I seam to have lost my bearings.

[wingcommander]

As title of thread ... and gps or what 3 words are helpless in this case...
See attached photo , new to me Bukh 24 raw water pump. As removed this is all I have . Surely their should be two ball bearing on the pump shaft as per all the diagrams I've seen . Or is this a different type ...
Also the shaft has a cica 5mm hole at engine end . Should their be a retaining pin of some description, mine seems to have unretained itself. May have to inspect the bilge.

Ignore the thermostat , its all work in progress..

Thanks

 

[Poignard]

The one you have has a sleeve bearing. Later models, such as I retrofitted to my BUKH DV10, have ball bearings.

The hole in the shaft serves no purpose here. You have not lost anything.

 

[coopec]

As title of thread ... and gps or what 3 words are helpless in this case...
See attached photo , new to me Bukh 24 raw water pump. As removed this is all I have . Surely their should be two ball bearing on the pump shaft as per all the diagrams I've seen . Or is this a different type ...
Also the shaft has a cica 5mm hole at engine end . Should their be a retaining pin of some description, mine seems to have unretained itself. May have to inspect the bilge.

Ignore the thermostat , its all work in progress..

Thanks

Hate to be pedantic but when you said it had two ball bearings I was confused.

 

[Poignard]

This is the later version with ball bearings that I fitted to my engine.


Johnson Flexible Impeller Pump 10-35157-1

 

[Malish]

wonder what the difference is, other than £45

 

[wingcommander]

Thank you , I was a little concerned . Was their a specific reason the bearings were fitted to the new design.

 

[Poignard]

Thank you , I was a little concerned . Was their a specific reason the bearings were fitted to the new design. Ime sure their is room to press in two into this housing if it prolongs the wear n tear...

You couldn't fit ball bearings to your existing pump.

If you compare your with the one in my post you can see that the body in the latter is larger to accomodate the ball bearings.

 

[wingcommander]

Gotcha.. I just pressed in the seals and its more or less flush, so yes I see your point. Was their a reason for the change of design.?

 

[neil_s]

In theory, there should be an 'O' ring in between the lip seals. This acts as a water drop 'thrower' in case any get past the lips. It is hard to keep this in place, though, since the shaft often slides out when you change the impeller.

 

[wingcommander]

In theory, there should be an 'O' ring in between the lip seals. This acts as a water drop 'thrower' in case any get past the lips. It is hard to keep this in place, though, since the shaft often slides out when you change the impeller.

Cheers , I realise the possibility of the weep holes being blocked by misplaced lip seal. Glad to know I don't need to go bilge fishing for a non existing pin also . Any thoughts on a homemade poker gasket or in a genuine Bukh one a must...

 

[Poignard]

In theory, there should be an 'O' ring in between the lip seals. This acts as a water drop 'thrower' in case any get past the lips. It is hard to keep this in place, though, since the shaft often slides out when you change the impeller.

I had a Johnson pump that had an external circlip instead of an o-ring thrower. It did the job perfectly well

 

[RMC]

Cheers , I realise the possibility of the weep holes being blocked by misplaced lip seal. Glad to know I don't need to go bilge fishing for a non existing pin also . Any thoughts on a homemade poker gasket or in a genuine Bukh one a must...

I made a poker gasket from 1.5mm think industrial gasket material and used some blue gasket paste to stop the usual slight seepage that occurs.