MOTOBRICK.COM

TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: kjott on January 01, 2020, 04:14:41 PM

Title: Reuse of shaft in water/oil pump K100
Post by: kjott on January 01, 2020, 04:14:41 PM: Hi!

I'm currently rebuilding the water/oil pump on my K100. Do you guys think its possible to reuse the shaft with the amount of pitting shown at the attachment?
Title: Re: Reuse of shaft in water/oil pump K100
Post by: johnny on January 01, 2020, 04:50:15 PM: greetings...

did you know inge karlsen from fredrikstad norway... (http://www.motobrick.com/index.php/topic,12113.0.html)

thanks for the photo... some will say smooth it out and roll with it... if it was my brick id replace it...

i dont wanna be 2000 miles from home and have that failure... final drive or drive shaft ok because i gotts spares that can be frdexed... butts not that... and my aaa aints good for 2000 all at once...

j o
Title: Re: Reuse of shaft in water/oil pump K100
Post by: kjott on January 01, 2020, 05:31:44 PM: Ah, OK. In general, is the leakages coming from bad seals or a bad shaft like mine then?
I think the bike had oil in the water, because the walls inside the pump had a black layer to it (recently bought it).

Nope, did not know Inge :/
Title: Re: Reuse of shaft in water/oil pump K100
Post by: Imlhaas on April 11, 2020, 12:28:37 PM: What did you do? I am looking at a similar issue and am unsure if I should use or replace the shaft. Inside of this pump was clean, just oil from the weep hole.
Title: Re: Reuse of shaft in water/oil pump K100
Post by: volador on April 11, 2020, 01:04:27 PM: Welcome. A closer pic would be helpful

Shaft looks like some minor discoloration. If it is not badly scored or pitted would reuse it. Smooth out with fine steel wool or Scotch-brite pad
Title: Re: Reuse of shaft in water/oil pump K100
Post by: Imlhaas on April 11, 2020, 02:25:30 PM: Here is another picture- It is hard to photograph. I did clean it up, you can feel imperfection with your nail, but not deep or sharp pits.
Title: Re: Reuse of shaft in water/oil pump K100
Post by: kjott on April 11, 2020, 02:28:03 PM: I took a chance and reused it. The bike is still in assembly-mode, and therefore not tested to see if I did the rigth thing icon_cheers
Title: Re: Reuse of shaft in water/oil pump K100
Post by: kjott on April 11, 2020, 02:34:17 PM: I filled the imperfections with superglue and smooted it that way. Dont know if thats a great solution over tlme... guess the answer will apear after startup :)
Title: Re: Reuse of shaft in water/oil pump K100
Post by: volador on April 11, 2020, 03:26:11 PM: Quote from: kjott on April 11, 2020, 02:34:17 PM
I filled the imperfections with superglue and smooted it that way. Dont know if thats a great solution over tlme... guess the answer will apear after startup :)

Bravo ingenious use of superglue!
Title: Re: Reuse of shaft in water/oil pump K100
Post by: volador on April 11, 2020, 03:30:58 PM: Quote from: Imlhaas on April 11, 2020, 02:25:30 PM
Here is another picture- It is hard to photograph. I did clean it up, you can feel imperfection with your nail, but not deep or sharp pits.

Looks good reuse without fear
let us know how is works out
Title: Re: Reuse of shaft in water/oil pump K100
Post by: Imlhaas on April 11, 2020, 06:48:26 PM: Put it back together drove it about 25 miles no leaks. I had been getting about 4 drops of oil when I would stop and a wet oil pan.
Title: Re: Reuse of shaft in water/oil pump K100
Post by: volador on April 12, 2020, 12:59:29 PM: Quote from: Imlhaas on April 11, 2020, 06:48:26 PM
Put it back together drove it about 25 miles no leaks. I had been getting about 4 drops of oil when I would stop and a wet oil pan.

You use any sealant on the mating surfaces?
Title: Re: Reuse of shaft in water/oil pump K100
Post by: Imlhaas on April 12, 2020, 05:24:59 PM: I used Three Bond 1207b for the gasket material pump to engine and cover to pump. I was surprised how easy it was to work with. Put about 50 more miles on it today and found a bit of a drop at the weep hole, not enough to drop off and none on the oil pan. Not sure if it was from the assembly grease or seeping, but I can live with that.