Overhaul Disassembly; Diode Assemblies; Rotor Field Continuity - Mazda 1983 RX7 Service Manual

1) After removing through bolts, insert screwdriver between
front housing and stator to separate.
2) Hold the rotor in a soft jawed vice. Remove pulley nut,
pulley, fan, and spacer. Remove rotor drive end housing by lightly
tapping end housing with a soft mallet.
3) To separate stator from diode end housing, unsolder three
negative diode leads and connections between diodes. Hold the stator
lead with a needle nose plier to prevent rectifier from overheating.
4) Remove condenser from the "B" terminal. Unsolder the "L"
and "B" terminal from the rectifier assembly. Lift out rectifier
assembly and brush holder.
TESTING

Diode Assemblies

1) Check each diode with ohmmeter in forward and reverse
direction. If the diode shows large resistance in one direction and
small resistance in other direction, diode is normal.
2) If diode shows small resistance in both directions, it is
shorted. If large resistance is shown in both directions, diode is
open. Heat sink and diodes are replaced as an assembly.
Fig. 3: Testing Mitsubishi Integral Regulator
Ensure variable resistor is set to middle of resistance range.

Rotor Field Continuity

Check continuity across field coil slip rings. A reading of
3-4 ohms must be obtained. No continuity, replace rotor.
ALTERNATOR & REGULATOR
Article Text (p. 3)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 03:30PM