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TM 9-4110-257-14
WARNING
Before applying pressure to the gauge, be sure that all connections are tight, and
that the fittings are not damaged. Fluid escaping from a very small hole can be
almost invisible. Use a piece of cardboard or wood, rather than hands, to search
for suspected leaks.
(10) Monitor the pressure gage reading and slowly turn the engine flywheel (20) clockwise. Note the maximum
pressure indicated on the gage. If the pressure does not reach 4,266 psi (29,435 kPa) or above, the injection
pump (21) must be replaced.
(11) Monitor the pressure gage reading and slowly turn the engine flywheel (20) clockwise. The reading on the gauge
will show a progressive pressure increase to the maximum value noted in step (10) above, then will begin to
drop suddenly. Stop turning the engine pulley at this point and monitor the gage reading as well as the time it
takes the pressure to stop dropping. Note the final pressure reading, to establish the pressure drop, and the
elapsed time.
(a) If the total pressure drop was greater than 50 psi (4906 kPa), replace the injection pump (20).
(b) If the drop occured in less than 7 seconds, replace the injection pump (20).
(c) If the pressure dropped suddenly as expected but continued to fall slowly, replace the injection pump (20).
CAUTION
Always use two wrenches when tightening the fuel pipe to prevent turning the nozzle or injection pump fitting.
(12) If no failure was indicated, remove pressure gage and install fuel pipe (8). Tighten two flare nuts (7) to between
11 and 18 ft-lb (15 and 25 Nm).
(13) Release connecting rod (19).
(14) Position manual shut down lever (22) fully to the right (clockwise).
(15) If stud (17) was removed, install it.
(16) Install new gasket (16), cover (15), flat washer (14), and nut (13).
(17) Install three flat washers (10) and screws (9).
NOTE
The lower two cover screws use special sealing washers.
(18) Install two new washers (12) and screws (11).
(19) Install new gasket (6), cover (5) and three screws (4).
(20) Install cylinder casing (3), two flat washers (2), and screws (1).
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