Cat 312 aux spool and related pilot line question

[mclean]

Are the capped ports the aux circuit, or is there more to this than it seems.

Where are the pilot lines going? They're in an oily abyss, not too keen on tracking by hand if anyone knows where they go..

I've got the under cab plates off and can't find any capped hoses.



Thanks for any guidance!
Chris

 

[mclean]

Ok, so they're just hooked up top to bottom .. Should have grabbed first.

This is the aux Port though?

Chris

 

[Mobiltech]

Ok, so they're just hooked up top to bottom .. Should have grabbed first.

This is the aux Port though?

Chris

Yes the ones that are plugged off are the aux ports.

The pilot line is looped so no pressure builds up at the end of the spool and the valve stays in neutral.