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 164 of 779

b.

Removal.

Refer to Table 4-7 for figure

references and instructions pertinent to the

removal of the fuel injector nozzle and holder

assembly.

c.

Testing.

Note.

Before installing injector nozzle on

nozzle tester, thoroughly clean external area to

remove carbon and dirt. Do not allow dirt to

enter nozzle fuel inlet opening. For nozzles that

do not perform properly on nozzle tester refer to

paragraph 4-18 for disassembly sequence and

necessary procedures ‘required to assure a

properly functioning nozzle and holder

assembly.

(1)

Nozzle installation.

Mount the fuel

injector nozzle and holder assembly on the fuel

injector nozzle tester using nozzle attaching tube

-4910-795-7953. The tube should be connected

to the lower connection on the injector nozzle

tester. Close the pressure gage valve and actuate

the pump handle rapidly (approximately 2S

strokes per minute) to expel air from nozzle and

holder and to settle spring and nozzle holding

column.

(2)

Nozzle opening pressure.

Fill reservoir

with sufficient fuel to perform

test. Open

pressure gage valve and actuate tester slowly to

raise pressure. When nozzle opens, gage pressure

must be between 3050 psi (minimum), 3150 psi

(maximum). If this gage reading is not achieved,

nozzle

and holder assembly must be

disassembled and spring adjusting spacers (fig.

4-167) added or removed to obtain the proper

pressure reading.

Figure 4-167. Fuel injector nozzle and holder assembly—sectional view.

.

4-8 2