Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 12-11-2009, 16:48   #1
Registered User
 
AaronJ's Avatar

Join Date: May 2009
Location: Indialantic, FL
Boat: Hunter 30 - "Nolina"
Posts: 26
PSS Dripless Stuffing Box Leaks!

Hi, does anyone know of possible causes and solutions for a PSS dripless shaft seal that slowly leaks? I have the collar pushed back against the bellows pretty tightly, so it's drips slowly now. When the collar was at normal position it dripped about once every few seconds. Could I sand down the graphite seal or is it time for a replacement?

Thanks,
Aaron
__________________

__________________
AaronJ is offline   Reply With Quote
Old 12-11-2009, 17:04   #2
Senior Cruiser

Cruisers Forum Supporter

Join Date: Jul 2005
Boat: Outbound 44
Posts: 4,593
Give PYI a call. They have good support.

Paul L
__________________

__________________
Paul L is online now   Reply With Quote
Old 12-11-2009, 17:04   #3
Registered User
 
sded's Avatar

Join Date: May 2006
Location: San Diego
Boat: J40 #33 since 1987
Posts: 228
PYI recommends putting a clean rag between the SS and the carbon and spinning the shaft. Be sure you haven't gotten any oil in the seal. I have also used very fine sandpaper (>#400) to clean the SS rotor. Don't sand the carbon.
__________________
sded is offline   Reply With Quote
Old 12-11-2009, 17:26   #4
Senior Cruiser
 
FSMike's Avatar

Cruisers Forum Supporter

Join Date: Aug 2009
Location: Bahamas/Florida
Boat: Solaris Sunstar 36' catamaran
Posts: 2,654
Images: 5
They really don't like oil. Anytime we've messed with them, we finish wearing clean rubber gloves and clean them with alcohol.
__________________
FSMike is offline   Reply With Quote
Old 12-11-2009, 17:31   #5
Registered User
 
moonrsn's Avatar

Join Date: Jul 2008
Location: Puget Sound
Boat: Islander 37 'Taku Wind'
Posts: 44
Get a rebuild kit from them. They don't coat that much.
__________________
Noel Edwards
Faster horses, younger women, Older whiskey, and more money...
moonrsn is offline   Reply With Quote
Old 12-11-2009, 18:19   #6
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,117
How old is the unit? If you are having to push the bellows back more than about an inch from the "out of the box" length to get a seal, its time to replace it.
__________________
Blue Stocking is offline   Reply With Quote
Old 12-11-2009, 18:51   #7
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
For a 1" prop shaft PYI recommends 3/4" preload. I just recently pulled my PSS and shaft. I noticed a little pitting in the seat area and I'll bet it from sitting so much. Mine sits on the hard 10 months out of the year and the PSS and has only been on for two years. If one were to use their boat often I don't think that pitting would be a problem. "Use it or lose it".
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 12-11-2009, 19:04   #8
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,117
I have seen that pitting as you describe on a few boats, and wondered if it might be galvanic action thru the Allen screw and the shaft. I have 1 1/4" monel shaft and a Drivesaver, so installed a tied-in shaft brush. No pitting in ten years. Any thoughts?
__________________
Blue Stocking is offline   Reply With Quote
Old 12-11-2009, 21:26   #9
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Quote:
Originally Posted by Blue Stocking View Post
I have seen that pitting as you describe on a few boats, and wondered if it might be galvanic action thru the Allen screw and the shaft. I have 1 1/4" monel shaft and a Drivesaver, so installed a tied-in shaft brush. No pitting in ten years. Any thoughts?
My shaft, PSS collar and set screws are all stainless. I think................It's the lack of recycled fluids and air (acids) that cause the erosion. although, mine was very minor and I was able to polish it out with a rotary lapping table with a 120 grit..................._/)
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 12-11-2009, 21:41   #10
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
You forget the carbon counterpart of the stainless collar. These two have an electrical connection and each conducts. They also get wet with raw water.

