Cleaning and Inspection.
Clean wiring harness assembly with filtered compressed air or wipe with a clean rag moistened with an
approved cleaning solvent.
Visually inspect for burned, bent, loose, corroded, or otherwise damaged connector pins and terminals.
Inspect wiring for breaks, loose connections, or other obvious damage. Inspect insulation for burns, chafing, and
deterioration. Replace all damaged parts.
Repair. Replace damaged wires, terminals, connectors, and receptacles by unsoldering connections, installing
replacement part and soldering in accordance with Specification MIL-S-6872 using Sn 60 solder that conforms to Federal
Refer to figure 1-18 for wire connection points and routing.
Test. Check continuity of wires using a multimeter or continuity light. Refer to figure 1-18 for wire routing.
Continuity must be indicated through individual wires.
Installation. Install wiring harness assembly in reverse order of removal procedures.
3-44. Engine Electrical Starter (fig. 3-15)
Remove wiring harness leads from starter terminals. Remove four attaching nuts and washers, and
carefully remove starter and packing in a straight line from engine.
Install replacement starter on engine using new packing. Use care t avoid damage 6o starter pawls and
Secure starter with attaching washers and nuts. Tighten nuts securely. Reconnect wiring harness leads to
3-45. Centrifugal Multi-Speed Switch Assembly (fig. 3-15)
Removal. Disconnect wiring harness connector from centrifugal switch assembly. Remove four attaching nuts
and washers and carefully remove switch assembly and packing from engine in a straight line.
Install replacement switch assembly on engine using new packing. Secure switch assembly to engine with
attaching washers and nuts. Tighten nuts securely.
Reconnect wiring harness connector to switch assembly.
3-46. Oil Pressure Sequencing Switch (fig. 3-15)
Remove wiring harness connector and tube assembly from oil pressure sequencing switch.
Remove attaching nut and washer from clamp and remove oil pressure sequencing switch from engine.
Cleaning and Inspection.
Clean switch by wiping with a clean rag moistened with an approved cleaning solvent.
Visually inspect switch for cracks, corrosion, damaged threads, or other evidence of damage.
Check switch actuation and closing and check continuity across receptacle pins. Circuit across pins A and
B and across pins C and E should be open; circuit across pins C and D should be closed.
Install switch in a suitable holding device. Connect a source of filtered, regulated compressed air to switch
inlet port. Slowly apply air pressure and check actuation of switch. At 2.5 to 3.5 psig inlet air pressure, switch shall
actuate to close circuits across pins A and B and across pins C and E and open circuit across pins C and D.
Closing of circuit across pins A and B and across pins C and E need not be simultaneous
providing circuit across pins A and B closes prior to circuit across pins C and E and both
circuits close within .6 to 3.5 psig inlet air pressure.
Gradually decrease inlet air pressure and check switch deactuation. At 1.5 psig minimum inlet pressure,
switch shall deactuate to open circuits across pins A and B and across pins C and E and close circuits across pins C and