Fan Cooled Generator

Watch the screw that secures the air intake shield to the aluminum end of the generator. If this screw is too long or is screwed dovm so forcibly that the shield crushes, the screw will enter so far into the generator body that it contacts the regulating field. The screw nay puncture through the insulating wrapping and ground or short out the field. When this occurs generator will not charge.

Use a half inch screw, Part No. 036, with a generator terminal screw fibre bushing, Part Iio. 1665-30 under the air intake shield to prevent shield from collapsing and allowing screw to contact field. Originally the fan cooled generator did not have the fibre bushing under the shield. It is now installed at the factory and should be installed on all fan cooled generators in service at the earliest opportunity.

Usually, when field has been punctured, if the screw is unscrewed so it does not contact the field the generator will again charge normally, and apparently no harm has been done to the regulating field. However, if in doubt whether the field has been damaged or-not, the fi^ld should be tested for current dre» M.-les^be^Si'fiS^ Reg-,.' .

ulating Field Coil". If it is found that the regulating field draws more than 1.9 to 2.3 amperes, it is an indication that one or mûre turns of field coil winding are shorted out, and thé field should be replaced.

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CONNECT W/Ttf TE/ZM/A/AL MABZE& "F" OA/ REGULATOR

Part #30207-32 Field coil.

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FIELD LEAD To Positive BÇUSH

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Field Coil

Part #30203-32

Part #30203-32

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