Chevrolet 30 Series 1967 Service Manual page 362

ENGINE-ELECTRICAL 6Y-14
Fig. 13c—Adjusting Field Relay Closing V o ltag e
No. 2 terminal to ground (fig. 11c).
2. Operate the engine at fast idle (1500 to 2000 rpm)
and observe voltmeter reading.
3. If voltmeter shows zero voltage at regulator, check
circuit between No. 2 terminal on regulator to " R"
terminal on Delcotron.
END
FRAME
CASE
DIODES
POSITIVE
CASE
BRUSH
DIODES
ASSEMBLY
SLIP
RINGS
GREASE
RESERVOIR
BALL
BEARING
HEAT
SINK
F ig . 14c—130 Amp Series 4D , Type 150 Delcotron
4. If voltage at regulator exceeds closing voltage speci­
fication and light remains on, regulator field relay
is faulty (Refer to specifications). Check and adjust
regulator as follows:
Closing Voltage Adjustment
1. Make connections as shown in Figure 12c using a
50 ohm variable resistor.
NOTE:
This gives us a variable resistance in
series from a hot lead to the relay coil.
2. Turn resistor to " open" position.
3. Turn ignition switch off.
4. Slowly decrease resistance and note closing voltage
of the relay. Adjust by bending heel iron in the
manner illustrated in Figure 13c.
Other Harness Checks
Other wires in the charging system harness need be
checked for continuity by use of an ohmmeter or a test
light (12 Volt). Connect the test so the wire in question
is in series in the test circuit.
FULL TRANSISTOR REGULATOR
TEST PROCEDURE
6.6 " GENERATOR SYSTEM -130 AMP (Fig .l4 c)
The full transistor test procedures are made for the
purpose of isolating the unit that is causing the charging
ROTOR ASSEMBLY
SLIP RING
STATOR
END FRAME
ASSEMBLY
GREASE
BALL
RESERVOIR
BEARING
CHEVROLET TRUCK SERVICE M ANUAL