Cut Off Valve Question Yanmar B27 2a Mini Excavator

[mnailor]

Hello,
This is my first post and I'm new to Hydraulics and excavators.

I recently purchase a Yanmar B27 Mini Excavator without any manuals but have purchased a service manual since.

First question is about operation. It has a lever (kind of like a stick shift that would go between two gears) that I believe connects to the Cut Off valve. Does anyone know what this is for? I thought it was a high low gear shift but found out that the two speed operation is achieved with a pedal?

Second question, while I was moving the machine I shifted the lever in question and now my Boom is not operational. The cut off valve that I think connects to the above lever has a cylinder (spool?) that is projecting out of it? Any ideas on how to fix the problem and what the cut off valve is for would be appreciated.

Thank you,
Mike

 

[IceStationZebra]

I am not familiar with that excavator and you didn't mention where in the world you are...but some of these machines have a means to switch the controls from ISO to SAE (or excavator vs. back hoe) style controls. I believe the fore/aft controls stay the same but the left/right functions switch sides - dipper and bucket. ISZ

 

[MisterGee]

Hi Mike,
I just bought a Yanmar B27 myself and am looking for a service/shop manual for the machine. I see that you found one, can you direct me as to where I might get one too?

How did you resolve the boom problem?

Are you happy with the machine?

Thanks...Gee