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Unread 11-13-2008, 09:43 PM   #11
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Default Re: Converting over to 48 volt system???

I recently rebuilt an old Cushman Golfster and would like to upgrade the voltage. The motor is a GE 5BC48JB500E, and is marked 36v. It is a simple design with a 12v solenoid and coil resistors. Can I simply pump 48v to it without doing any harm?
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Unread 11-13-2008, 11:10 PM   #12
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Default Re: Converting over to 48 volt system???

Your 36v solenoid may fry open or closed or never? Play it safe and get a 48v solenoid and then put it to her!
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Unread 11-16-2008, 07:41 PM   #13
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Default Re: Converting over to 48 volt system???

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Originally Posted by scottyb View Post
Your 36v solenoid may fry open or closed or never? Play it safe and get a 48v solenoid and then put it to her!
It seems like replacing the solenoid is a waste. Even after adding batteries to bring the voltage up you can always tie into the batteries at a spot to give you 36V for the solenoid is that correct?
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Unread 11-16-2008, 07:49 PM   #14
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Default Re: Converting over to 48 volt system???

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Originally Posted by twoskinsoneman View Post
It seems like replacing the solenoid is a waste. Even after adding batteries to bring the voltage up you can always tie into the batteries at a spot to give you 36V for the solenoid is that correct?
No, if you don't have the added extra power going through the solenoid something is bad wrong.

With that being said, there are 2 things you have to think about with solenoids. There is the activation coil circuit voltage and there is main contactor voltage. You can run the activation coil off of 36 volts , run 48 through the contactor and you "might" never have to buy one at all....then there are some solenoids that will weld the mains closed on first contact...you just never know till you try.

I reccommend buying a HD 48 volt solenoid for safety sake. It makes wiring things up a whole lot easier for people who don't know the system very well.
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Unread 11-16-2008, 07:51 PM   #15
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Default Re: Converting over to 48 volt system???

You can wire the activation circuit for 36v, but the full pack current will pass through the secondary. The secondary is rated for a certain voltage and current, which are both being surpassed by the overvoltage condition. Better to be safe than sorry. I have seen the results of welded solenoids and melted golf carts.
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Unread 11-16-2008, 07:53 PM   #16
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Default Re: Converting over to 48 volt system???

Roady, that's about the fourth time today we have doubled up. WTH? LOL!
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Unread 11-16-2008, 07:57 PM   #17
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Default Re: Converting over to 48 volt system???

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Roady, that's about the fourth time today we have doubled up. WTH? LOL!
I'M WATCHING YOU! ooooooohhhhh!
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Unread 11-16-2008, 08:01 PM   #18
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Default Re: Converting over to 48 volt system???

That explains my sudden urge to deficate!
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Unread 11-16-2008, 10:19 PM   #19
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Default Re: Converting over to 48 volt system???

OMG they are Twins , seperated at birth
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