capacitor replacement

[Steve Max]

When I do pm's, I check capcaciter strength and if I find the strength lower than the rated tolerance, I recommend replacement. How far out of it's rated strength it is determines how strongly I recommend replacement. I consider anything below the rated tolerance, usually 6% or 10%, a canidate for replacement.
However some the tolerances can be very small. For example, 6% of 7.5 mfd is .45, making that capaciter replacable below 7.1. Looking at a Turbo capaciter though, they are using 2.5 mfd for 3 mfd and 5 mfd for 4mfd, etc. In my understanding this would be out of the rated range for the motor.
Am I wrong on this? At lower mfd values do the rules change? I don't want to recommend replacing parts that don't need to be replaced. My understanding that a capaciter under its rated strength is a sign that it is weakening and will lose further strength at an unknowable date.

[heatingman]

no, the rules don't change. I've never actually tested the values on the turbo's. If it says 5 and reads 4, I think that's a problem.

If in doubt use the specific purpose caps. IE- 35/5, 45/5 etc..

[superfittertech]

replace if more than 10%. Where did you get the 6%?

[johnbeck1000]

replace if more than 10%. Where did you get the 6%?

I've seen some caps say 5% or 6% sometimes, I don't know the brand

[HeyBob]

seems to me each time I used a Turbo it blew up on a hot day, I will not use them anymore.

[Senior Tech]

seems to me each time I used a Turbo it blew up on a hot day, I will not use them anymore.

Not to mention you can buy about 10-15 regular capacitors for the cost of one turbo.

[HeyBob]

Not to mention you can buy about 10-15 regular capacitors for the cost of one turbo.

yep

[Mr Bill]

Judas Priest was a turbo lover. :grin2:

http://www.youtube.com/watch?v=LYmb-6qABIY&feature=related

[HeyBob]

Judas Priest was a turbo lover. :grin2:

http://www.youtube.com/watch?v=LYmb-6qABIY&feature=related

so is Arne! He has a 7.3 Turbo

http://www.youtube.com/watch?v=XLjUyCxS5PY

[REP]

Its things like this and my grey bald head that remind me that when you are not out there all the time you can lose all reality.
I checked it out on the net and of course they didn't mention the tolerances but I see where a smaller rated cap can be used for a size larger cap.I would still go by the 10% rule myself and if i found an 8% one i'd change it.Who wants to back on a capsitor?

[Cool-Pro]

capcaciters, capaciters, capsitors, turbo or not, I replace them everytime I see them. :grin2: