Backhoe Feet

[3RRL]

The general idea is to have enough tube inside the DOPCV on each end so it fits in between the 90° elbows. So when I screw in the NPT thread, there is still tube inside the collar where the compression ring can seal off.

Here are the cylinders, one with the unfinished tube (bottom) and one with the finished tube (top).



So this is the basic idea to hard plumb the CPOCV onto the cylinders.



I am still waiting for the fittings I ordered from Discount hydraulics. These 90° elbows are just to show you the basic idea.

 

[3RRL]

Guess what?
I dropped one of those tiny metric compression rings and can't find it now. What a bummer. I'll have to make one of those too! Just what I needed.

 

[tommu56]

Rob
Get down on your belly and look across the floor
its amazing if you look across how tall those missing parts look
looking down they just disapear.

tom

 

[JerryG]

Guess what?
I dropped one of those tiny metric compression rings and can't find it now. What a bummer. I'll have to make one of those too! Just what I needed.

I have gotten to where I take a magnet with me when I work on anything small. One of those that telescopes. I don't know if it would work on those compression rings or not.

 

[schmism]

so i got really lost.....

in a perfect world what would all the fittings/threads be?

Flare?
SAE? (sholder/o-ring)
NPT?
compression?
bango?


i suppose the easyest for your situation would have been to get some 12mm tubeing from CCM when you ordered your check valves, and then just brazed that tubeing on to the 13mm bajo fittings you cut off your existing rubber hoses.

 

[john_bud]

John,
Lengthening the stabilizer legs themselves would have increased the distance between the hydraulic cylinder pivots. I'm planning on using the same cylinders. But you are right about gaining more width that way. Plus I got everything cut and milled already.

Actually, it looks easy to have made an extension out the end of the tube. Leave the cylinder where it is and make a new support for the foot. Then again, I'm in my cosy den and everything "looks" easy from here!



Your lock project seems to have run into some non-standard fitting snags! Dealing with that would drive me batty! Then again, I'm pretty good at bumping the stabilizer cylinders every 1/2 hour or so.

jb

 

[dullpain]

Pimp my Tractor - now that's rich. I enjoy RRL's projects too, Go ahead and put those gussets in now on those feet, you'll thank me later.

By the way , the shoes look like Red Prada's to me. Have a girlfriend that has a pair just like em!!!

 

[hill]

By the way , the shoes look like Red Prada's to me. Have a girlfriend that has a pair just like em!!!

Was it the color or the proportions that reminded you of her?

 

[3RRL]

Hahaha, you guys kill me. I guess that's why I keep posting for the free abuse.

Hey,
I found that compression bushing while sweeping up, under my lathe! Now I am jazzed. I was able to put the hard plumbing for the double pilot operated check valve addition together finally. I must say it came out excellent! Even if I say so myself.



I measured the distance between the elbows on each cylinder (they were different by .100") so I could cut the 303SS tubes to length. They need to slip between the elbows while set deeply into the DPOCV's. Then I bought some pipe seal hex nuts and put them over the NPT threads of the SS tube. I did this as a safety measure so I can get a positive seal, but mostly because I did not want to screw them into the elbows too far. Otherwise the compression end might come out of the DPOCV. I measured how much I could slip them out and still have enough to make a good compression seal. Then screwed them into the elbows while measuring to maintain that safety margin. Fortunately, there was enough travel to screw them in almost completely tight anyway. Then tightened up the elbow ends with the seal nuts.

Last, I had to center the DPOCV on each cylinder so that the compression ends were of equal engagement and tightened that end up. Now the hard lines with DPOCV are complete. Aren't they beautiful now? I think it is a super clean bridge.

 

[3RRL]

Now I can take them up to the property to install. But before hooking the hydraulics up, I am still waiting for a fitting from Discount Hydraulics. That is the reducer sleeve which goes into the 3/8 port of the DPOCV's. I bought 2 kinds. 3/8 NPT male to 1/4 BSS (British parallel pipe), and also 3/8 BSP male (taper) to 1/4 BSS (straight).



Obviously, I found out that the banjo bolt is British 1/4 parallel pipe thread, but I'm not sure what the 3/8 pipe is on the DPOCV's other than I know it is tapered. Both British 1/4 and 3/8 pipe have 19 threads per inch and American has 18 tpi. When I get them, I will install them at camp and reconnect the hydraulics, along with the feet and try her out again.

I will tell you what difference the DPOCV's make on the stabilizers after trying them out. I'm hoping they will work a lot better than the fast bleed down I had before. In other words, I'm hoping the bleed down is because of the valve and not through the cylinders themselves. This modification will tell me for sure.