TM-9-2320-272-24-4
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 4 OF 4
JUNE 1998
TM-9-2320-272-24-4 - Page 148 of 836
TM 9-2320-272-24-4
5-22. INJECTOR TEST STAND CALIBRATION
THIS TASK COVERS:
a. Setting Up Injection Tester
b. Test Stand Calibration
INITIAL SETUP:
APPLICABLE MODELS
TOOLS
M939/A1
General mechanic’s tool kit (Appendix E, Item 1)
SPECIAL TOOLS
REFERENCES (TM)
Fuel injection tester (Appendix E, Item 49)
TM 9-2320-272-24P
a. Setting Up Injection Tester
1.
Rotate counter wheel (2) on injection tester until wheel marks and pointer are aligned.
2.
Open hydraulic valve (3).
CAUTION
3.
4.
5.
6.
Never operate test stand with load cell in position.
Position load cell tester on injection tester and secure by opening air valve (4).
Adjust air regulator (5) by turning knurled knob (7) until load cell tester registers within coded
range markings. Record air gauge (1) pressure reading.
Lock air regulator (5) in place with locknut (6).
Place air valve (4) to center position and remove load cell tester from injection tester.
5-142
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