Mazda RX7. Manual - part 10

ALTERNATOR & REGULATOR

Article Text (p. 3)

1983 Mazda RX7

For www.iluvmyrx7.com

Sunday, August 26, 2001 03:30PM

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. 4)

1983 Mazda RX7

For www.iluvmyrx7.com

Sunday, August 26, 2001 03:30PM

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. 5)

1983 Mazda RX7

For www.iluvmyrx7.com

Sunday, August 26, 2001 03:30PM

Fig. 4: Exploded View of Mitsubishi Alternator

END OF ARTICLE

FUSE & FLASHER LOCATIONS

Article Text

1983 Mazda RX7

For www.iluvmyrx7.com

Sunday, August 26, 2001 03:30PM

ARTICLE BEGINNING

1983 Fuse Blocks, Flashers & Relays
MAZDA

Fig. 1: Fuses & Flasher Locations

FUSES & FLASHER LOCATIONS

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Manufacturer & Models Component Location in Fig. 1:

Mazda
B2000 & B2200 Pickups
Fuse Locations ............................................... (7)
Flasher Locations ............................................ (9)
Relay Locations
Check & Choke ............................................... (4)
Glow Plug ................................................... (7)
Horn, A/C ................................................... (6)
Wipers ...................................................... (9)

GLC Hatchback
Fuse Locations ............................................... (9)
Flasher Locations ............................................ (9)
Relay Locations
Choke, A/C; Horn ............................................ (6)
Wipers, Others .............................................. (9)

GLC Wagon
Fuse Locations ............................................... (9)
Flasher Locations ............................................ (9)
Relay Locations
Check ....................................................... (6)
Horn ........................................................ (5)
Wipers ...................................................... (9)

RX7

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