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Re: Oil Pressure on 300 w/Pict

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Va Gasman

01-31-2013 02:47:17

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This 300 has been converted to 12 volt. It has a nice little Alternator tucked away out of sight. I noticed that after it starts; in 3 seconds it has gone to full charge. How can I check to see if it's getting to much?
Thanks, randy

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01-31-2013 18:44:51

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 Re: Oil Pressure on 300 w/Pict in reply to Va Gasman, 01-31-2013 02:47:17  
Check across the battery terminals when running at 1/2 throttle or more. It should be 14.2 to 14.8 volts. If more it has a bad regulator or is not correctly getting sense voltage. If it is a "one Wire" alternator It is the Internal voltage regulator. (I like and recommend 3 wire setups as they are similar to the way the alt was designed to be used.)
Contrary to others opinions, If there is nothing but oil in the oil pressure line, it will read almost instantly. Oil does not compress, it takes only a few cubic millimeters of oil to change the bourdon tube in the meter. If it was full of air, the tube would need to be run 60 % full of oil to move the needle to the correct mark. That delay with cold oil is why the meter reads slowly. Jim

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D Slater

01-31-2013 04:36:43

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 Re: Oil Pressure on 300 w/Pict in reply to Va Gasman, 01-31-2013 02:47:17  
Probably nothing wrong with the charge rate. Most all altenators charge more than the generator gages that came on those tractors.

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