TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TM-9-2815-220-24 - Page 925 of 1563

TM 9-2815-220-24

FUEL INJECTION NOZZLE REPLACE/REPAIR

0114 00

TEST (Continued)

5. Close pressure gauge valve (17) and actuate the pump handle (18) rapidly (approximately 25

strokes per minute) to expel air from nozzle assembly (3).

6. Check valve opening pressure.

a. Open pressure gauge valve (17) and actuate tester slowly to raise pressure.

When nozzle

opens, gauge (19) pressure must be between 3550 and 3650 psi (24476-25166 kPa)

(maximum).

b. If the proper gauge reading is not achieved, nozzle assembly (3) must be disassembled and

spring adjusting shims added or removed to obtain the proper pressure reading.

Perform

"DISASSEMBLY" and "REPAIR," then repeat "TEST".

7. Check nozzle spray pattern.

a. Close pressure gauge valve (17) and actuate tester at approximately 15 strokes per minute.

b. The spray pattern must have eight individual sprays.

The amount of spray from each must

be uniform, and angles between the sprays must be uniform.

c. If spray pattern is not acceptable, disassemble, clean and flush each nozzle hole thoroughly

(go to "DISASSEMBLE" and to "REPAIR").

Reassemble and repeat test.

17

14

3

19

15

18

WP 0114 00-5