Component Replacement; Reassembly; Rotor Field Coil Ground; Stator Coil Ground/Continuity - Mazda 1983 RX7 Service Manual

Rotor Field Coil Ground

Check continuity between individual slip rings and rotor
core/shaft. If there is continuity, coil or slip ring is grounded,
replace rotor.
Stator Coil Ground
Ensure no continuity exists between stator coil leads and
stator core.
Stator Coil Continuity
Check continuity between leads of stator coil. If there is
no continuity, replace stator.
Brush Wear Limit
Brushes must be replaced when worn to 1/3 of original
length. This limit is indicated by a wear limit line on the side of
each brush.
Brush Spring Pressure
Standard tension should be 12-16 oz. (340-453 g). Replace if
less than 7 oz. (198 g) or if springs are corroded.

COMPONENT REPLACEMENT

Brushes
To remove brushes from holder, unsolder pigtail from
terminal. To replace, solder pigtail to terminal ensure that 1/4"
of brush will be located in brush holder.
Diodes
The diodes and rectifier are serviced as an assembly. If
any diodes are defective, replace rectifier assembly.
Drive End Bearing
Remove bearing retainer set screws. Press bearing out of
front housing.
Rear Bearing
Remove rear bearing from housing assembly using a press or
bearing puller.
Voltage Regulator
The voltage regulator and brush holder are combined in one
unit. If regulator is found to be defective, replace as an assembly.

REASSEMBLY

Reassemble by reversing disassembly procedures. Soldering of
rectifier leads should be done in less than 5 seconds to prevent
damage to diodes. When installing the rotor assembly in the rear
housing, hold the brushes in position by inserting a stiff piece of
wire into the access hole in rear housing.
ALTERNATOR & REGULATOR
Article Text (p. 4)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 03:30PM