TM 5-4310-452-14
5-19. FUEL INJECTOR MAINTENANCE (Con't).
c.
ASSEMBLY
1.
Insert flatwasher (11) and spring (12) into fuel injector (4).
2.
Insert plunger (13) with short side facing spring (12), into fuel injector (4).
3.
Install sleeve spacer (15) with straight pins (14) inserted in holes of fuel injector (4).
4.
Position fuel injection nozzle (17) in place on fuel injector (4) and install fuel cooling sleeve (16).
d.
TEST
1.
Install fuel injector (4) in tester.
2.
Open valve to pressure gage.
NOTE
When pressure is 363-435 psi (2503-3000 kPa) less than opening pressure, the nozzle should not
dribble.
3.
Pump tester until fuel injector (4) opens and sprays.
4.
Injector should open and spray at minimum pressure of 2537 psi (17593 kPa).
NOTE
If fuel injector opening pressure is not correct, perform steps 5 and 6.
5.
Add joint washers (5) to increase, or remove washers to decrease opening pressure.
6.
Repeat steps 1 through 4 and check spray pattern. Spray pattern should be solid with no mist around it. Nozzle
should not dribble when fuel injector (4) closes.
e.
INSTALLATION
1.
Install fuel injector (4) in cylinder head (6).
2.
Aline fuel injector (4) with fuel lines (3 and 9).
3.
install nut (10) on fuel injector (4).
4.
Install yoke (7) and nut (8) on cylinder head (6).
5.
Position fuel line (3) in place on fuel injector (4).
NOTE
Perform step 7 for cylinders 1 and 4 only.
6.
Position fuel return line (9) in place.
7.
Install fluid passage bolt (1) and 2 washers (2) in fuel injector (4).
FOLLOW-ON TASKS:
• Start engine and check for leaks (see paragraph 2-12).
• Shut down engine (see paragraph 2-13).
• Close left door assembly.
5-43
