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Old 08-08-2003, 01:27 PM   #1
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Univolt common problem

I have discovered a common problem with older Univolts,and have sucessfully repaired 3 of them for less than $ 40 each . I found the problem to be the capacitors go bad with age , I have seen 2 failure modes the first and prob. most common is the Univolt just sits there and hums ....no output what so ever, the second is the univolt puts out 12 volts just fine but can only light 2 or 3 lights before becoming overloaded. In both case the the old "Caps" were at fault . In the first instance the Cap just is just shorted across the transformer causing no output , the second example when the Cap shorted it caused the transformer winding to melt or break off right at the cap . Both are easily fixed if your handy with a soldering iron ! The caps ,there are 3 of them , all need to be replaced ,DO NOT replace only 1 you MUST replace all 3. The part # on the GE brand caps are 72F6476 the values are ,60 hz ,4uf ,660 volt. If you cant find 660 volt caps ,I have had good results with 440 volt caps , just make sure they have the ,4uf , value. I hope this is helpful to some of you ,I will post the model #'s of the Univolts I have repaired as soon as I can .
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Old 01-21-2004, 07:46 AM   #2
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Smile Univolt capacitors

We stock 4 ufd, 440 VAC capacitors, in the 1.25 inch oval footprint. They are 1-9/16 inches high (things got smaller with newer technology). They have 1/4 inch quick connect tab connectors. They go for $4.82 USD each. There is a $5.95 S/H charge per order for UPS ground delivery to the lower 48 states. No minimum order quantity. We accept Amex, M/C, and Visa.

Hope this helps.

Call or e-mail me for more info or to place an order.

Peter Barratt
York Capacitor Corp.
(802) 655-2550
pbarratt@yorkcapacitor.com
www.yorkcapacitor.com
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Old 06-25-2004, 11:11 PM   #3
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Thanks Peter i have been lookin for a good source.
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Old 01-09-2005, 09:23 PM   #4
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This is an update. York Capacitor is no longer in the business having sold to another company who is moving the manufacturing out of the country. They could not compete with the imports and the new owners are demanding a considerably higher premium.

Regards.
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Old 02-10-2006, 06:33 PM   #5
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OK, I'm a newby here and we have one of those apparently rare 1974 Excella 500's. Anyway we're having major problems with the 12 volt system...nuthin' works! Replaced the missing 50 amp fuse from the neg. line, but still nuthin'. It's a Univolt V & looks new, but it just sits there..doesn't even hum. All the fuse in it look good...where do we go from here. By the way, what's up with the rivets??

Thanks for any advice...Granny
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Old 02-10-2006, 06:39 PM   #6
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Quote:
Originally Posted by Granny Ham
OK, I'm a newby here and we have one of those apparently rare 1974 Excella 500's. Anyway we're having major problems with the 12 volt system...nuthin' works! Replaced the missing 50 amp fuse from the neg. line, but still nuthin'. It's a Univolt V & looks new, but it just sits there..doesn't even hum. All the fuse in it look good...where do we go from here. By the way, what's up with the rivets??

Thanks for any advice...Granny
Granny,

Maybe the circuit breaker for that outlet is tripped. Plug a light into the outlet and see if the light works.

Bill
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Old 03-11-2006, 11:43 PM   #7
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1975 Uni-volt troubles

You have answered my questions on the uni-volt. Mine just hums no battery charging lights work OK. I will remove the unit and get the parts to fix it. Going on a long vacation this year so it is time to fix all the little things.
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Old 03-12-2006, 12:07 AM   #8
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Time to buy an Intellipower and forget about the univolt. Of course thats just my opinion . Swap old technology for new. At least the Intellipower won't boil your batteries dry.

Oh yeah, then join us up in Wenatchee, Wa. for a forums rally in April !

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Old 03-12-2006, 07:42 AM   #9
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I agree - the intellipower (or really any modern staging charger/power supply) will perfectly replace the old univolt and they can be placed such that you never know the old unit was gone. They are compact, lightweight and very reliable. Heck, one of them could pay itself in not boiling one set of batteries and in fact by properly maintaining the batteries they will extend the number of years you go before you would normally have to replace the batts.
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Old 03-12-2006, 11:57 AM   #10
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Thumbs up Agree with Chris and Buttercup

If you nothing else.. replace the univolt with an intellipower and a charge wizard... did that to the Argosy we just sold and it will be the first change in the new to us 1979 30' Argosy... the univolt is only good as an anchor .. Annie
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Old 03-12-2006, 12:56 PM   #11
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Not only does the Intellipower boil off significantly less water, they weigh 7 lbs compared to the Univolt's 47 bazillion lbs.
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Old 03-12-2006, 03:11 PM   #12
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I reluctantly gave up my Univolt for three stage charging. I'm sure you will be happy with the Intellipower, but be sure to explore your options.

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Old 03-12-2006, 04:17 PM   #13
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Quote:
Originally Posted by TomW
I reluctantly gave up my Univolt for three stage charging.
Okay, Andy R, let's try that again:

http://www.airforums.com/forum...stage+charging

BTW, the WFCO unit is great. Head-n-shoulders above the Univolt.

Tom
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Old 03-12-2006, 04:18 PM   #14
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Fine.

Do a search for " 3 stage charging"

Tom
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