TM 9-2320-272-24-4
5-36. FUEL INJECTION PUMP MAINTENANCE (Contd)
e. Leakage Test
CAUTION
Plungers and barrels are matched sets. Do not interchange parts
or damage to fuel pump may result.
NOTE
Barrels must be installed (subtask f) to perform this task.
Position fuel pump housing (1) bottom side up in vise.
1.
Install six plungers (4) in mating barrels (7). Position plunger (4) so groove (5) on plunger (4) points
2.
away from rack.
Install plunger retainer tubes (2) on fuel pump housing (1) with two bottom cover screws (3).
3.
Remove fuel pump housing (1) from vise.
4.
Install screw plug (8) in fuel gallery outlet (9).
5.
Connect air hose to fuel gallery inlet (6).
6.
Submerge fuel pump housing (1) in clean test oil bath and pressurize fuel pump housing (1) to
7.
75 psi (517 kPa).
Check for bubbles at top and bottom of fuel pump housing (1). Any bubbles, other than small
8.
bubbles from inside of plunger retainer tubes (2), indicate a leak.
If leaks are present, replace fuel pump housing (1).
9.
Disconnect air hose from gallery inlet (6).
10.
Remove screw plug (8) from gallery outlet (9).
11.
Remove two bottom cover screws (3) and plunger retainer tubes (2) from fuel pump housing (1).
12.
Remove six plungers (4) from barrels (7).
13.
Remove fuel pump housing (1) from vise.
14.
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