ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
Clean magnetic pickup with dry filtered compressed air and wipe with a cleaning cloth (Item 8,
Appendix C) lightly moistened with dry cleaning solvent (item 20, Appendix C).
Inspect magnetic pickup for cracked casing, stripped or damaged threads corrosion, or other visible
If no repair is needed, install magnetic pickup, paragraph 2-110-3.
Install reducer bushing (7, FIGURE 2-30) into flywheel housing. Screw magnetic pickup (6) into
reducer bushing (7) until contact is made with top surface of gear tooth on flywheel. Back magnetic
pickup off one complete revolution. Tighten lock nut (6A).
Connect electrical leads and remove tags.
Connect negative battery cable. Close battery access door.
Adjust magnetic pickup in accordance with paragraph 2-110-4.
Close left side engine access doors.
Release control panel by turning two fasteners and lower control panel slowly.
Disconnect wire 147C from terminal 16 and wire 148C from terminal 17 of governor control unit.
Set multimeter for ohms and connect to ends of disconnected wires 147C and 148C. Multimeter
should indicate between 800 and 1100 ohms.
Leave multimeter connected to wires 147C and 148C and set multimeter for AC volts.
Crank engine with DEAD CRANK switch and observe multimeter. Multimeter indication should be
between 2.0 and 3.0 VAC.
Do not adjust magnetic pickup inward more than one eighth turn each time, or
damage to magnetic pickup may result.
To adjust output voltage in step e, loosen jam nut and turn magnetic pickup in no more than
one-eighth turn at a time to increase output voltage, and out no more than one-eighth turn at a time
to decrease output voltage. Tighten jam nut.
Repeat steps e and f until proper output voltage is achieved.
Remove multimeter, connect wires to governor control unit.
Raise and secure control panel.
DEAD CRANK SWITCH.
Shut down generator set.
Open battery access door and disconnect negative battery cable.
Open left side engine access doors.
Tag and disconnect electrical leads from DEAD CRANK switch (11, FIGURE 2-30).
2-158 Change 1