Who has PSS shaft seal installed? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > Boat Builders Row > Pacific Seacraft
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 04-22-2010
orientalnc2010's Avatar
Senior Member
 
Join Date: Oct 2007
Location: oriental NC
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
orientalnc2010 is on a distinguished road
Who has PSS shaft seal installed?

I just got off the phone with an engineer from PYI about the PSS shaft seal.
Displacement vessels that power under 12 knots and have a cutlass bearing in the shaft log must bring raw water to the seal to ensure that it always has water. Has anyone plumbed their seal to a raw water source, if so where did you pick it up.
Who has a PSS shaft seal in service, with a cutlass in the shaft log, that just has a vented loop? Do you have any problems keeping water in the seal esp under full power? I was told that if you go hard astern water can actually be driven up the vent hose and spill out over whatever happen to be near or under the hose.
Thanks for any feedback.
__________________
Regards,
Steve
PSC 31 #125
Ryoko
Oriental, NC
One of the two happiest days in a sailors life
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #2  
Old 04-22-2010
erps's Avatar
the pointy end is the bow
 
Join Date: Aug 2006
Location: La Conner, Washington
Posts: 6,154
Thanks: 2
Thanked 26 Times in 26 Posts
Rep Power: 10
erps will become famous soon enough erps will become famous soon enough
I have a PSS seal with a cutlass bearing in the shaft log but there are also a couple little water breather holes forward of the cutlass bearing. No issues for 13 years.



Propeller shaft and cutlass bearing picture by sv_nikko - Photobucket
__________________
Ray
S.V. Nikko
1983 Fraser 41
La Conner, WA


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Boating for over 25 years, some of them successfully.

Last edited by erps; 04-22-2010 at 05:10 PM.
Reply With Quote Share with Facebook
  #3  
Old 04-22-2010
erps's Avatar
the pointy end is the bow
 
Join Date: Aug 2006
Location: La Conner, Washington
Posts: 6,154
Thanks: 2
Thanked 26 Times in 26 Posts
Rep Power: 10
erps will become famous soon enough erps will become famous soon enough
hmm, don't know why the picture is a thumbnail now. It used to paste big pictures in the threads.
__________________
Ray
S.V. Nikko
1983 Fraser 41
La Conner, WA


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Boating for over 25 years, some of them successfully.
Reply With Quote Share with Facebook
  #4  
Old 04-23-2010
lsbrodsky's Avatar
Senior Member
 
Join Date: Jul 2000
Location: New Bern, NC
Posts: 111
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 15
lsbrodsky is on a distinguished road
I had a PSS shaft seal installed in my 31 in year 2 of ownership and it ran flawlessly the entire time I owned the boat. There was no vent hose but you had to remember to burp the seal after the boat had been hauled to be sure the seal was reflooded. When doing so, it was obvious that there is enough leakage through the cutless to lubricate/cool the seal bearing surfaces. My experience with this same design on large naval vessels was that forced injection cooling was required because of the large bearing size, higher loads, and higher rpm. This is a proven design with decades of operation. When I asked the factory, back in 1993, why the PSS was not standard their reply was that parts might be hard to find in remote regions of the world where a standard seal could be packed with almost anything and still function.
Larry
Reply With Quote Share with Facebook
  #5  
Old 04-23-2010
T37Chef's Avatar
Senior Member
 
Join Date: Oct 2006
Posts: 4,161
Thanks: 65
Thanked 28 Times in 26 Posts
Rep Power: 8
T37Chef will become famous soon enough
I will be installing one this weekend. The vent hose is to prevent/reduce crevice corrosion I believe. I have been advised that the hose only needs to be vented, not plumbed into a source, just well above the waterline.
Reply With Quote Share with Facebook
  #6  
Old 04-23-2010
lsbrodsky's Avatar
Senior Member
 
Join Date: Jul 2000
Location: New Bern, NC
Posts: 111
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 15
lsbrodsky is on a distinguished road
No, the vent hose is to assure that no air gets trapped in the seal; it is always vented precluding the need to ever burp the seal or worry about air. Mine was not vented and I never had an air problem except when I hauled the boat. You had to remember to burp the seal when it was splashed. Maybe the vent requirement is to avoid operator error. I suppose with the right configuration cavitation might result in drawing air into the seal but I don't know how that would happen on a PSC.
Larry
Reply With Quote Share with Facebook
  #7  
Old 04-25-2010
orientalnc2010's Avatar
Senior Member
 
Join Date: Oct 2007
Location: oriental NC
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
orientalnc2010 is on a distinguished road
Thanks to all for the response. Thanks Larry for the first hand info that I was hoping to receive, based on your success I will not plumb water to the seal. All PSS shaft seal now come with the nylon barbed fitting already installed in the carbon so I will be adding a vent hose. I agree with your assumption that PSS did this to eliminate user error when it comes to manually burbing the seal. In my previous boat, a sabre 34, I did install a PSS seal and I had to remember to burb it each time we launched the boat, not a big deal.
__________________
Regards,
Steve
PSC 31 #125
Ryoko
Oriental, NC
One of the two happiest days in a sailors life
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Winterizing propeller shaft seal pkats Gear & Maintenance 11 11-03-2009 11:14 PM
Shaft seal Edo Kazumichi Gear & Maintenance 9 11-23-2006 11:03 AM
Packless Shaft Seal (PSS) bkdehuff General Discussion (sailing related) 4 04-20-2004 05:41 PM
PSS shaft system althemurr Gear & Maintenance 6 12-08-2000 04:46 PM
The Stuffing Box and Stern Tube Tom Wood Gear and Maintenance Articles 0 04-27-1999 08:00 PM


All times are GMT -4. The time now is 04:40 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.