TM 9-2320-272-24-4
5-32. FUEL INJECTION PUMP PRETEST (Contd)
I
f. Full Load Delivery
1.
Apply 131 psi (903 kPa) of air pressure to manifold pressure compensator (2).
2.
Adjust fuel pump (1) to 1,050 rpm.
3.
Position control lever (3) in full load position.
Take fuel draw and check delivery quantity. Correct fuel delivery quantity should be 8.90-9.28 in.3
4.
(145.8-152.1 cm3).
Allowable reading spread is 0.366 in.3 (5.998 cm3).
5.
6.
Close air supply source to manifold pressure compensator (2).
g. Manifold Pressure Compensator Test
1.
Set fuel pump (1) to 500 rpm and position control rack (5) at 0.038-0.039 in. (0.97-0.99 mm) control
rack travel.
2.
Apply 44 psi (303 kPa) of air pressure to manifold pressure compensator (2) and observe control
rack travel. Correct control rack travel is 0.432-0.436 in. (10.97-11.07 mm).
3.
Increased air pressure to 75 psi (517 kPa) and observe control rack travel. Correct control rack
travel is 0.476-0.488 in. (12.09-12.39 mm).
4.
Increase air pressure to 131 psi (903 kPa) and observe control rack travel. Correct control rack
travel is 0.504-0.508 in. (12.80-12.90 mm).
5.
Close air supply source to manifold pressure compensator (2).
h. Start Cut Out Test
1.
Set fuel pump (1) to 240 rpm and run fuel pump (1) at this speed for approximately one minute.
2.
Move throttle lever (4) to full load position and measure control rack travel. Control rack travel
should be no more than 0.084 in. (2.13 mm).
i. Fuel Delivery Test
1.
Apply 131 psi (903 kPa) of air pressure to manifold compensator (2).
Adjust fuel pump (1) to 700 rpm.
2.
3.
Set test stand to measure fuel delivery at 1,000 strokes.
Check fuel delivery quantity. Correct fuel delivery quantity should be 8.73-9.21 in.3 (143-150.9 cm3).
4.
5.
Check fuel spread. Correct fuel spread should be 0.427 in. (6.99 cm).
Decrease fuel pump rpm to 500.
6.
Check fuel delivery quantity. Correct fuel delivery quantity is 4.64-5.00 in.3 (76.0-81.9 cm3).
7.
Close air supply source to manifold pressure compensator (2).
8.
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