Doubt I can get this old Cletrac running...

[mopardude318]

Nice photos and work. Thx for posting.

Could you tell how the pump had failed, requiring rebuild?

Yes I sure can! I’m pretty sure the pump was just fine. I was replacing a fitting on the pump inlet. Being from 1947, that fitting was froze solid on there. I got out my trusty cordless angle grinder and didn’t think where all those metal shavings where going to end up! Yep, right inside that hydraulic pump! I didnt want to risk trying to flush it out over and over by hand and hoping for the best. So I took it apart and sure nuff it was full of metal shavings. Lol. So I replaced the bearings while I was in there. They were worn and needed replacement. Some of the rollers fell out of the bearing shell as I removed the gears.

Hope it works now. Lol

 

[dfkrug]

I got out my trusty cordless angle grinder....

Gotta get me one of them. All 7 of mine have cords.

As for the pump, it looks constructed more like a lube oil pump than a hyd pump. Modern ones use some fancy E-shaped side seals, made out of exotic plastics.

What do you suppose is the working (relief) pressure you are working with? Is each pump chamber for separate wheel motors?

 

[shaeff]

Very cool. That pump looks like a very large version of the power steering pump on my MF35 Utility. No bearings in mine, just bronze bushings.

 

[mopardude318]

Well I got some more work done this weekend. After I got the engine to run by itself, I wanted to see if the tractor would move...So I pushed in the clutch, placed it in gear and eased off the clutch...the drive sprockets nudged a little bit, the tracks tightened as if it was gonna start to roll forward, then all of a sudden, as I apply full torque and release the clutch all the way out, I hear a banging/grinding noise, and the tractor ceases to move!!!

So I just may have found the problem why this thing was parked...Busted trans, or drive gear, or something. I don't know. So I get out a book and start reading, and start pulling inspection covers. LOL I have found that the inner and outer main drive shaft bearings have disintegrated and all that remains is the bearing race. LOL. The drive shaft gear was now flopping unsupported in the housing making it skip over the bull gear. If that makes sense. LOL Here's some pics.

Here are the covers I start to remove, the shifter and PTO lever just come straight out. easy.

Kind of a mess in there but I can work with that. lol

I didn't find anything unusual in there so it was suggested to me to pull the final drive covers behind the sprockets...

One side looked good, had bearings.

The other side was the problem side! No bearings, just the race! LOL

This was the unsupported gear that was skipping on the bull gear, if you will...

I had to get my Kubota, and pull the Cletrac forward so a hole in the sprocket lines up with those inspection covers, allowing me to remove the shaft and gear!

Comes out right through this hole.

Not much to see here.

These guys look good.

So the inner and outer bearings were 50 bucks a piece, should be here by Friday. I don't know what I have to do yet to install the new bearings...break track and pull the sprocket, then take apart the bull gear/final drive housing...press the bearings in...I don't know yet. I got some work ahead of me boys. More to come. LOL

 

[MossRoad]

Thanks for the pictures. Your work is admirable. :thumbsup:

 

[Shaneard]

Any idea where the missing bearing is? Awesome project!

 

[fried1765]

Nostalgia for my old OC 46 3G....but only a little bit!

 

[mopardude318]

Well I sure had a busy Saturday. I found the master link in the track and pulled the tractor till it was in the sprocket. Used a torch got the little pin out.

Then started beating on this dang pin, man it wouldn't budge.

I had to borrow my brother in laws Oxy/Acetylene torch to get the chain links cherry red!

Then after pounding on that **** pin for...oh I don't know, 200 strikes with a 12 pound sledge, I finally got it.

My hand slipped and I smashed the **** out of my finger.

The sprocket nut is 3 dang inches big, it was pretty tight.

But not as tight as the sprocket on the shaft. Oh my that was a tough one. I made a puller out of 3/4 grade 8 all thread, some 1" thick plate that I burned 2 holes through, and a bottle jack.

Some more heat and beating on it, also maxed out my 10 ton jack, finally came off.

I had some timbers I had layin around I cut to fit. lol Jacked it up with 2 jacks.

With the sprocket out of the way, I was able to take off the first half of the final drive cover, which also took some beatin.

I have a lot of cleanin to do! There parts of the bearing races and ball bearings everywhere. What a mess.

I have to pull this cotter pin, take the nut off and pull and replace the inner and outer bearing on this too because the sprocket was wobbling like a bad wheel bearing.

Started at 10 this morning, finished at 11pm. I'm beat. good night.

 

[aczlan]

But not as tight as the sprocket on the shaft. Oh my that was a tough one. I made a puller out of 3/4 grade 8 all thread, some 1" thick plate that I burned 2 holes through, and a bottle jack.

Just a note, sometimes those jacks will run out of fluid if you use them sideways. If you flip it over so that the pump is on the bottom, they will still work when sideways...

Aaron Z

 

[pmsmechanic]

Just a quick tip about that hammer pictured. Take a piece of pipe that's comfortable to grip and weld to onto the rebar handle. I used to have a similar hammer and it was always twisting out of my grip and helping me flatten my fingers. I welded a larger piece of pipe on and it's a whole different hammer. A lot easier to use and you can hit hard and accurately with it now.

I like the way you are documenting this project with pictures. It lets us all enjoy it. Thanks

Edited to add: I don't know how much you are going to use the crawler but I noticed that the sprockets have a bit of wear on them. You could put the wear on the other side of the teeth by switching the sprockets side for side. It's a lot of work I know but you are already half ways there. Just an idea.