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crown sp3020 plugging problems

I have several crown SP320 trucks and i seem to notice a trend of plugging issues with these trucks. Ill get a truck in my shop and the operator states that the truck will not plug usually only from reverse to forward. so the first few times i would just replace the contactors and away they went no further problems. then i started to notice that the same truck would be back 2 months later same problem and i know that there is no issue with the contactors (brand new). so i guess i am looking for any other suggestions on where to look what to check and so on and so forth any help would be great.
  • Posted 20 Jun 2013 21:31
  • By xerox10
  • joined 20 Jun'13 - 8 messages
  • New York, United States
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Showing items 21 - 21 of 21 results.
I have several of these machines and I have found that the speed pot in the handle gets a open spot. Access the pot and ohm it in both ways slowly to see if opens. The pot is a 10K ohm good luck, let me know what you find.
Cal
  • Posted 20 Jun 2013 23:35
  • By cal_h
  • joined 14 Jun'13 - 3 messages
  • Washington, United States
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