Dual 3rd Function

[dstig1]

Oopsie. Read it too fast I guess.

 

[helmdog25]

So I've been making some slow progress on the build of my "Dual" system. I am realizing this was probably an "over kill" project, but it was always a more of a "could I" than a "should I". Thought I'd upload a few picts.

 

[helmdog25]

Frankly, the biggest issue I'm having is figuring out all the fittings. JIC, ORB, NPT = PTSD.Then there's fittings labeled sometimes in fractional sizes 1/4, 3/8, etc, and sometimes in "dash" sizes -04, -06, etc. That one I did figure out, dash size are just fractional expressed as the numerator of the fraction in 16ths (not confusing at all).

I'm primarily using 3/8 hose and 3/8 JIC. The components break down as:

• Controller (for independent 3rd funct) uses 1/2 SAE ORB (-8) for the pump and tank ports, and 3/8 ORB (-6) for the A/B ports.
• Diverted 3rd func has 3/8 ORB
• Output selector (just another diverter) uses 3/8 NPT

The existing loader lines are JIC, 5/16 I think, or maybe 1/4. the hoses are 1/4. The loader control valve and rear remote control valve seam to be ORB, but smaller than 3/8.

This is where things get confusing to me because it seems what the fitting dimension charts say and what I'm measuring don't match. If you look at the chart in the image, it says that a 3/8 ORB fitting should have a 9/16-18 thread, with the male OD as 9/16 (.56). But when I measure a fitting I have that is a 3/8 JIC to 3/8 ORB, the outer thread measures .739. See image.

A plug from a port on the loader control valve measures .638, which is between 5/8 & 11/16. Threads seem to be 20 per inch, which would indicate a 5/16 or 1/4 ORB.

I think the JIC chart matches up okay, the existing loader hoses mate to a 5/16 JIC which does measure .494 ~ 1/2. And the 3/8 fittings I have are .55 ~ 9/16. That aligns with the chart.

Any fitting experts out there want to help clear this up?

 

[dicktill]

Frankly, the biggest issue I'm having is figuring out all the fittings. JIC, ORB, NPT = PTSD.
<snip>
But when I measure a fitting I have that is a 3/8 JIC to 3/8 ORB, the outer thread measures .739. See image.
<snip>
A plug from a port on the loader control valve measures .638, which is between 5/8 & 11/16. Threads seem to be 20 per inch, which would indicate a 5/16 or 1/4 ORB.

Wow, you have quite the mess there.

The first fitting is obviously not correct; it should be 9/16-18 on both sides, the JIC side with a cone and the ORB side with a flat end and a flange with O-ring. Not sure what you have there.

The plug might be 3/8-19 BSPP.

Try using this chart to help identify: Fitting Thread Chart | Hydraulics Direct

Good luck with the fittings and the project.

 

[ptsg]

You can stack those diverter valves together with just two o-rings to seal both ports between both diverter valves.

This would simplify the system a lot, with less hoses, fittings and space used.

 

[jonsstihl]

are you respecting the min bend radius of the hydraulic hoses, seems awfully tight.

 

[dstig1]

You can stack those diverter valves together with just two o-rings to seal both ports between both diverter valves.

This would simply the system a lot, with less hoses, fittings and space used.

What he said...+1

 

[JeepHead]

I plumbed in a 2 spool valve in to the PB port on my loader valve using the Summit P40G valve. I sent one spool to the front for a 3rd function and one spool to the back to run hydraulic top link. In all it can be done for around $300-400 including hoses and fittings. I have operated this way for over 2 years and absolutely love this setup.

 

[helmdog25]

The first fitting is obviously not correct; it should be 9/16-18 on both sides, the JIC side with a cone and the ORB side with a flat end and a flange with O-ring. Not sure what you have there.

The plug might be 3/8-19 BSPP.

Try using this chart to help identify: Fitting Thread Chart | Hydraulics Direct

Thanks, you are correct, I was just confused. The fitting I have is a JIC 6 - ORB 8 (not 6).

Good call on the plug, after I checked the BSPP specs, that's what it is. I was wondering why none of my thread checkers didn't quite line up, I didn't realize anything used a 19 thread.

Just too many types, undoubtedly a conspiracy to sell adapters

 

[helmdog25]

I plumbed in a 2 spool valve in to the PB port on my loader valve using the Summit P40G valve. I sent one spool to the front for a 3rd function and one spool to the back to run hydraulic top link.

Funny, I considered tapping the second rear remote I already have to use as the 3rd function. Would have been real simple, but I have a very bad habit of taking the hard way out.