Figure 4-13. Fuel Pump
4-23. FUEL SHUT-OFF SOLENOID
a. Inspect (on Equipment) (see figure 4-14). On ASK equipped
generators, remove right panel assembly (para. 5-6). Check that
electrical connections (1) are secure and clean. Check that rubber
boot (11 ) is clean and not broken. Check that governor and pump
linkage moves freely and is clean.
b. Test (on Equipment) (see figure 4-15).
(1) Tag and remove the solenoid harness leads
(l). Figure 4-14.
Switch S2 in figure 4-16 must be closed during
initial activation of solenoid to prevent in-rush
currents from damaging the dc ammetar. Open
switch S2 after solenoid activation to permit dc
ammeter to function.
(2) Connect the solenoid into test setup (figure 4-
(3) With switch (S1) closed the plunger should
actuate and the current draw should be 0.25 ampere dc.
(4) If plunger does not actuate or if meter reads
above 0.35 amperes replace solenoid.
C . Remove (see figure 4-14). Tag and disconnect
harness leads (1). Remove the shut-off solenoid by
removing screws (9) and Iockwashers (10).
d. Installation. Mount shut-off solenoid using
screws (9) and lockwashers (10). Reconnect previously
tagged and removed harness wires (1).
e. Adjust. The solenoid plunger (3) should be adjusted so it
fully stops injection when in the deenergized position. With engine
running at full rated load, clearance between plunger (3) and control
arm (4) should be at least 1/8 inch. To adjust the plunger length,
loosen jam nut (6) on bottom of plunger. Turn knurled headscrew
(5). Lock jam nut (6) after correct adjustment. On ASK equipped
generators, install right panel assembly (para. 5-6).
Figure 4-14. Adjusting Fuel Shut_Off Solenoid