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 521 of 779

(b) Coat pistons with lubriplate or engine

oil and stagger the four piston ring gaps 9 0

degrees apart .

(2)

Cylinder assemblies .

Note.

For instructional purposes, the in -

stallation of only one cylinder assembly i s

described. The remaining cylinder assemblie s

should be installed in the same manner .

Note.

Wash cylinder bores thoroughly jus t

prior to engine assembly, using a power brush

with hot (160 F) soap water. Cylinder bore s

should then be oiled to prevent rust .

(a) Rotate engine overhaul stand unti l

right bank cylinder holes, with connecting rod

protectors, are positioned to receive cylinde r

Nos. 1R through 6R .

(b) Install piston with rings in cylinde r

and cylinder assemblies on crankcase following

instructions which accompany figures 7-12 and

7-13 .

1. Install piston and rings (A) in cylinder assembly using

compressor and gage-4910-795-7956. The piston

position number (fig. 7-11) must always correspond to

the cylinder number marked on intake valve side of

valve rocker arm cover flange. The arrow on the piston

boss must he directed toward the exhaust port outlet.

Guide piston and rings into cylinder until all piston

rings have entered the cylinder bore. Slide the com-

pressor

from piston and ring assembly. Install

remaining pistons in cylinders in the same manner.

2. Install new preformed packing (B) on each cylinder base

making sure that packing is not twisted or otherwise

improperly seated.

Figure 7-12. Installing piston in cylinde r

assembly using compressor an d

gage-4910-795-7956 .

7-9