JCB 801 Valve/Spool connection advice

[JBASport]

That is so helpful. Thanks again for all your input. Really appreciated. Take care, Terry

 

[V8Druid]

That is so helpful. Thanks again for all your input. Really appreciated. Take care, Terry

no prob.s ... 's what this place is for ... knowing what stuff is called is half the battle - and what's out there/available
the pic is some of the plumbing in a very tight spot in my VA-r build

 

[JBASport]

I thought I would give you an update on the installation of the new spool valve, There is a hose in the picture that is temporary as I am struggling to find what I believe are 3/4" UNF blanks. And Eureka, tried it and it works. Thanks again for all your help. Terry

 

[Mick-the-fitter]

Looks quite pretty Terry, maybe start making JBA mini diggers! Where are the 3/4 blanks going.

 

[JBASport]

Thanks. The 3/4" blanks are to replace the old temporary hose that I had to fit once I diverted the slew lines to the new valve. The old hose with the wrapping hanging off just acts as blanking for the 2 redundant ports just so I could test the system. The blanks I got were not satisfactory, as there wasn't enough shoulder for the 'O' ring to seat against, so when I tightened the blank, they kept squishing out. I managed to seat 3 of them, but I am not confident they will last so will replace them once I source proper blanks. Any idea where best to source them? Thanks again.

 

[JBASport]

I have attached a picture of the 2 plugs. The black one is the original and shows the wider shoulder for seating the 'O' ring. In the manual it refers to the ports in the valve block as being 3/4" - 16 if that helps? Terry

 

[craig]

I have attached a picture of the 2 plugs. The black one is the original and shows the wider shoulder for seating the 'O' ring. In the manual it refers to the ports in the valve block as being 3/4" - 16 if that helps? Terry

I would hazard a guess that they are JIC fittings, a 3/4 JIC has 16tpi unf.
If you use a bonded seal/dowty washer, rather than just an O ring, you should be OK with what you have.

 

[Shovelhands]

I would hazard a guess that they are JIC fittings, a 3/4 JIC has 16tpi unf.
If you use a bonded seal/dowty washer, rather than just an O ring, you should be OK with what you have.
View attachment 25737

Dowty’s don’t always work where there should be an O ring, due to the tapered seat just before the thread.

 

[V8Druid]

and that's a cone plug anyway ... need a square ended with a bigger head ...

 

[Mick-the-fitter]

Can you not fit the original adaptors for the hoses back into the block and then cap those?

 

[JBASport]

Any thoughts on where to source proper 3/4" UNF blanking plugs for above in the UK? I live in Scotland and all the ones I have see online seem really expensive and I only need about 4. Thanks, Terry

 

[V8Druid]

Any thoughts on where to source proper 3/4" UNF blanking plugs for above in the UK? I live in Scotland and all the ones I have see online seem really expensive and I only need about 4. Thanks, Terry

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[JBASport]

Many thanks

Cheers
Terry

 

[V8Druid]

Many thanks

Cheers
Terry

buy on line ... waaaay cheaper than ordering over the phone

 

[JBASport]

Thanks for that