Groan...I didn't need this.

onefarmer · Jan 8, 2021

I was moving my trencher, attempting to cross a trench I just filled. As the rear axle went across and dropped in, there was a big snap and it quit moving. Here's what happened near as I can figure. One spider gear broke, a broken piece locked up the differential. Then all the power went on to the left axle snapping it too. Can't believe it since it's a Dana 70.

Now I get to rebuild the thing. Fortunately parts are readily available.

tomturkey · Jan 8, 2021

Nice looking outfit. Sure could put it to work around here with a few thousand feet of trench and tile. Don't have any knowledge about those drive units, I could hold the flashlight. I did for my Dad plenty of times. Of course I know now to shine the light where your working, not where I'm looking. lol lol gobble

Mark-Ia · Jan 8, 2021

I think George from Terra Haute could help.

Bob Bancroft · Jan 8, 2021

Interesting unit. I assume it's all wheel drive? And hydrostatic drive? The damage seems strange to me given that you weren't pulling hard, and again, I assume all wheels were pulling. It must be as you say- part failure, leading to other failures. Here's hoping you get the ring gear back in on the correct side!

onefarmer · Jan 8, 2021

I was thinking of him while tearing into it! Didn't he have Dana44? Same thing only not as big.

I did get the chance to figure the gears. 43:6 or 7.17:1 Slowest gear I could find for a 70

paul · Jan 8, 2021

That’s funny Tom, and I can relate to all.

Paul

onefarmer · Jan 8, 2021

It's been 40 years but I did take a Trans and Rearend class. Time to put the knowledge to use.

Bob Bancroft · Jan 8, 2021

I have an antique Clark forklift. It originally had two levers emanating from the transmission. Someone removed the hi/lo lever, as lo is plenty fast enough. When the directional lever is forward the machine goes backward, and vice versa. I assume someone installed the diff carrier/ring gear wrong side to- ! In my younger days, I though about tearing it all apart to fix it, and to run a new grease hose in to the throw out bearing while in there. But it didn't happen.

moresmoke · Jan 8, 2021

Cat gear drive dozers the forward/reverse shifter is opposite of travel direction.

used red MN · Jan 8, 2021

Was the side that broke the axle in the trench? How many horsepower is that machine? I would think you would really have to give it the beans to break that axle. Does it look like the axle is a new fresh break? My theory is that the axle has been broke longer and somehow the broken spider gears allowed it to drive off the other axle. Just my arm chair theory.

onefarmer · Jan 8, 2021

Definitely a new break. Strange it didn't break while it was really pulling during digging. I was just transporting it back to the main for another run. I had to cross a trench to get there and that's when it broke. There was no doubt I heard it break. With a slow gears it must put some serious stress on the axle shafts.

onefarmer · Jan 8, 2021

This thing has a Ford 192D engine, somewhere around 60hp, 4speed trans like a Ford f250, The trans drives the digging chain.

On the trans via the pto port it drives the hydrostat pump.

The travel motion is done via a transfer case. It's driven by a hydraulic motor that the hydrostat pump powers. Top travel speed is like 5mph. digging speed can be measured in inches per minute or feet per hour

The transfer case has a high and low. Full time four wheel drive.

All the tires are loaded.

It did have a backhoe on the front which I removed so I could mount a hydraulic winch. All the cylinders would have needed replaced anyway.

I added several JD suitcase weights to the front but need alot more.

onefarmer · Jan 8, 2021

I wore out the digging teeth that came on it. Replaced them and about wore out the new set now. I must have 20,000ft thru it now. I've done two small fields 7-8 acres each and several spot tiles so far. Almost paid for itself now. If I can keep it going it'll be doing far more.

paul · Jan 8, 2021

How do you control depth, or are you working on a slope all the time? I have potholes, so constantly would be running deeper and shallower as I would go.

How deep can it go?

Paul

shinnery · Jan 9, 2021

I have an Air Force surplus shortened wheelbase diesel Dodge that was used to move stuff around on the flightline and it has a 7.17 rear end in it. Might be a Dana also?? Auto tranny with the OD disabled. About a 97 model I think. I got it because of the 12V Cummins with a P-Pump.

onefarmer · Jan 9, 2021

I put up targets and run a string. If this video works you can see it. The rod is on the boot so it's quite accurate.

<iframe width="1349" height="480" src="https://www.youtube.com/embed/tt6CCFEp5EA" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

onefarmer · Jan 9, 2021

George contacted me, so he still is lurking

onefarmer · Jan 9, 2021

Groan...I didn't need this.

onefarmer

Well-known Member

tomturkey

Well-known Member

Mark-Ia

Well-known Member

Bob Bancroft

Well-known Member

onefarmer

Well-known Member

paul

Well-known Member

onefarmer

Well-known Member

Bob Bancroft

Well-known Member

moresmoke

Well-known Member

used red MN

Well-known Member

onefarmer

Well-known Member

onefarmer

Well-known Member

onefarmer

Well-known Member

paul

Well-known Member

shinnery

Well-known Member

onefarmer

Well-known Member

onefarmer

Well-known Member

onefarmer

Well-known Member

Similar threads