TM 9-2320-272-24-4
5-37. FUEL INJECTION PUMP CALIBRATION (Contd)
NOTE
Steps 10 through 13 pertain to adjusting one cylinder. Remaining
five cylinders are adjusted the same.
Remove fuel test line (12) from delivery valve holder (11).
10.
Loosen three nuts (10) and remove two shims (2) between barrel (9) and fuel pump (8). Discard
11.
shims (2).
CAUTION
Adjusting shims of the same thickness must be used on both sides
of barrel. Failure to do so may result in inaccurate prestroke
measurement.
NOTE
Refer to TM 9-2320-272-24P to select shims.
Install two new shims (2) between barrel (9) and fuel pump (8).
12.
Tighten three nuts (10) and install fuel test line (12) on delivery valve holder (11).
13.
NOTE
Cylinder number one is located at drive end of fuel pump.
14.
Close all bleedoff valves (1) except for cylinder number one.
Apply 435-464 psi (2,999-3,199 kPa) of calibration fluid pressure.
15.
NOTE
Ensure a steady stream of calibration fluid flows from number one
bleedoff valve. If not, increase calibration fluid pressure until a
steady stream of calibration fluid is obtained.
16.
Manually rotate test stand driveshaft (7) in correct fuel pump (8) rotation, until calibration fluid
starts to drip from bleedoff valve (1).
Check prestroke measurement. Correct measurement should be 0.360-0.480 in. (9.14-12.19 mm).
17.
18.
Remove dial indicator (3) and plunger lift device (4) from fuel pump (8).
Install new copper washer (6) and plug (5) on fuel pump (8).
19.
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