4-24. ELECTRICAL SYSTEM - Continued
Thread the other end of the lead from step 12 through the rear of the alternator using convenient
ventilating holes. Make sure the lead is routed and secured so it does not interfere with rotor.
Assemble stator (7) to end frame (6) using three sets of nuts and washers (9 and 10).
Assemble rotor and drive end frame assembly (8) and slip ring end frame (6) using bolts (5).
Install alternator on engine with fulcrum bolt.
Slip drive belt over engine and alternator pulley.
Install belt tightening bolt and nut. Lever on alternator until there is approximately 1/2 in. (12 mm) belt
movement midway between the pulley.
Tighten belt tightening nut and bolt securely.
Connect leads to alternator as tagged in step 2. (New white lead is connected to alternator ground, blue
lead from inverter is connected to positive terminal of regulator plug.
Start main engine and check current generated on cab amp gage.
The main engine alternators are the same model as installed on the APU The main engine alternator regulators
and tri-diodes are not used; the 110 Vac inverter is used to regulate alternator output. For repair of main engine
alternator refer to para. 4-15.3.