TM 9-2320-272-24-4
5-20. INJECTOR LEAK TEST
THIS TASK COVERS:
b. Testing Injector Plunger and Seat
a. Setting Up Injector Leakage Detector
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
TM 9-2320-272-24P
M939/A1
EQUIPMENT CONDITION
SPECIAL TOOLS
Injector leakage detector (Appendix E, Item 68)
Fuel injectors removed (para. 4-32).
TOOLS
General mechanic's tool kit (Appendix E, Item 1)
Feeler gauge
a . Setting Up Injector Leakage Detector
Set pressure regulator on leakage tester at 60 psi (414 kPa). Read pressure setting on pressure
1.
regulator gauge (1).
Operate retraction lever (3) on leakage tester three times, and reset pressure regulator gauge (1) at
2.
60 psi (414 kPa).
NOTE
Air pressure must be held at 60 psi (414 kPa) during all tests.
Place leakage tester retraction lever (3) in position A.
3.
Position load cell (2) on leakage tester.
4.
Adjust knurled knob (4) on load cell (2) until load cell (2) reads 200 psi (1,379 kPa).
5.
NOTE
Do not adjust locknut unless load cell is in use.
Place feeler gauge between knurled knob (4) and locknut (5) and adjust locknut (5).
6.
Remove load cell (2) from leakage tester.
7.
5-136
