For:
- Datsun (1966-73)
- Honda (1971-72)
- Chevrolet LUV (1972-73)
- Subaru (1971-73)
DESCRIPTION
The regulator system consists basically of a voltage regulator and a charge relay. The voltage regulator has two sets of contact points, a lower set and upper set, to control alternator voltage. An armature plate placed between the two sets of contacts moves upward, downward or vibrates. The lower contacts, when closed, complete the field of circuit direct to ground. The upper contacts, when closed, complete field circuit to ground through a resistance (field, coil), and thereby produces alternator output. The charge relay is similar in construction to voltage regulator. When upper contacts are closed, ignition warning lamp goes on.
APPLICATION
Model Hitachi Part No.
Datsun
1200
1971-72 ............................................. TL1Z-37
1973 .................................................. TL1Z-57
510
1968-71 ............................................. TL1Z-17
1972-73 ............................................. TL1Z-57
521
1969-71 ............................................. TL1Z-17
1972 .................................................. TL1Z-57
520
1966-71 ............................................. TL1Z-10
610
1973 .................................................. TL1Z-58
620
1973 .................................................. TL1Z-57
240Z
1970-71 ............................................. TL1Z-37
1972-73 ............................................. TL1Z-57
Honda
1971-72 ............................................. TL1Z-33
Chevrolet LUV
1972-73 ............................................. TL1Z-66
Subaru
1100
1971 ............................................... TL1Z-27
1300
1971 ............................................... TL1Z-54
1972-73 .......................................... TL1Z-65
1400
1972-73 .......................................... TL1Z-65
1) Connect voltmeter and ammeter as illustrated. Start and maintain engine speed or 2500 RPM for a
few minutes, then check to make sure that reading of ammeter is 5 amps or less. If ammeter remains higher than 5 amps, disconnect battery in use and connect a battery known to be fully charged. Recheck to be sure reading of ammeter is lower than 5 amps.
2) Lower engine speed to idle and again increase it gradually to 2500 RPM, then note voltmeter reading. Function of regulator is normal if measured value is within specified regulating voltage. If reading o voltmeter deviates from specified range, it indicates regulator is in need of adjustment.
NOTE - Adjustment of yoke gap is necessary on some models.
2) Adjust core gap by loosening screws attaching contact set to yoke. Move contact set upward or downward as required. Adjust point gap by loosening screw attaching upper contact. Move upper contact up or down as required to set gap to specification.
3) Adjust regulated voltage by means of adjusting screw. Turn screw in to increase regulated voltage or out to decrease voltage. When correct voltage adjustment is obtained, secure with lock nut. When adjustment procedure is complete reinstall regulator and perform on car check.
1300
1971 ............................................... TL1Z-54
1972-73 .......................................... TL1Z-65
1400
1972-73 .......................................... TL1Z-65
TESTING
VOLTAGE REGULATOR1) Connect voltmeter and ammeter as illustrated. Start and maintain engine speed or 2500 RPM for a
 |
| VOLTAGE REGULATOR TEST CIRCUIT |
2) Lower engine speed to idle and again increase it gradually to 2500 RPM, then note voltmeter reading. Function of regulator is normal if measured value is within specified regulating voltage. If reading o voltmeter deviates from specified range, it indicates regulator is in need of adjustment.
CHARGE RELAY
Set up test circuit as illustrated and check specifications table to ensure proper operation of relay |
| TESTING CHARGE RELAY |
ADJUSTMENT
1) Disconnect and remove voltage regulator from vehicle. If contact points are roughened, smooth with fine sand paper. Check and adjust gaps, core gap first, then point gap.NOTE - Adjustment of yoke gap is necessary on some models.
2) Adjust core gap by loosening screws attaching contact set to yoke. Move contact set upward or downward as required. Adjust point gap by loosening screw attaching upper contact. Move upper contact up or down as required to set gap to specification.
3) Adjust regulated voltage by means of adjusting screw. Turn screw in to increase regulated voltage or out to decrease voltage. When correct voltage adjustment is obtained, secure with lock nut. When adjustment procedure is complete reinstall regulator and perform on car check.
