Generator Screws

Testing Field Coils and Brush Holders Without Disassembling Generator

CAUTION: Overloading ammeter, due to short circuit or otherwise, will damage it. Overload is indicated by needle going beyond range of calibrated scale; direct short is indicated by needle swinging violently to extreme limit of its travel. In either case, contact must be broken instantaneously to avoid damaging or burning out ammeter. Therefore, in making the following tests with ammeter, first make only a momentary contact to determine if a short exists. If ammeter needle does not go beyond calibrated scale, it is safe to make continuous contact and proceed with test as described.

As an added precaution, in making tests with ammeter, always work on a bench with an insulated top. This will prevent shorting through bench top.

Never touch test points together.

Connect a fully charged battery to suitable test ammeter and test points as shown in Illus. 83.

Remove the brushes from their holders (see "Inspecting or Replacing Generator Brushes,"

Removing main brushes requires removing screws connecting field coil terminal wires to brush holders.

Model 32E and 32E2 - Standard and Radio Three Brush Generator

1. Remove resistor from generator "relay" and "switch" terminals of a Radio generator before making tests.

2. Reconnect field coil wires to positive and negative brush holders before making tests.

Testing Regulating Field Coil {see Illus. 83):

3. Touch test point "A" to "relay" terminal of generator and test point "B" to third (regulating) brush holder. The ammeter should read as follows:

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