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I'm trying to find out more information (like specs, build year, sub-type (industrial or not) on a Kubota D950 engine, serial number D950-590082. Any suggestions?

The charge pump inner impeller (gerotor) was not reproducible, according to the machinist. I'm waiting to hear back from an outfit in Tupelo, Mississippi that rebuilds HSTs to see if they can get the part for the charge pump, which is manufactured by Kayaba. In the meantime, I used the impeller...

Mine is a D950-LA-H; is a D950-BW interchangeable with it if it has the opening in the injection case for the hydraulic pump? It came off a Jacobsen fairway mower.

That's what I needed to know! I may go with a remanufactured D950, or ship mine off to be reman'd. Are all D950s interchangeable?

Is it possible to replace the main bearings in the D950 on a B7200 without removing the crankshaft?

I found a used B7200 HST to pull the charge pump rotor from. I know of one other person that the only thing wrong with their HST was a shattered charge pump rotor (and probably sheared key). I'm thinking that when I get the intact rotor I'll see if a machinist can duplicate it. How common is it...

What is your opinion of need to rebuild the engine due to the marginal oil pressure?

The mechanic also thinks he's hearing piston slap, so the cylinders may have to be bored and oversized pistons installed.

We pulled the charge pump off the front of the HST. The rotor was shattered and the key sheared. Now I'm looking for used parts to avoid the $1600 price tag for the entire HST.

Can an HST from a B7200 be rebuilt?

Is there any way to test a used HST that was pulled from another B7200?

Thanks; I had completed all of those except the bearing clearances. My Kubota mechanic says it will cost big bucks to tear down and check all clearances; he doesn't think it is worth it!

So are worn bearings the only other reason for low oil pressure? What if I do nothing and run with the marginal oil pressure? What more damage can it do?

I have been chasing down the cause of low oil pressure on my 1986 B7200 HST 4WD. I've changed the sending unit, pulled the timing cover to inspect the front cam plug (it was intact), replaced the oil pump and oil pressure relief valve, but still have only about 12 psi (at idle) and 24 psi (at...

B7200 HST Charge Pressure What was the end result; were you able to rebuild your HST? I have the same problem; the transmission works fine except on a grade or really loaded. The dealer tested and the charge pressure is zero. The screens are clean, so they say the only option is a new HST...