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How do you bench test a 6 volt Generator?

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soder

02-28-2001 04:42:35




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Is there a way to bench test a generator with a voltage regulator before installing it on my 48B. I bought a used complete generator with VR and was wondering what tests I could run. I even have an electric motor and 6 volt battery I could hook it up to on my bench. Thanks for any help.




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soder

03-03-2001 07:56:15




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 Re: How do you bench test a 6 volt Generator? in reply to soder, 02-28-2001 04:42:35  
Thanks Guys, I'll try your suggestions this weekend



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Buckeye al

03-02-2001 15:01:32




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 Re: How do you bench test a 6 volt Generator? in reply to soder, 02-28-2001 04:42:35  
Old John T is right on the money there. I do basically the same thing when I'm bench testing a generator but I do one thing a bit different. Just as John says, I ground the "F" post, I hook the "A" terminal to the negative post of the 6 volt battery and then I hook the frame of the generator to the Positive post. A "good" generator will run nicely as a motor when hooked up like this. While it is running this way, I remove the "F" jumper. It should begin to immediately speed up. If it does, all is well and you should quickly disconnect the battery! DO NOT let it run up to top speed with the F terminal OPEN! If your battery, wires and connections are good enough, It could run away (way over speed) & draw way too much current with the F terminal open! If it does not speed up when you remove the F to gorund jumper, the field is either open or has too high a resistance to work properly. These are shunt field DC generators and they will run as motors even if the field is open BUT, if the field is open, they will NOT work as a generator! This test hasn't failed me yet.

Good luck and remember that all electrical devices are made with smoke inside them! When you let the smoke out, then is when your troubles begin. Sometimes it can be real tough to put the smoke back in and make them work again! HA HA.

Later.

Later.

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John T

02-28-2001 07:14:56




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 Re: How do you bench test a 6 volt Generator? in reply to soder, 02-28-2001 04:42:35  
Soder, ground the field wire off the regulator (one that leads from F on Gen to Fld on regulator) to the generators case and apply your 6 volt battery across the the armature terminal lead (A on Gen & Arm on regulator) and case in a positive case ground orientaion, and the generator should run as a DC motor. A DC generator and motor are basically the same thing and if it motors ok, it will probably charge ok also. If you spin the generators pulley with a motor, it should produce a voltage between the case and the Arm lead. At one old time generator shop I go to, the guy just hooks a motor to the pulley and sparks a screwdriver across the generators Arm lead and case and see if she sparks good and loads the motor down, but Im not recommending that necessarily. After you install and wire the thing, polarize it before you start the tractor. Good luck Ol John T

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