TM 5-4310-387-14
5-27. Fuel Injector.
This task covers:
a.
Test
b.
Replace
INITIAL SETUP
Tools
Equipment Condition
General Mechanic's Tools Kit (NSN 5180-00-177-7033)
Fuel lines removed from injector (para. 4-24).
Injector Nozzle Tester (P/N 0031077)
Wrench, Torque (NSN 5120-00-554-7292)
Materials/Parts
Reference
Gasket
Appendix F Torque Values.
Fuel Injector
Rags, (Wiping, (Item 19, Appendix E)
a.
Test. (figure 5-37)
(1)
Remove fuel injector (para. b.).
(2)
Connect fuel injector (1) to tester (2).
(3)
Place drip pan under injector (1).
(4)
Close tester valve.
(5)
Pump the tester until the fuel injector (1) opens and sprays fuel.
(6)
Observe the pressure at which fuel injector (1) opens. Pressure should be 2845 psi (19616 Kpa).
(7)
Replace fuel injector (1) if pressure required to open fuel injector (1) is higher than 2845 psi (19616 Kpa).
(8)
Pump the tester to 2551 psi (17589 Kpa) and hold for 10 seconds. If pressure d
rops steadily or injector
leaks, replace injector.
(9)
Open valve, remove injector from tester.
(10)
Install fuel injector (para. b.).
5-80
