[PSUBS-MAILIST] Lurker finally surfacing!

[hank pronk via Personal_Submersibles]

Jim,I don't know what you have to work with in terms of machining, and if your limited, you can look at picking up the power end of a water pump with a 1 inch shaft.   I have done this, and all you would need is a flat plate at the back of the sub to bolt the assembly onto.   The assembly has the seal in it as well as two bearings to carry the shaft.   I picked one up at a junk yard and replaced the seal and bearings.Hank   On Tuesday, August 28, 2018, 5:27:41 AM MDT, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 The seal is shown and listed on drawing K-250-005-0, item #15 specified as US Seal PS-309.  It's just a spring loaded mechanical "pump seal".  The PS-309 is still available from many suppliers however it is 7/8 diameter so you'd need something similar but larger for your 1" propeller shaft.  There are other types of mechanical seals that will work as well.
Jon

      From: james hughes via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> 
 Sent: Monday, August 27, 2018 10:15 PM
 Subject: Re: [PSUBS-MAILIST] Lurker finally surfacing!
  
Hi Jon,Thank you for your advice!  I've not looked at the motor pod drawings of the K250 in more than a decade because when I first started out I bought two 40# thrust motors from the Kent Corporation and figured I would just use those.  Looking at the drawings now I can't seem to see the details I think I would need build (or tell my nephew how to build) such a part.  It's not clear to me what kind of seal to use (many other parts Captain K. was spacific about, like o-rings and valves) or the size.Thank you for your recomendation for All Seals Inc.  I bookmarked their website some weeks ago and intend on paying them a visit next week (I've got to wait until I get paid on Saturday).  Fortunately, I live only a few miles from their Lake Forest location. I think I've seen a seal that will work for me in their catalog and a calculation that shows how much room I need (after compressing the spring) to firmly hold the seal in place inside the through hull connection.  Now I need some education in bearings.  There is another site that I may contact about those if no one on this list has a recommendation for me.  Thanks again!God bless, Jim  

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