trouble with my pss shaft seals

dave p · Veteran Member

trouble with my pss shaft seals

Blue Swell · Senior Member

Hi Dave,

Unfortunately cannot help as i have the normal packing gland arrangement.

There is comprehensive instructions on line http://www.shaftseal.com/about/installation_instructions hope these may help

Glad quick think got you pumped out and out of trouble.

Regards Geoff

dave p · Veteran Member

hi geoff

my boat had the normal packing gland arrangement but the owner had it change to the pss seal .i have the
bronse stern tube still in place which the pss seals mount on to ,i would rather have the normal packing gland arrangement
but i dont know where to get them and proberly be rather expensive ,at the moment i think i will fit the volvo seals as i spoke to volvo and they said they fit them to boats that do over 30 knots with high engine revs and as mine only revs to 2500 revs and i have 1-1 gearbox's there shouldn't be a proplem with the low revs .

dave

Martin · Senior Member

Hi Dave

If you have all the gear for the normal packing, except the packing it is very cheap, about £3 p/metre do you mean the compression plate and studs have been removed? I guess you can get all this stuff relatively cheaply from ASAP supplies and re fit it, though I am guessing you would have to be dried out to do it.

God luck and glad you managed to find the problem quickly , there is only one thing worse than finding water gushing into your boat from an unknown source when you are afloat.

Cheers

Martin

Blue Swell · Senior Member

Hi Dave,

Before you spend your money speak to these guys,always willing to help.

http://www.clementsmarine.co.uk/home/

Best wishes Geoff

dave p · Veteran Member

hi martin

the only thing i have in the boat left from the normal packing gland arrangement is the bronce tube which is about 6 inch's long with about tow inch's of fine thread on the end .so i dont know what need to turn it back to normal packing gland arrangement .

dave

dave p · Veteran Member

hi geoff

i think for know i will go for the volvo seals as they are on the shelf and if i buy two ,i can get them for £70 each which ain't to dear

dave

Martin · Senior Member

Hi Dave - your arrangement sounds different to mine. Mine has a collar with 2 studs on which the compression plate sits and can be tightened as required with 2 locking nuts. Inside is 3 lengths of packing and of course plenty of grease.

Good luck with the new s eals.

Martin

kees · Veteran Member

Hi Dave,

Had the same last year with a deep sea seal, it jammed on the propshaft and twisted the neoprene hose like a corkscrew. Was lucky the old bilge alarm worked.

I replaced it with a Volvo seal, who are now available in 45 mm. They are water lubricated and cooled, so need water at all times. The max temperature of the seal may not exeed 60 deg. C. As I use a thrust bearing who is close to the seal and becomes +50 deg. C, I placed a water scoop in the hull who presses water via a hose just behind the seal. I use the seal for 1 year now and had never a drop of water inside.

The lip seals from Allpa have a water injection pipe vulcanised between the lips and bearing to ensure lubrication and look even better to me, but are not available above 40 mm diameter.

best regards,

keep it dry,

kees.

Simon · Founder Member

I have been looking at your exchanges regarding shaft seals.

The original packing glands were pretty bullet proof although you had to accept the occasional drip and adjustment from time to time. With PTFE packing material they require water injection to lubricate fed from the seawater pump on the engine.

We now use the 'Tide Seal' which we find very satisfactory particularly as they are simple to fit and drip free. They also carry a space seal in the shaft so if one goes you can cut it away and slide the new one into position. They are used on very large ships as well as fast moving vessels of all types. If you need contact details follow this link https://www.tidesmarine.com/

Good luck.

Simon T.

kees · Veteran Member

Hi Dave,

see pictures, Volvo seal

br,

Kees

dave p · Veteran Member

cheers kees for the pictures and advice

A volvo engineer told me i dont need to inject water in to the stern tube because i have twin engines and theres no keel in front of the shafts so there is enougth water entering the stern tube .also there is a scoop just above both shafts at the end of the stern tubes. when the weather stops blowing and raining i will fit the new volvo seals and try them if they do start getting hot i have enough room in the bronce stern tube to put a fitting to inject water in the tube so not i problem .

dave