863 aux stem pressure

[grandscapesllc]

Still trying to figure this out. What actually supplies pressure to the stem valves to move the spool in?

 

[grandscapesllc]

Trying to figure the fluid flow direction on the auxiliary side. Does charge pressure enter the stem valves here through these tubes?

 

[grandscapesllc]

Any thoughts on this?

 

[grandscapesllc]

Anyone have a schematic of the control valve? seems there is not enough pressure to move the aux spool

 

[brdgbldr]

Here is a link to the parts catalog. The schematics may help:
https://partscatalog.bobcat.com/

You could have a bad relief valve.

 

[grandscapesllc]

Here is a link to the parts catalog. The schematics may help:
https://partscatalog.bobcat.com/

You could have a bad relief valve.

Thanks, I have look there many times but am looking for more detailed diagram of the fluid path through the control valve

 

[brdgbldr]

Still trying to figure this out. What actually supplies pressure to the stem valves to move the spool in?

Not exactly sure of what your problem is.
If the machine is electrically controlled then solenoids move the stems.

If the machine is mechanical then the linkages move the stems.

 

[grandscapesllc]

How does pilot pressure reach the auxiliary stem valves exactly. After all my research and testing it seems like there is not enough pressure reaching the stem valves. My charge pressure into the bics control block is about 360psi warm at idle. On the pic, is this pipe the bleed off for the spool ends? Does fluid return back through the stem valves in these lines wich are plumbed into the lift bypass and drive motor?

 

[grandscapesllc]

Bump