Super A hydraulic pump

bobrose · Aug 29, 2016

My pump was leaking hyd fluid into the engine oil. I took it apart and found the o ring was shot but also wore a grove in the pump drive gear shaft. There's not enough clearance for a wear sleeve. Can metal be welded to the shaft then machined back to original OD?

Steve@Advance · Aug 29, 2016

Welcome Bobrose!

Never had much success trying to build one up. True welding gets the shaft too hot. That is a precision made shaft, the heat from welding will warp the shaft. There are some spray-weld type repairs that don't apply as much heat, but it's just a surface repair, and very likely to flake off, getting into places it shouldn't!

I would either try running it like it is, see what happens. Or try to find a better used one. Or spring for a new one.

Or, any way to shift the shaft forward or backward enough to get a new surface for the seal to run on?

Bob · Aug 29, 2016

I would try posting on the IH-specific board lower down the page. Seems to me guys have posted there about success using a certain # Speedi-Sleeve.

Don't know if that's possible in all versions of pumps used on that tractor, but pretty sure at works on at least some.

teddy52food · Aug 30, 2016

I have welded them up with mig & turned them to std. I think tig would be better yet.

gidtex · Aug 30, 2016

Tig weld it about 1/4 or 1/3 of the way and
let it cool between welds.a good tig welder
can weld a very small bead.thats how i
repaired my 5 years ago still working today

bobrose · Aug 30, 2016

(quoted from post at 14:49:55 08/30/16) I have welded them up with mig & turned them to std. I think tig would be better yet.

Thanks, that's what I'll do

bobrose · Aug 30, 2016

Thanks, I'll do that

Super A hydraulic pump

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