Oring on banjo bolt?

[valley]

Greetings, Have you ever used an Oring where a rubber clad metal washer is leaking on a banjo bolt? The leak is oin the hydrolic system.
I fairly sure I read a thread where an Oring was used. Did your leave the washer in also? Thankyou

Richard

 

[bjr]

I wound up replacing my washers on my hydraulic suction side where there's no pressure with some extra thick nylon washers that I had purchase from a kinda like a Tractor Supply place. I found them in the hardware assortment bins located on top of the bolt bins. There's no leaks. I wouldn't mind using the rubber coated washers but it seems only the Jinma manufacturers use those. No one 'round here "ever seen anything like that". Post back if any one knows a source. bjr

 

[MisterJim]

I had a similar problem on my Jinma (FarmPro 2420) and I went to a local hydraulic hose repair dealer and they had the rubber coated washers in stock. I put these on and no more leaking problems. A very easy fix and it didn't cost too much. I replaced all of them while I was at it and I think it was around $20 for all of them (8 or 10). I live in Northern Ohio but I think any business that works on hydraulic equipment would be able to find you these rubber-coated washers.

 

[Rich Waugh]

Ronald at Ranch Hand Supply carries the bonded seal washers.

 

[greg_g]

No one 'round here "ever seen anything like that". Post back if any one knows a source. bjr

Japanese motorcycles use them, likely in metric sizes as well. And I don't think I'd have to dig too deep into my spares box to find some either.

//greg//

 

[oldnslo]

Greetings, Have you ever used an Oring where a rubber clad metal washer is leaking on a banjo bolt? The leak is oin the hydrolic system.
I fairly sure I read a thread where an Oring was used. Did your leave the washer in also? Thankyou

Richard

Some metric ports and almost all BSPP ports have a metal washer with an O-ring inside of it for sealing. Just and O-ring with no support will not work unless it is static condition at atmospheric pressure.

Depending on sealing surface and operating pressure brass and or aluminum washers will also work on Banjo bolts.

Just a word of caution: Banjo bolts will not withstand lots of torque so don't go crazy when tightening them.

Roy

 

[valley]

I had a good number of the rubber clad metal washers. I looked for them today, they are not with the other tractor parts. I must have put them in a very safe place.

greg current John Deere owner. John Deere? You excite my envy.

 

[Affordable]

We also keep just about every size of the rubber coated washers from 10mm - 24mm

Tommy
Affordable Tractor Sales
"Your Jinma Parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[RonMar]

Yep, an O-ring needs support, so is usually installed in a machined groove. In a pressure application an outer washer/collar would provide this support and control O-ring crush. Basically perform the same service as the rubber sectioned washers.

 

[valley]

In this case the banjo fitting is bolted onto a flat surface, no inset.

 

[greg_g]

greg current John Deere owner. John Deere? You excite my envy.

Yup. Traded in the KM454 and TS354C on a new JD3720 cab with 300X loader and 4-in-1 bucket

//greg//

 

[valley]

Yup. Traded in the KM454 and TS354C on a new JD3720 cab with 300X loader and 4-in-1 bucket

//greg//

Good for you greg! It looks great. I'm sure it's a pleasure to sit in.

 

[RonMar]

In this case the banjo fitting is bolted onto a flat surface, no inset.

So it would require the use of the rubber insert washer, an O-ring with a outer containment collar, or a copper disc washer to provide a seal...

 

[greyfoxxca]

I just had to deal with a couple of these washers. I had to fix the leaks in the field. I removed all the rubber from the washer and wrapped it with teflon tape. Thats right round and round the washer with teflon tape. Put them back on and tightened them up. No Leaking at all. will be doing all fittings this winter when I get the time.

George

 

[Rich Waugh]

I'd be really dubious about doing that Teflon tape thing on a pressure circuit where tight tolerances are encountered. In compressing that wad of Teflon it is just to easy to get small bits of it torn off and into the fluid where they go on to clog up a pressure relief valve, spool valve or other critical component.

It is well known that Chinese rubber goods suffer short working lives. Why not just order some US-made bonded washers from McMaster-Carr or MSC Industrial Supply and not have to worry about it?

 

[Bob Rooks]

I removed all the rubber from the washer and wrapped it with teflon tape. Thats right round and round the washer with teflon tape. Put them back on and tightened them up. No Leaking at all. will be doing all fittings this winter when I get the time.

Nice field fix George but I think you realize that it's a one-time shot. I would advise to not do all that way. Best to carry spare bonded washers or an assortment of copper or aluminum washers, they're cheaper than you think:
80 Piece Copper Washer Assortment

I second what Rich says about the judicious use of Teflon tape.

 

[greyfoxxca]

appreciate your replies guys. I did not believe that the teflon spread one layer thick around the washer would ever travel through the threads into the oil system. I will leave those washers alone and see if they are a good fix.

I would certainly install copper washers if found the correct size. Has anyone got the size washer needed. My tractor is back together and in use so I would like to get washers before downtime.
I do think teflon is better than the original rubber coated washers. I would never reinstall the rubber coated washers.

george