Case/Davis trencher backhoe

[Eugen]

Here's a close up of the end of the hose. Is it what you think it is?

[Timj]

Here's a close up of the end of the hose. Is it what you think it is?


E9546D01-FEEF-471E-A3E5-40CA7A049154.jpeg

I think so, there was some old crimped on fittings that looked like that too.
The field repairable are like this:

See if you can unscrew the inner part out of the outer.

Then the outer will unscrew off the hose. The ones I have the outers are left hand thread.

[Eugen]

That’s great work@Eugen !
I’m glad you were able to get your revenge on that pin!

I’m not sure if you are someone else has been able to list o-ring and seal sizes for these backhoe cylinders and the front bucket dump and lift cylinders. If not could you show them when you can? I appreciate it!

Thank you Jeff! I do not know of anyone to have listed the right parts for these cylinders, but I intend to make it public as soon as I have the full list, just like I did for the 644 loader. The list of seals and o-ring I used on my 644 loader cylinders are in that thread but I'll send it to you if you need it so you don't have to search for it. I don't know if over the years the same cylinders were used on all loaders though.

One thing about the backhoe, it had several very different types of cylinders. Can you show me a picture of the top of the gland on yours? It may be different than mine. Mine is this one:

Have a look at this manual on page 48, and see which of the cylinders you have. Look at the way the gland is locked in.

http://eastmanind.com.mytempweb.com/Lin ... &tabid=196

[Eugen]

Thanks @Timj , I'll try to unscrew one and see what's what. Maybe I got lucky.

[Eugen]

What kind of wizard are you @Timj !?

I'd have thrown them in the dump. If I can use them it'll certainly save me some $$

[Timj]

What kind of wizard are you @Timj !?


F2517269-C2FF-46A5-8B64-E25107D4314E.jpeg

I'd have thrown them in the dump. If I can use them it'll certainly save me some $$

There's hose that's spec'd for using them. Yes if you can reuse them you should save some bucks, bulk hose isn't too bad compared to made up lines.
I don't know how they are with that across the border shipping and fees but I used Discount Hydraulic hose.com last year when I was doing the selector valve, very reasonable. I like the local Carquest, they usually have what I need and make it while I wait but Discount was a third the price and spot on. Four days from out east.

[JSinMO]

That’s great work@Eugen !
I’m glad you were able to get your revenge on that pin!

I’m not sure if you are someone else has been able to list o-ring and seal sizes for these backhoe cylinders and the front bucket dump and lift cylinders. If not could you show them when you can? I appreciate it!

Thank you Jeff! I do not know of anyone to have listed the right parts for these cylinders, but I intend to make it public as soon as I have the full list, just like I did for the 644 loader. The list of seals and o-ring I used on my 644 loader cylinders are in that thread but I'll send it to you if you need it so you don't have to search for it. I don't know if over the years the same cylinders were used on all loaders though.

One thing about the backhoe, it had several very different types of cylinders. Can you show me a picture of the top of the gland on yours? It may be different than mine. Mine is this one:

Screenshot 2023-04-02 at 14.26.37.png

Have a look at this manual on page 48, and see which of the cylinders you have. Look at the way the gland is locked in.

http://eastmanind.com.mytempweb.com/Lin ... &tabid=196

No need to dig up the specs for the front end loader yet. I’m not ready to pull it into the shop and start in on it. Since I got it going and started using it all of the cylinders are now either weeping or outright leaking. I’ll have to remember to look on your 644 thread when I get ready to work on it. Or I may ask you again if I forget!

On the backhoe all my cylinders look to be the same. Looks like the hoses mount the same and the glands all look like this.

[Eugen]

@JSinMO That's a different looking gland cap than mine. When the time comes you take it apart and I can show you how I measure mine. All you need is calipers, quite easy as it's very very unlikely that you don't have standard sizes o-rings and seals. The standard sizes are quite different in measurements so it's really hard to mess it up, in my opinion.

You could also take it all disassembled to a local hydraulic shop and they'll figure it out. I like doing it myself but not everyone is like that.

[thebuildist]

I think that's the kind you're supposed to remove with a hammer and a flathead screwdriver. You put the tip of the screwdriver in one of those four holes and pound it in a counterclockwise fashion.

On reassembly for proper torquing you have to use a certain size hammer swung from a certain distance to get the gland just to a certain tightness...

[Eugen]

@JSinMO a quick look and it looks like you have the G34186 cylinder and the kit for it is 1543313C1 so maybe it's really easy for you to get that.

@thebuildist well, I do have the right tool for that, but Jeff is far away from me but it's pretty cheap. There are two sizes, model 1266 and 7463. I got the pair from amazon, but you could get only the size you need. The little one goes up to glands 3-3/4 diameter.