Case/Davis trencher backhoe
- Eugen
- Posts: 5166
- Joined: Wed Mar 03, 2021 2:52 pm
- Location: Port Mcnicoll, Ontario
- Has thanked: 12091 times
- Been thanked: 16346 times
- Contact:
Re: Case/Davis trencher backhoe
I think you're right @FUTZ !
The fittings are in pretty bad shape on the outside, rusted. I noticed that on some sides less rust and a letter on the bottom. Out of the many fittings I was able to clean and put together the stamping on the bottom. It says
"Stratoflex 6 2 WIR"
I got excited hoping to find the specs and true recommended hose for the type but it must be so old nothing comes up except that it's a Parker thing.
The fittings are in pretty bad shape on the outside, rusted. I noticed that on some sides less rust and a letter on the bottom. Out of the many fittings I was able to clean and put together the stamping on the bottom. It says
"Stratoflex 6 2 WIR"
I got excited hoping to find the specs and true recommended hose for the type but it must be so old nothing comes up except that it's a Parker thing.
Case 224, 444, 644, 680E
Kubota B26
Kubota B26
- Timj
- Posts: 1445
- Joined: Thu Mar 04, 2021 9:57 pm
- Location: Central WI
- Has thanked: 5223 times
- Been thanked: 5038 times
Re: Case/Davis trencher backhoe
I looked a little closer at the ones I have. So they are for 1 wire hose.
let's go, it's finally time to blow.
- Eugen
- Posts: 5166
- Joined: Wed Mar 03, 2021 2:52 pm
- Location: Port Mcnicoll, Ontario
- Has thanked: 12091 times
- Been thanked: 16346 times
- Contact:
Re: Case/Davis trencher backhoe
I wish these machines could speak. I'd sit for hours listening to the stories this backhoe could tell. One day I'll show you all the welded patches it has. But here, for now look at this cylinder fittings. Clearly it's been outside for years.
You think that's bad? I thought so too, until I saw this one.
No wrench or pipe wrench could bite into what was left of that fitting. Some heat and chisel action got it moving.
Soon the other one's out too.
Why would there be a spring in there?
You think that's bad? I thought so too, until I saw this one.
No wrench or pipe wrench could bite into what was left of that fitting. Some heat and chisel action got it moving.
Soon the other one's out too.
Why would there be a spring in there?
Case 224, 444, 644, 680E
Kubota B26
Kubota B26
- Spike188
- Posts: 1073
- Joined: Sat Mar 06, 2021 12:58 pm
- Location: Ayr Ontario
- Has thanked: 5825 times
- Been thanked: 4138 times
Re: Case/Davis trencher backhoe
@Eugen the piping that runs the far end of the cylinder is a slip fit. The spring keeps the piping seated at the other end of the cylinder. There will be O-rings on both ends of the pipe.
Spike Colt - 9 & 10, Case - 108, 118, 444, 446, 448, 646, 646bh, Ingersoll 4016, 4118AH
- Toolslinger
- Posts: 298
- Joined: Wed Mar 03, 2021 12:03 pm
- Location: NJ/PA
- Has thanked: 23 times
- Been thanked: 1435 times
Re: Case/Davis trencher backhoe
Yep, the spring is right. It needs room to expand and contract a little with the change in temps.
- Spike188
- Posts: 1073
- Joined: Sat Mar 06, 2021 12:58 pm
- Location: Ayr Ontario
- Has thanked: 5825 times
- Been thanked: 4138 times
Re: Case/Davis trencher backhoe
https://manuals.ccigt.com/ServiceManual ... -50741.pdf
Page 19 item #1 is the spring in question. Notice that tubing has and O-ring on each end. The tube is removed by drawing it through the threaded port.
Spike Colt - 9 & 10, Case - 108, 118, 444, 446, 448, 646, 646bh, Ingersoll 4016, 4118AH
- Eugen
- Posts: 5166
- Joined: Wed Mar 03, 2021 2:52 pm
- Location: Port Mcnicoll, Ontario
- Has thanked: 12091 times
- Been thanked: 16346 times
- Contact:
Re: Case/Davis trencher backhoe
Awesome! Thank you @Spike188 ! I'll put new o-rings them. Had no idea the tube was serviceable!
Case 224, 444, 644, 680E
Kubota B26
Kubota B26
- thebuildist
- Posts: 818
- Joined: Mon Jul 26, 2021 5:09 pm
- Location: Atlanta, ga
- Has thanked: 839 times
- Been thanked: 3270 times
Re: Case/Davis trencher backhoe
You, sir, are a gentleman and a scholar!Eugen wrote: ↑Mon Apr 03, 2023 4:20 pmHere you go. The thread on the inside of the sleeve is left handed, and is not 60 degrees even, it is oriented like pike teeth to bite into the hose so it does not pull out easy. The depth of that thread seems to be 0.05.thebuildist wrote: ↑Mon Apr 03, 2023 3:31 pm Any chance you can measure those thread pitches for me? I might need to manufacture a couple of those wiz-bang things.
Bob
99F05F5F-0918-42C1-AD13-8BB9A01DAEE9.jpeg
Btw that's called a "buttress" thread.
Bob
Here's a mold of the inner biting thread using play dough.
CD4BC2B5-5C48-41E1-B0CE-CEC48DC1458D.jpeg
"Never be afraid to try something new. How hard can it be?"
- Eugen
- Posts: 5166
- Joined: Wed Mar 03, 2021 2:52 pm
- Location: Port Mcnicoll, Ontario
- Has thanked: 12091 times
- Been thanked: 16346 times
- Contact:
Re: Case/Davis trencher backhoe
Got two 44" pieces of new hose and put one of the fittings on for test. Didn't go easy, had to use quite some strength to screw it on. This is promising.
Case 224, 444, 644, 680E
Kubota B26
Kubota B26
- RoamingGnome
- Posts: 639
- Joined: Sun Jan 08, 2023 12:54 am
- Location: Hamilton, ON
- Has thanked: 9051 times
- Been thanked: 3261 times
Re: Case/Davis trencher backhoe
Congrats on getting the re-usable fittings to work @Eugen Looks Great! - It was my experience that leaving a tiny gap (1mm - 1/16") between the end of the hose and the inside of the fitting where it bottoms out gives the hose a little room to expand when the insert is being screwed in and some lube on the inner fitting can help too...
'68 Case 195, '84 Case 446, '88 Ingersoll 222 - and 1965 Case 530ck (fullsize backhoe)