Ed's 77 Terex 72-41

[56wrench]

A flexible ground cable would be easy to install between the front and rear frames and probably a good idea

 

[mountainguyed67]

A flexible ground cable would be easy to install between the front and rear frames and probably a good idea

I‘m thinking the same. First I’ll see if it already has one.

 

[mountainguyed67]

Also had to replace a hydraulic hose in the middle of last trip, that meant a drive down to the hot valley.

 

[mountainguyed67]

Getting close to having the log grapple working. Got a second hole in the top pins. It work hardened before getting through the second hole, had to finish it with a carbide burr. The new hole will put the grease hole where it needs to be.

 

[mountainguyed67]

 

[mountainguyed67]

Another hydraulic leak yesterday, a flange hose connection on the bucket pump. I didn’t have that size o-ring, but already went half way down to Fresno and got some. Now to fix it.

 

[mountainguyed67]

I also drilled through the bushings for the above pins. The collars had holes, but not the bushings. I could only drill from one side because of placement of collars, and the second side walked. Now I’m going to drill a little bigger diameter to make the bolt go through easy, I don’t want to drive it in with a hammer.

 

[Welder Dave]

It never fails. Just when you think you have everything fixed and all the leaks stopped another one pops up.

 

[kshansen]

It never fails. Just when you think you have everything fixed and all the leaks stopped another one pops up.

Yep fix too many leaks and it will cause pressure to build up in the system which will then find the weakest point to release that pressure!

 

[davejo]

I'm thinking of looking at one of these vintage loaders so this is an outstanding thread. Is there anything that you would consider a "do not buy at any price" issue I need to look for when inspecting?

I'm not sure what year or model but it looks very similar to yours except the windshields are slightly more Art Deco looking with a sort of raised eyebrow look to them

 

[DMiller]

I'm thinking of looking at one of these vintage loaders so this is an outstanding thread. Is there anything that you would consider a "do not buy at any price" issue I need to look for when inspecting?

I'm not sure what year or model but it looks very similar to yours except the windshields are slightly more Art Deco looking with a sort of raised eyebrow look to them

Allis, Fiat Allis. Parts stream is essentially Dry. Unlike many to use off the shelf generic pieces, AC/FA engineered to specific designs no longer made.

 

[Welder Dave]

Anything involved in a fire. There are too many things that could be deal breakers to remember them all. You have to look at machines on an individual basis.

 

[davejo]

The loader looks a lot like this one, having the same curvy windshield:

Terex loader 72-51

Terex 72-51 loader Hour meter shows 325 Detroit 471 Motor (right rear tire looses air)

www.mc-bid.com

 

[mountainguyed67]

Couldn’t pin the grapple because the loader arm bushings are too small, but was able to actuate the cylinders. I’ve got new bushings coming, and will open them up. That’s the last thing.

 

[mountainguyed67]

The loader looks a lot like this one, having the same curvy windshield:

Terex loader 72-51

Terex 72-51 loader Hour meter shows 325 Detroit 471 Motor (right rear tire looses air)

www.mc-bid.com

Windshield shape looks like the only difference.

 

[mountainguyed67]

Another hydraulic leak yesterday, a flange hose connection on the bucket pump. I didn’t have that size o-ring, but already went half way down to Fresno and got some. Now to fix it.

This leak came back twice now, each time after using the bucket to pop a rock out of the ground with breakout force. A friend thinks I need to dial back the regulator on the control valve.

 

[mountainguyed67]

Brought down the second tilt cylinder, the other was already done. It‘s obvious why it was leaking. It’s leaking on the inside of the seals, the other cylinder was leaking on the outside of the seals. The metal surface was too pitted and I had to replace it, this one looks the same.

 

[mountainguyed67]

Installing the seal stretched it out like last time, so I’ve got it compressed in to hold it there. Doing this overnight worked on the other cylinder, then it went together. The only thing I’m waiting on now is the bushing that goes inside the gland, I’m having a v machined into one end. Both old ones were already that way, the only available new one isn’t. The reason it’s needed is to get the right thickness to keep the bushing and seals from moving inside the gland, that would cause them to wear too fast. Once it’s back together I’ll go up and put the cylinder back on the loader, weather permitting.

 

[mountainguyed67]

Installing the seal stretched it out like last time, so I’ve got it compressed in to hold it there. Doing this overnight worked on the other cylinder, then it went together. The only thing I’m waiting on now is the bushing that goes inside the gland, I’m having a v machined into one end. Both old ones were already that way, the only available new one isn’t. The reason it’s needed is to get the right thickness to keep the bushing and seals from moving inside the gland, that would cause them to wear too fast. Once it’s back together I’ll go up and put the cylinder back on the loader, weather permitting.

View attachment 300668

I installed this cylinder a month and a half ago, it doesn’t leak. One lift cylinder developed a leak though, I was hoping I’d never have to mess with those heavy things.

 

[mountainguyed67]

I’m having trouble figuring out my parts book. Why is there no figure/drawing to show what the part numbers are? It only has a number pointing at a group of parts, it’s like it’s meant to be used with another book. To the right of the part descriptions there’s “Types” with numbers under it, what does that mean? The front of the book doesn’t have an explanation. I can confirm that 5.5001 is part number 5167709 by the bottom picture.