Checking the Generator
Remark
For checking the electrical system the following test instruments are
required: One Voltmeter range 0 - 20 Volts
- One voltmeter range 0 - 20 Volts.
- One ammeter range 10 - 0 - 60 Amps.
- Load resistance (adjustable) of 500 Watts nominal capacity.
Note
Extinguishing of the ignition warning light after starting and with
increasing engine speed gives no guarantee for charging of the
battery. If the wiring system is in order incorrect charging of the
battery, i.e. excessive or too little charging current, will be
indicated by bad starting, weak headlamp illumination when starting at
night. Abnormally high water requirement by the battery should lead
one to suspect excessive charging current, checking can be carried out
initially without removing the generator or having to uncover the
regulator. In the first instance the condition and tension of the
V-belt should be checked.
Regulator Voltage No Load
- Undo battery lead from terminal B+ on regulator and temporarily
insulate cable shoe. The positive lead of the voltmeter should be
connected to termianl "D+ / 61" and the negative lead to earth.
- Start the engine and run the generator up to double the rated
speed, the voltmeter must then show the correct regulator voltage.
If the prescribed voltage is not reached generator and regulator
should be overhauled.
Regulator voltage on load
- Connections as in Fig. 5 but the A. M. should be connected in
series with the control resistor between terminal B+ on regulator and
earth.
- Start engine, increase speed up to generator test speed and keep
constant. Adjust resistor until the A. M. indicates the corresponding
test voltage. At this setting the voltmeter must indicate at least 12
V with a generator in good condition.
- If during this test the generator gives off no current it must be
removed and repaired.
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