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 234 of 1563

TM 9-2815-220-24

INTAKE AND EXHAUST VALVE TIMING PROCEDURE

0035 00

TIMING CHECK (Continued)

1. Turn crankshaft until valves (7,8) are closed

and camshaft lobes (9) are pointing towards

cylinder base as shown.

9

8

7

NOTE

Standard intake valve clearance is

set to 0.010 inch (0.254 mm); when

checking valve timing, this

clearance is increased to 0.100 inch

(2.54 mm).

2. Adjust intake valve (8) clearance for timing check (0.100 inch, or (2.54 mm).

a. Loosen intake valve adjusting screw lock nut (10).

b. Turn valve adjusting screw (11) until clearance between valve adjusting screw pad (12)

and valve stem is 0.100 inch using thickness gauge blade (13) (item 57, WP 0176).

Gauge

blade must move through clearance with a slight drag.

c. Check position of valve adjusting screw pad (12) to make sure seat is flat on valve stem.

d. Torque lock nut (10) to 200-225 inch-pounds (22.6-25.4 N

•

m) after correct adjustment is

made.

Make certain setting has not changed after tightening lock nut (10).

8

13

12

10

11

WP 0035 00-4