New Grapple Stuck!

[pcustoms]

I feel like I am missing something obvious here so please tell me where I've gone wrong....

I'm in the process of installing a diverter valve and building a grapple.

Kioti CK3510SE
Diverter Valve, Flow is from curl/dump into valve, then A/B go onto the curl/Dump. C/D are tired to the grapple cylinder

Curl/Dump works fine (been using it for a week), just wired up the switch and tried the grapple, it only opens. If I try to close, I can hear the relief kick in.

If I swap the lines I can get it to close, but it becomes locked again.

I tried to purge the lines by looping a hose on the couplers.

I've taken the lines off the cylinder (and taken a bath), there's oil in 1/2 the cylinder and its under pressure.

I almost think the couplers (ball style) aren't opening correctly. Not sure how to test this though.

Contemplating switching the curl and grapple lines to see what happens.

 

[pcustoms]

Well after a few hours of playing around and tring to figure out WTF was wrong I remembered I had a few extra fittings and connected straight up (no QD coupler).

Working as it should!

Guess I'll be reaching our to discount hydraulics tomorrow, one of these is clearly not working correctly.

 

[Thomas]

Glad your up and running. :thumbsup:

 

[downsizingnow48]

I had exactly the same thing happen to my grapple with a qd set from surplus center.

 

[pcustoms]

I had exactly the same thing happen to my grapple with a qd set from surplus center.

Well I checkled them out and independently everything seems ok. Put them back on (mainly because it's all I had to seal the hose) and it's all locked up again.

Guessing something is a bit out of tolerance and install allowing the ball check to open.

What brands don't suck?

 

[ericm979]

Parker/Pioneer have been good for me. I like the 4200 series with the release sleeve that works both ways. It makes connecting and disconnecting the couplers easier especially when they're loose rather than mounted to a bulkhead. Safeway also makes good couplers.