Water Pump Leak

[Boater Sam]

The open side with the garter spring always faces the fluid so that any pressure pushes the lip against the shaft more.
You can buy standard size lip seals very cheaply but they will likely have ferrous springs if they are bought as oil seals but the bearing shop should be able to supply stainless steel springs instead.

 

[Thistle]

Read Boater Sam's reply again.

Hmm. I had - and still have - some difficulty in equating fresh water pump with sea water pump. I apologise for my inadequacies. The delights of the English language!

 

[Daydream believer]

With a normal single lip seal (usually fitted in these water pumps) the springs goes to the side of whatever it is you're trying to contain. So, water side for the water seal and oil side for the oil seal.

If you fit it the wrong way round it won't seal.

Apologies for this question now being off thread. But on the shaft of a sail drive. Where is the pressure coming from? the oil side or the water side?

 

[Supertramp]

Apologies for this question now being off thread. But on the shaft of a sail drive. Where is the pressure coming from? the oil side or the water side?

Surely the water side? The sail drive is a gearbox separate from the engine and shouldn't run under pressure?

 

[Daydream believer]

Surely the water side? The sail drive is a gearbox separate from the engine and shouldn't run under pressure?

Would one really want the spring ( albeit stainless steel) exposed to the water?
That is the conundrum

 

[dankilb]

Hmm. I had - and still have - some difficulty in equating fresh water pump with sea water pump. I apologise for my inadequacies. The delights of the English language!

Maybe Sam is a freshwater boater?!

[‘Raw’ water might be best for avoidance of ambiguity?!]

 

[scottie]

With regard to the seals wearing the shaft.... if it's a single lip seal you can often replace it with a double lipped seal, but fit it "backwards", this moves the lip that keeps the water in to a new section of shaft.

Dangerous reply if some take half the information and fits a single seal back to front ?

 

[PaulRainbow]

Apologies for this question now being off thread. But on the shaft of a sail drive. Where is the pressure coming from? the oil side or the water side?

If you want to keep the oil in and the water out, you'd fit a double lipped seal, one lip keeps the oil in (the side with the spring) and the outer lip keeps the water out.

 

[PaulRainbow]

Dangerous reply if some take half the information and fits a single seal back to front ?

Seriously ?

 

[Tranona]

Apologies for this question now being off thread. But on the shaft of a sail drive. Where is the pressure coming from? the oil side or the water side?

Both sides. Basic rule applies, seals face opposite ways back to back. Failure is usually from the water side from damage like line getting in or wear on the shaft.

 

[coopec]

I hesitate to ask because maybe there is a reason I have missed?

I understand your engine is a Beta 10 Marine Diesel. Correct?

I agree with most of the comments above but some people on these threads have have an exaggerated view of their mechanical ability. Why don't you download the Maintenance Manual for the engine? I am quite bewildered!

Now where have I gone wrong?



BETA MARINE BETA 10 OPERATOR'S MAINTENANCE MANUAL Pdf Download

 

[Plum]

If you want to keep the oil in and the water out, you'd fit a double lipped seal, one lip keeps the oil in (the side with the spring) and the outer lip keeps the water in.

Paul, there are two types of seal often called " double lipped" each having a different function so the term is confusing.

One has two back to back lips, each with a garter spring, and are for where there is liquid on both sides of the seal and you want to keep the two liquids apart. There is no point in using this type if no liquid (or grease) is on one side, as that lip will just wear away very quickly due to no lubrication.


The other type has a second lip, without a garter spring, on the back side of the seal. In this case the second lip only serves as a dust/debri shield on the dry side of the seal and not designed to prevent liquid from passing.


Www.solocoastalsailing.co.uk

 

[Daydream believer]

If you want to keep the oil in and the water out, you'd fit a double lipped seal, one lip keeps the oil in (the side with the spring) and the outer lip keeps the water in.

I assume last word was meant to be "out" & was just a simple typing error
But Volvo do not supply that as standard in the refurb kit, so there must be a correct way.-- Well ! a Volvo approved way, that is.

 

[PaulRainbow]

I hesitate to ask because maybe there is a reason I have missed?

I understand your engine is a Beta 10 Marine Diesel. Correct?

I agree with most of the comments above but some people on these threads have have an exaggerated view of their mechanical ability. Why don't you download the Maintenance Manual for the engine? I am quite bewildered!

Now where have I gone wrong?

BETA MARINE BETA 10 OPERATOR'S MAINTENANCE MANUAL Pdf Download

Usual mistake from you Clive, you concentrate on making snide comments about other people, without adding anything useful to the thread.

What's the page number in that manual for changing the raw water pump seals ?

 

[Daydream believer]

Paul, there are two types of seal often called " double lipped" each having a different function so the term is confusing.

One has two back to back lips, each with a garter spring, and are for where there is liquid on both sides of the seal and you want to keep the two liquids apart. There is no point in using this type if no liquid (or grease) is on one side, as that lip will just wear away very quickly due to no lubrication.
View attachment 152759

The other type has a second lip, without a garter spring, on the back side of the seal. In this case the second lip only serves as a dust/debri shield on the dry side of the seal and not designed to prevent liquid from passing.
View attachment 152760

Www.solocoastalsailing.co.uk

Interesting. Fortunately I live only a few miles from a bearing supplier in Latchingdon, with whom I have been a customer for 45 years . I can go & chat any time. The manager is a Phantom sailor which is a plus . I will ask about the double lip as my shaft does show signs of wear.

 

[PaulRainbow]

I assume last word was meant to be "out" & was just a simple typing error
But Volvo do not supply that as standard in the refurb kit, so there must be a correct way.-- Well ! a Volvo approved way, that is.

Yes, a typo, edited, thanks.

Volvo seals here: Saildrive sealing kit for Volvo Penta MS25 120S 130S and 150S 3593663

They don't actually use double lipped seals, my mistake, they use a pair of seals, back to back.

 

[Thistle]

Now where have I gone wrong?

I asked the original questions after reading all the manuals I could find, including the one you refer to, and failing to find instructions for changing the seal. Maybe I've missed a page: if so I'd be grateful if you could point me towards it. Many thanks.

In the meantime, a very helpful email from Beta Marine tells me "They should be easy to change out. There is a circlip that holds it in behind the Impeller. Once removed, should be able to pop it out with a screwdriver."

 

[scottie]

Seriously ?

Actually yes

 

[PaulRainbow]

Actually yes

I despair.

 

[scottie]

I despair.

I would redirect you to my latest post