Specifications

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101

102

TO ENGINE

GROUND

FUSE

PROBE

D.C. VOLTMETER

Green

Yellow

103

RECTIFIER PANEL

MOUNTED ON

ENGINE

A.C.

VOLTMETER

FUSE

3 Amp D.C. Alternator System - Rectiﬁer

Panel

This 3 Amp system is readily identiﬁed by the rectiﬁer

panel in the circuit. The panel includes two diodes and

a fuse for overload protection. The rectiﬁer panel does

not regulate the output of this system.

CHECKING THE SYSTEM: Check the fuse to

determine if it is good. A continuity light or ohmmeter

can detect a faulty fuse. Replace with a six (6) Amp fuse

if necessary. Determine if the diodes are functioning

properly. A continuity light may be used to check diodes

(diag. 101).

When replacing the diode in the rectiﬁer panel, locate

the undercut on one end of the diode and match it to the

detent on terminal clip of the rectiﬁer panel.

Test the D.C. output of the rectiﬁer panel as follows:

Disconnect the battery lead from the terminal of the

rectiﬁer panel. Use a D.C. voltmeter probe on the +

battery terminal (diag. 102). Connect negative lead to

engine ground.

Minimum values should read:

2500 R.P.M. - 12.0 Volts D.C.

3000 R.P.M. - 14.0 Volts D.C.

3300 R.P.M. - 16.0 Volts D.C.

3600 R.P.M. - 18.0 Volts D.C.

If these minimum readings are noted, the system is

okay. Check for bad battery, ammeter, wiring, etc.

If reading is less, proceed to make an A.C. output check.

With the battery lead disconnected from rectiﬁer panel,

probe the A.C. terminals with the voltmeter on the A.C.

scale (diag. 103).

Minimum values should read:

2500 R.P.M. - 24.0 Volts A.C.

3000 R.P.M. - 29.0 Volts A.C.

3300 R.P.M. - 32.0 Volts A.C.

3600 R.P.M. - 35.0 Volts A.C.

If less than above output, generating coil assembly is

defective.

NOTE

If there is no regulator in this system. The total output of

the two diodes is three (3) AMPS.

If the battery is overcharging (boiling

and bubbling), reduce the D.C. input

by one-half by removing one of the diodes. Failure to do

so may result in personal injury.

CAUTION

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