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 520 of 779

Figure 7-11

7-8.

Pistons and Pins, Cylinde r

Crankshaft Damper and Oi l

Assemblies, Cylinder Air Deflectors ,

Filter Housing, and Oil Pa n

Refer to Table 7-4 for illustrations and assembly instructions. References are listed i n

the table .

Table 7-4. Pistons and Pins, Cylinder Assemblies, Cylinder Air

Deflectors, Crankshaft Damper and Oil Filter Housing, and Oil Pan

Component

References

Pistons and Pins and Cylinder Assemblies

Para 7-8a, Figs. 7-11 through 7-13, 5-144, 5-143

Cylinder Air Deflectors

Para 7-8b, Figs. 5-142, 5-141

Crankshaft Damper and Oil Filter Housing

Para 7-8c, Figs. 5-139, 5-138

Oil Pan

Para 7-8d, Figs. 4-125, 5-137 through 5-135, 6-78, 6-80

a. Pistons and Pins and Cylinder Assemblies .

Refer to the instructions given in (1) and (2) ,

below .

(1)

Pistons.

(a) The pistons are marked for iden -

tification as shown in figure 7-11 to aid in in -

stalling the pistons in their proper position. The

piston boss is stamped with an arrow and th e

cylinder location (1R) to identify the cylinde r

from which the piston was removed and to assure

piston will be returned to its original cylinder .

The arrows on the piston pin bosses are pointed

up, or to the exhaust outlet port. Cylinders are

stamped with piston markings at the intake valve

side (bottom) of valve rocker arm cover flange .

Markings of any piston or cylinders must b e

renewed if position marks and / or arrows ar e

not entirely legible. Replacement piston must be

marked to the corresponding cylinder it is to be

used with. At engine overhaul, all 12 pistons and

pins are matched according to weight and cannot

vary more than 5 oz .

Always keep piston pi n

with its respective pin .

7-8