JD Fitting Adapters

Traditional Farmer · Oct 15, 2020

Looking at the loader on the JD 855 going to need to replace some hydraulic lines.Where can I get some adapter fittings to change from JD style fitting to
NPT fittings?

caterpillar guy · Oct 15, 2020

IF they are just JIC type try surplus center or Bailey sales and there is Discount Hydraulic I think it is has lots of fittings. Might try all three as some will be cheaper for some than others.

leroy in ne · Oct 15, 2020

Checkout Baum Hydraulics in Omaha, NE. See their website for info.

Brendon-KS · Oct 15, 2020

Personally I view NPT as the bottom-of-the-barrel when it comes to hydraulic connections and for sure wouldn't use it to replace more advanced joint designs. If by "JD style" you're referring to JIC as caterpillar guy suggested (as far as I know Deere does not have their own proprietary fittings) then I'd definitely stay with that. JIC is a proven design that is simple and reliable. Just don't over-torque them during reassembly - if JIC fittings leak it is almost always because someone thought that tighter was better and the sealing surfaces were damaged.

Jim.ME · Oct 15, 2020

If you are looking at the actual end fittings on the loader hoses, I believe they are standard industry fittings, not JD specific. There are a number of different types and sizes of ends used. You don't say which loader you have, or describe the fitting, but from looking at the parts catalog for a 70A it appears those are using O-ring boss hose end fittings. These can be SAE or metric. If they are SAE, the threads match fine thread bolts and nuts (metric should match to the pitches of various metric bolts), which you can use to determine the size you need for that end and you then specify the NPT size you want for the other side.

If that is what the hose ends are, you will be looking for Male O-ring boss to female pipe swivel adapters of the appropriate sizes.

Texasmark1 · Oct 15, 2020

I got mine at TSC.....pricy.

fastfarmall · Oct 15, 2020

I put triple hydraulic on one tractor 4-5 years ago, so i bought 6 fitting and they are 90* elbow's,the kind that come out of the control valve, one has leaked all this time, when in use,so i got to take that off and pay the piper again,wont be no warranty on that, i am sure, this one is going in the garbage.

Keith Molden · Oct 15, 2020

I have some that I bought at an auction that I would part with cheap. I don't have any J.D. tractors or equipment except a 3 pt rake that don't need hydraulic fittings. Shoot me a phone # and we can talk about them

Hayfarmer · Oct 15, 2020

I have bought quite a few hoses and fittings at Surplus Center, they should have those adaptors

Traditional Farmer · Oct 15, 2020

You fellows were right they are JIC fittings.Looking at hoses for sale how do I know if I need a JIC 4 or JIC 6 end? These are the hoses running from the tractor at the disconnects to the first metal lines on an 855 with a model 52 loader.

Brendon-KS · Oct 15, 2020

-4 JIC fittings have 7/16" threads and the -6 has 9/16". The -4 would be the standard size for 1/4" hose and the -6 would be standard for 3/8". Jump size hose couplings are commonly available if you need to do something "non-standard".

Brendon-KS · Oct 15, 2020

Just as an FYI the torque spec for -4 JIC fittings is 11-12 ft-lb and for -6 it is 18-20 ft-lb. You of course can't use a regular torque wrench on hydraulic fittings unless you use a crowfoot and do the offset calculations but this still gives you an idea of how tight to go even when using a regular open end wrench. As I indicated down below these fittings are super-reliable if tightened properly but if overtorqued they are typically ruined and will leak. What often happens is they are overtorqued from the beginning and the resulting leak makes a person think they are too loose which leads to even more tightening. If this happens a person might get lucky enough to mash the sealing faces together enough to stop the leak but don't plan on re-using the fittings if they are ever taken apart again.

SVcummins · Oct 15, 2020

Measure them will till you whether its a 4 or 6

SVcummins · Oct 17, 2020

No.4 is 1/4 pipe size
No.6 is 3/8 pipe size
No.8 is 1/2 inch

SVcummins · Oct 17, 2020

Jim.ME · Oct 17, 2020

The size slots in your earlier pictures will be close, but the BSP threads are not the same as our NPT threads. I have seen things damaged from trying to force NPT and BSP threads together. Here is a chart that gives a good bit of info to help identify many different fittings.

https://www.hydraulicsdirect.com/Fitting-Thread-Chart-s/1934.htm

SVcummins · Oct 18, 2020

No they are not the same but that is way you can figure out
what no. Jic you have

JD Fitting Adapters

Traditional Farmer

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caterpillar guy

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leroy in ne

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Brendon-KS

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Jim.ME

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Texasmark1

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fastfarmall

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Keith Molden

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Hayfarmer

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Traditional Farmer

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Brendon-KS

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Brendon-KS

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SVcummins

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SVcummins

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SVcummins

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Jim.ME

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SVcummins

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