B 1550 Hst. Power steering crapped out.

[Harry Newiger]

B 1550 Hst. Power steering crapped out. Works when loader is dead headed. Loader works fast when you try to steer. Priority valve???

 

[North Idaho Wolfman]

Yea it sounds like it might be, pull this apart and check all the parts.

 

[Harry Newiger]

Pulled apart priority valve and found 2 nicks by the taper in the bottom valve that screws into the block. Doesn't look machined, to irregular. About 1/4 inch long. Anyone seen this before?

 

[North Idaho Wolfman]

One thread on this issue will do.

Why don't you reference the above pic and give use the number of the part your talking about.

 

[Harry Newiger]

Part number 220. At the end of the threads is like a tapered seat

 

[Harry Newiger]

Where can I find a hydraulic schematic explaning how this diverter works.

 

[Harry Newiger]

Yea it sounds like it might be, pull this apart and check all the parts.

View attachment 152210

Hi Mr Idaho Wolfman. What exactly wears out, breaks or goes south in this valve. Parts are no longer available but I have access to a fully decked out machine shop and am able to reproduce as necessary. Thanks. Harry.

 

[North Idaho Wolfman]

I've never heard of anything that specifically goes wrong with them.
The most common failure of a valve like this is broken springs.

I'm pretty sure Part Number 220 is only a cap it's not a valve or anything more than a way to keep all the parts of the valve in it.

The WSM (aka service manual) covers the valve operation.
You can get a copy of the WSM on Kubotabooks.com, under tractor operation.

 

[Harry Newiger]

Part 260 screws into 220. All the parts in the red box make up a cartridge that screws into the valve body.

 

[North Idaho Wolfman]

If everything in that valve looks good, then the problem is in the FEL valve or the PS unit.