Loader leak down.

[CJONE]

Technically correct.

But in the context of this thread, I assumed (maybe wrongfully) the valve-to-spool body sealing surfaces is what was being talked about. Even though technically there isnt a seal there.

:confused3:

 

[CJONE]

I have seen this tolerance from different manufacturers on the valve spool to bore clearance on hyd valves when new.

Excerpt:

0.0002" diametral clearance is about the "Goldilocks zone" for hydraulic spool valves. Any looser and they leak down, Any tighter and they stick.


Then you have heat and cold, viscosities differences, and also wear and tear.

And someone overtightening the valve bank causing it to stick then calling and complaining because of what they did messing it up. That was one of Fridays calls, oh joy. CJ