TM 9-2320-272-24-4
5-37. FUEL INJECTION PUMP CALIBRATION. (Contd)
j . Fuel Breakaway Test
1.
Move control lever (3) to full load position.
2.
Gradually increase rpm of fuel pump (1) rpm until control rack (5) moves 0.004 in. (0.1 mm)
towards shutoff.
3.
Rpm of fuel pump (1) should be 1,090-1,100 rpm. Perform step 5 if correct rpm is not obtained.
4.
Move control lever (3) to full load position and observe travel of control rack. Correct control rack
travel should be 0.464 in. (11.79 mm).
5.
If breakaway is not as specified rpm, adjust high-speed stopscrew (7) until correct breakaway is
obtained.
k. Starting Fuel Delivery Test
1.
Set fuel pump (1) to 100 rpm.
2.
Set test stand to measure calibration fluid at 1,000 strokes.
3.
Position throttle lever (6) so control rack (5) is at full load 0.827 in. (21 mm).
Take fuel draw and check delivery quantity. Correct delivery quantity is 12.94-13.91 in.3
4.
(212.0-228.0 cm3).
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