TM-9-2815-200-35

ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED ,12 - CYLINDER , ASSEMBLY ;MODELS AVDS-1790-2M (2815-856-4996), AVDS-1790-2A AND AVDS-1790-2AM (2815-856-9005)

TECHNICAL MANUAL; DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS

TM-9-2815-200-35 - Page 531 of 779

1. Slowly turn camshaft (A) clockwise, as viewed from

flywheel end, until No. 6R intake valve has just closed.

2. Closing point is determined by trying to rotate the swivel

pad (B) on the intake valve adjusting screw while the

camshaft is being rotated. The valve is closed the in-

stant the swivel pad is free to move.

Figure 7-24. Determining closing point o f

No. 6 intake valve .

Note.

Do not force camshaft drive shaft. The

shaft is machined with a 24-tooth spline on inner

end, and a 28-tooth spline on outer end. Thi s

difference in number of teeth provides a vernie r

effect which makes it possible to index the drive

shaft so it will engage the splines of the camshaft

drive gearshaft and camshaft drive beve l

gearshaft at some point within 360 degrees. An

accurat e

setting i s

then provide d

withou t

changing the relationship of the camshaft an d

crankshaft .

1. Maintain the position of camshaft as set in figure 7-24

and the crankshaft position set in figure 7-21.

2. Insert camshaft drive shaft (A), using mechanical

puller-5120-678-5282,

and

mate

splines

on

drive

shaft with splines in camshaft drive bevel gearshaft.

When splines of drive shaft do not mate with splines of

camshaft gearshaft, withdraw drive shaft and turn

slightly before again attempting insertion.

Note .

It may be necessary to repeat thi s

operation a number of times before splines wil l

mate and allow drive shaft to be inserted int o

position .

Figure

7-25.

Installing camshaft drive shaft .

7-19