KAD32 Raw Water Pump overhaul

[oGaryo]

Down the boat to finish off the annual maintenance of the KAD32's with this year being a major service to change all filters including the crankcase breather, engine oil change, fresh water coolant change, compressor oil change, belts, adjust tappets and lastly, the impellers. On the latter, they're stuck solid to the shaft and as I noticed a small drip of water from the rear of the Raw Water pumps, I've taken off the entire pump from both engines to take home and overhaul.

Are there any do's and don'ts with these pumps when performing an overhaul?

thanks Gary

 

[neale]

They are quite simple to take apart. I wrote it up once for mbm when I was changing the seals. These are what cause the drips from behind. If the bearings are ok and the shaft us not scored you may get away with just new seals. Buy ones with stainless steel springs. The original Volvo ones had mild steel which is why they don't last long before leaking. If you have back issues of mbm handy I'll see if I can find the issue date.

 

[neale]

June 08 was the issue. I got my stainless sprung seals from www.simplybearings.co.uk. Seal size for kad32 pump is 16mm inside diameter, 28mm outside diameter and 7mm thickness. Shaft and bearings are available from VP as an overhaul kit if needed.

 

[oGaryo]

June 08 was the issue. I got my stainless sprung seals from www.simplybearings.co.uk. Seal size for kad32 pump is 16mm inside diameter, 28mm outside diameter and 7mm thickness. Shaft and bearings are available from VP as an overhaul kit if needed.

7

Thanks, I'll have a dig through my back issues to take a look.

cheers Gary

 

[spannerman]

If the shaft is scored you can sometimes get away with mounting the seal a millimetre or so either way so the new seal runs on smooth shaft.

 

[superheat6k]

You might find this useful ...

https://www.dropbox.com/s/0w6acer1s8qtu87/Johnson Pumps (detailed).pdf?dl=0