Mine has some corrosion but it isn't leaking. Sometimes it is seized a bit and one time it looked like it was seized good but then a week later it was loose again without me doing anything about it... ???

I think one can machine and lap both collars, I don't really see a reason why that can't be done?? It might leak a little after that at first, but some run-time should seat them again just like happens with a new set? Anybody got info about that?

I have a complete spare set and will probably install that during the next haul-out.

cheers,
Nick.
__________________
s/v Jedi is offline   Reply With Quote
Old 12-11-2009, 23:43   #11
Registered User
 
cat man do's Avatar

Join Date: Aug 2006
Location: Brisbane Australia [until the boats launched]
Boat: 50ft powercat, light,long and low powered
Posts: 4,409
Images: 36
Always wondered about the carbon bush and s/s on those pss seals.
I got these ones instead

__________________
"Money can't buy you happiness but it can buy you a yacht large enough to pull up right alongside it"...............David Lee Roth
Long Distance Motorboat Cruising – It Is Possible on a Small Budget
cat man do is offline   Reply With Quote
Old 14-11-2009, 09:22   #12
Registered User

Join Date: Nov 2008
Location: Seattle
Boat: Wauquiez Centurion 49
Posts: 720
Images: 13
Slip a piece of 150 grit sandpaper (grit to the stainless) while the engine is in gear, and let it run 5 or 10 revolutions. Also you should place a t-bolt clamp on the shaft, butted up to the stainless collar, and secure.
__________________
CAELESTIS is offline   Reply With Quote
Old 25-02-2010, 05:02   #13
Registered User
 
GypsyHawk's Avatar

Join Date: Oct 2009
Location: Brisbane, Queensland, Australia
Boat: Van De Stadt "Helena" 38
Posts: 56
Yes I am a little late but just came across this thread while dealing with my own leaking shaft seal (only when spinning). Caelestis, what do you mean "place a t-bolt clamp on the shaft"? Why? When?
__________________
GypsyHawk is offline   Reply With Quote
Old 25-02-2010, 08:16   #14
Registered User

Join Date: Nov 2008
Location: Seattle
Boat: Wauquiez Centurion 49
Posts: 720
Images: 13
Quote:
Originally Posted by GypsyHawk View Post
Yes I am a little late but just came across this thread while dealing with my own leaking shaft seal (only when spinning). Caelestis, what do you mean "place a t-bolt clamp on the shaft"? Why? When?
There are two very small screws that hold the stainless collar in position on the shaft (additionally there are two screws on top of the "gripping" screws so they do not back out). Those screws are woefully inadequate to hold the collar over time. Place a t-bolt clamp up against the collar and it will not move.
__________________
CAELESTIS is offline   Reply With Quote
Old 05-03-2010, 19:11   #15
Registered User
 
Pete the Cat's Avatar

Join Date: Nov 2006
Location: Maine and California
Boat: Tartan 37 "Velera"
Posts: 338
As a delivery skipper, I have often thought of adding a surcharge for anyone who has one of these suckers. They always seem to be a problem. They leak they need to be "burped" they do not seal or they score the shafts. I have no idea why folks put these complicated devices on their couplings now that we have materials that will keep the water out and work without dripping like the carbon fiber or clay packing. Sheesh! I am goning to add a surcharge for deliveries if you have one of these as I always have to bail constantly and adjust them. Pain in the butt.
__________________

__________________
Ray Durkee
S/V Velera
Tartan 37
Castine, Maine
Pete the Cat is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Stuffing Box - Can I Do This? pressuredrop Construction, Maintenance & Refit 3 26-12-2009 19:04
Need Stuffing Box Help TOM Propellers & Drive Systems 8 12-09-2009 22:34
For Sale: PSS Seal - New in Box Chief Engineer Classifieds Archive 0 11-08-2009 20:21
Stuffing box or re-stuffing the box / dripless Dave in Eugene General Sailing Forum 10 28-12-2007 16:45
Stuffing box help Iain Propellers & Drive Systems 18 30-08-2007 07:32



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:44.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.