LEMON Manuals: Even more car manuals for everyone
Home >> MG >> 1976 >> Midget >> Repair and Diagnosis >> Electrical >> Charging Systems >> LUCAS Alternator With Integral Regulator >> Description >> Booster Battery (For Engine Start)

Booster Battery (For Engine Start)

Booster battery must be connected with negative lead to negative terminal of battery and positive lead to positive terminal of battery. DO NOT reverse battery leads.

Lucas "ACR" model alternators have an integral voltage regulator mounted in the slip ring end bracket. The stator consists of star-connected, three phase windings on a ring end cover and drive end bracket. The rotor is either an eight or twelve pole type with the field windings connected to two face-type slip rings, and is supported in drive-end bracket by a ball bearing and in the end cover by needle roller bearings. One positive and one negative carbon brush ride against concentric brass slip rings. The heatsink-rectifier, terminal block assembly incorporate six silicon diodes, forming a full wave rectifier bridge circuit, and three diodes which supply current to the rotor windings.

NOTE: Up to a ten milliamp battery drain is normal, even with the ignition in the "OFF" position.