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I'm looking for a driveshaft for a Kubota RC60-21B MMM (actually I only need the half that connects to the tractor mid-PTO, the other half is attached to the MMM gearbox).

I can order the parts new from my local Kubota dealer but they are quite expensive. Can anyone suggest a salvage yard or does anyone know if an aftermarket driveshaft might work?

Kubota RC60-21B MMM
Kubota Tractors
Replies 7 Post by ChrisG

WOW, lot's of feedback and advice! Thanks Murf and TomG!

Let me try to summarize the situation again, responding to your previous responses as I can best describe them. Thanks for the education and your help.

- What I've previously described as the 'remote valve' is the valve on the fender that is run from the auxiliary ports on the tractor's hydraulic manifold block.

- What I've previously described as the 'directional valve' is what I think TomG refers to as the diverter valve. The valve is located-on/part-of the tractor's hydraulic manifold block.

- 3PH lowers using the position control lever

- 3PH raises by first placing the 3PH position control lever in the 'up' position and then moving the remote valve (diverter valve on the hydraulic manifold block in normal position)

- The remote valve is connected to the hydraulic manifold auxilary ports using 2 hoses. It is connected to the 'to pressure' and 'to tank' ports as identified in the B2150's Operators Manual. The 'to neutral' auxilary port is not used.

- I don't know (lack of understanding) if the remote valve is a power beyond type. The valve appears to have 3 ports, 2 hooked up as described above, and one that appears to be capped. The 2 ports that are hooked up are labeled but I don't recall what they say or which runs to which auxiliary port on the hydraulic manifold block (I'm at work and the tractor is at home, so I can't check till later). There is a screwed on cover in the line of the valve action and 2 couplings for hooking up an auxiliary implement. I don't recall seeing a brand or model anywhere.

- The tractor has concrete/cement spatters around the 3PH, rear PTO and ROPS. The tractor may have been used with a 3PH concrete mixer, but I don't know that for sure. I don't know how a 3PH concrete mixer works, but could it be that the 3PH was just a support and the remote value used only to dump the concrete, with the PTO turning the drum?

- The remote valve is self-centering (can be moved forward or back from the center position and springs back to center once you let go). I don't believe that the valve has a detent position at TomG described (again, I'm at work). I assume that I would have noticed any aditional movement and 'click'.

- The 3PH will raise by moving the remote value to either the forward or back position (it raises both ways), but the 3PH position control lever MUST be in the up position, first.

- When the diverter valve is turned to auxiliary, the relief valve operates and the 3PH will not lift.

I hope I was clearer in my descriptions and terminology. Thanks for any additional feedback.

3PT Hydraulics Problem - Kubota B2150
Kubota Tractors
Replies 14 Post by ChrisG