMING CHECK (Continued)

3. Checking procedure.

a. Check valve timing by slowly rotating flywheel counterclockwise, as viewed from

flywheel end, until number 6R intake valve is just closed.

b. Closing point is determined by trying to rotate the valve adjusting screw pad (12) on the

intake valve adjusting screw (11) while the flywheel is being rotated.

c. Place a finger through the adjustment opening and rest it on the pad (12) to check for the

first instant of movement.

d. The valve is closed the instant the valve adjusting screw pad (12) is free to move.

11

12

4. Check valve timing.

a. Observe position of flywheel timing

mark "6R INT CLOSE .100 CLR" (A).

B

A

b. If timing mark (A) is aligned within

1/8 inch of engine timing mark (B), valve

timing is correct.

Go to step 4 of

Installation.

c. If timing marks (A and B) are not aligned

within 1/8 inch, the timing must be

adjusted.

Go to Timing Adjustment.

WP 0035 00-5