Specifications

If less than the above readings, proceed in making an A.C. output check by pulling back the protective

coating from the fuse holder and diode. Using an A.C. voltmeter, check voltage from a point between the

engine and the diode as shown in the diagram (diag. 73).

With the engine running the minimum values should read:

2500 R.P.M. - 18.0 Volts A.C.

3000 R.P.M. - 22.0 Volts A.C.

3300 R.P.M. - 24.0 Volts A.C.

3600 R.P.M. - 26.0 Volts A.C.

If low or no voltage is experienced, replace the alternator. If the alternator puts out the minimum A.C. voltage,

replace the diode.

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. 75). 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. 76).

TO ENGINE

GROUND

FUSE

PROBE

D.C. VOLTMETER

Green

Yellow

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. 74).

(Continued on Next Page)