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Old 23-06-2013, 17:18   #16
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Your absolutely right, I don't know what I was thinking when Don said I.D. The carbon ring is larger. For Don the number for PYI is 800-523-7558. Chuck
Thanks Chuck. I will check with PYI on Monday and get their comments. I have searched their web site but it gives no ID size for the carbon section. You order by shaft size and install what they send. I like knowing sizes.

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Old 23-06-2013, 18:56   #17
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Re: PSS seal machining faces

You're welcome!!
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Old 23-06-2013, 19:06   #18
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Re: PSS seal machining faces

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Originally Posted by dandrews View Post
Asking a question on this thread.... Working on a project boat that came with tons of misc. items, one being a PSS. My quest is should the ID of the carbon section be the same size as the shaft and the ID of the SS portion? The one I have the ID of the carbon is larger than the shaft. Thanks for any comments.

Don
Don,

This is completely normal. The SS rotor has o-rings and is a tight fit over the shaft intended to seal it. The carbon block has a slightly larger ID.. I just grabbed one off the shelf in a 1" shaft size and the carbon is approx 29.23mm ID and the SS rotor is 25.23mm ID...
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Old 24-06-2013, 12:33   #19
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Thanks MS. That make sense. Appreciate you checking.

Don
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Old 24-06-2013, 12:47   #20
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Re: PSS seal machining faces

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Old 25-06-2013, 18:39   #21
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Re: PSS seal machining faces

Thanks for all the input; I spoke to the guys at PYI and they recommend to place the units on a stable platform and wet sand using 600 grit to remove the grooves and debris. They do not recommend machining but acknowledge that if done right it probably would work. Not surprisingly, they would prefer that you buy a new SS or carbon face.

I have ordered two rebuild kits. The unit that is the oldest unit I will sand and remake with the kit. When I haul in several months, that unit will go on and the one just removed will be similarly treated, and held for replacement when needed.
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Old 25-06-2013, 19:44   #22
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Re: PSS seal machining faces

Train your brain to make a figure 8 pattern when you sand. It will give you a much more even surface and easy to do, just don't think too much while you do it, if so you loose the rhythm.
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Old 26-06-2013, 11:55   #23
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Re: PSS seal machining faces

Mine was badly grooved.
I glued sandpaper from 400 grit to 1000 grit to a machinist's slate and wet sanded/ polished both sides using gradually finer paper.
If I hadn't been able to borrow the slate I would have used a thick piece of flat glass on a steady table.
100% successful.
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