FUEL INJECTOR TESTING.

TM 9-2815-224-34&P

Fuel Injector Maintenance Instructions (Cont)

Put injector assembly (22) in injector tip gage and adjust dial to zero.

(33)

Rotate injector assembly (22) 360. If total runout exceeds 0.008-in. (0.203 mm), do steps35)

(

(34)

through (38). If runout is less than 0.008-in., go to follow-on maintenance.

Remove injector assembly (22) from injector tip gage. Loosen injector nut (21), using injector nut

(35)

socket, and center spray tip (20).

CAUTION

Some injector nuts (21) and injector bodies (2) could have a blued or non-blued

finish. These parts are fully interchangeable, however. To avoid parts damage due

to overtightening, the correct torque values listed below must be used.

(a) Torque a non-blued injector nut (21) on a non-blued injector body (2) to 50

lb-ft (68 Nm).

(b) Torque a blued injector nut (21) on a blued injector body (2) to 80 lb-ft (108

Nm).

injector nut (21) on a non-blued injector body (2) to 65 lb-ft (88 Nm).

(36) Tighten injector nut (21).

(37) Check spray tip again, following procedures in steps(33) and (34).

(38) Replace injector nut (21) if spray tip (20) cannot be positioned correctly.

f . Follow-on Maintenance. Test fuel injector (para 12-4).

END OF TASK

FUEL INJECTOR TESTING.

12-4.

This task covers:

c. Follow-on Maintenance

a. Set-Up Injector Test Kit

b. Testing

INITIAL SETUP

Special Environmental Conditions

Models

Work in clean, well-ventilated work area.

All

General Safety Instructions

Test Equipment

None

Fuel and test oil are very flammable and

Special Tools

can explode easily. To avoid serious injury

Rack tester kit J22396

or death, keep fuel away from open fire and

Spray tip gage J9462-02

keep fire extinguisher within easy reach

Injector test kit J23010 or J23010-A

when working with fuel.

When working with fuel, post signs that

Supplies

read "NO SMOKING WITHIN 50 FEET."

Oil, test, fuel injector, Item 49, Appendix C

When testing or adjusting fuel injectors, do

Personnel Required

not place hands or arms in front of injector

MOS 63W, Vehicle wheel repairer

spray tip.

References

The fuel spray from an injector has

None

sufficient penetrating power to puncture

the flesh and destroy tissue. Should the fuel

Equipment Condition

enter the blood stream, it can cause blood

Condition Description

TM or Para

poisoning.

Fuel injector on clean

Level of Maintenance

work surface.

General Support

12-21

Change 2