TIMING ADJUSTMENT (Continued) - TM-9-2815-220-240239

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TIMING ADJUSTMENT (Continued)

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TM-9-2815-220-24 Maintenance Manual for AVDS-1790 2CA 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

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TIMING ADJUSTMENT (Continued)

TM 9-2815-220-24

INTAKE AND EXHAUST VALVE TIMING PROCEDURE

0035 00

TIMING ADJUSTMENT (Continued)

CAUTION

Do not force shouldered shaft while installing. Damage to the shaft

and gears may occur. The shaft is machined with a 24-tooth spline on

inner end and a 28-tooth spline on outer end. The difference in the

number of teeth provides a vernier effect which makes it possible to

index the shouldered shaft so it will engage the splines of the inner

bevel gear shaft and the outer bevel gear shaft at some point within

360 degrees. An accurate installation is then provided without

changing the relationship of the camshaft and the crankshaft.

NOTE

It may be necessary to repeat the following operation a number of

times before splines will mate and allow shouldered shaft to be

inserted into position.

7. Insert shouldered shaft (22).

a. Maintain the position of camshaft assembly (23) and insert shouldered shaft (22), using

mechanical puller (20) (item 89, WP 0176).

b. Mate splines on lower (not illustrated) and upper (19) bevel gear-shafts.

c. If splines of shouldered shaft (22) do not mate with lower and upper bevel gear shafts,

withdraw shouldered shaft (22) and turn slightly before again attempting insertion.

WP 0035 00-9