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Author Topic: I haven't seen this before  (Read 3040 times)

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Offline barbender

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I haven't seen this before
« on: December 09, 2017, 10:56:53 PM »
There's a country song with a line about a woman "inventing new ways to be cruel", I think of it sometimes when I watch people bust up equipment. The other day one of the truckers called me, said he'd need a push up a hill as his "transmission came right off the motor"!😲 So, I drove out, and found


That is the shift tower on the bottom of the tranny, it spun the whole tranny 180!! Sheared the bell housing bolts right off. He met another truck on a hill, he tried to start back up loaded, personally I think he rolled backwards first, but I wasn't there. Let the clutch out and BAM! I was visiting with a guy that used to work out west, and he was the only person I talked to that had seen this before. He said a guy out there powered out on a hill and stalled the engine. It started rolling backwards and did the same thing, but unfortunately the shift lever didn't break off and broke the guy's leg!
Too many irons in the fire

Offline Maine logger88

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Re: I haven't seen this before
« Reply #1 on: December 09, 2017, 11:07:33 PM »
Wow how is that possible lol! Was it missing a bunch of flywheel housing bolts or break the flywheel housing?
79 TJ 225 81 JD 540B Husky and Jonsered saws

Offline barbender

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Re: I haven't seen this before
« Reply #2 on: December 09, 2017, 11:44:35 PM »
Well, the owner came out and looked it over, he said from what he could see it sheared all of the flywheel bolts off. We'll know better when the repair is done, but it looked like it just destroy led the bell housing, and the pto housing, and didn't damage the block or trabsmission.
Too many irons in the fire

Offline newoodguy78

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Re: I haven't seen this before
« Reply #3 on: December 10, 2017, 02:12:52 AM »
That right there is impressive. I didn't even think that was possible,glad I'm not footing the bill on that one  :D

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Re: I haven't seen this before
« Reply #4 on: December 10, 2017, 02:31:10 AM »
Normally the input shaft should twist before breaking the bolts off. What transmission was it? Engine?

Offline barbender

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Re: I haven't seen this before
« Reply #5 on: December 10, 2017, 03:21:36 AM »
There's lots of stuff I would expect to let go before this happens. I don't know what tranny this is, C12 Cat engine.
Too many irons in the fire

Offline sawguy21

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Re: I haven't seen this before
« Reply #6 on: December 10, 2017, 04:45:36 AM »
Wow!!! I agree with you, he was likely rolling back and dumped the clutch. Expensive mistake.
old age and treachery will always overcome youth and enthusiasm

Offline Logger RK

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Re: I haven't seen this before
« Reply #7 on: December 10, 2017, 05:47:58 AM »
One of my pulp buyers drivers left the lockers in with a 98,000# load trying to turn off a dirt road to blacktop. Wouldn't turn,so put it in granny gear. Rear end went all over the black top. Also around the same time the owner lost a set a tire's & hub with a load on. His mechanic forgot to put the axle nut lock on. And of coarse road postings were only a few days away. Glad I stay in the woods & not the road.

Offline bushmechanic

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Re: I haven't seen this before
« Reply #8 on: December 10, 2017, 06:45:51 AM »
Wow that's a bad job and costly for someone! Was it an aluminium bell housing? We get a lot around here that corrode wicked and have to be replaced, but this is usually caught upon the annual inspection.

Offline mike_belben

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Re: I haven't seen this before
« Reply #9 on: December 10, 2017, 08:36:11 AM »
Im betting the bellhousing bolts were backing off and/or some of the dowels may have been missing or fallen out.  If the guide dowel holes arent torn clear out its because they werent there.  The input shoulda snapped first.    All the sae2 bell adapters ive ever seen were aluminum.  Its a fuller trans.  Hes lucky it didnt turn that battery cable into a stick welder and burn the rig down. 

Or maybe unlucky, depending on insurance coverage.
Psalm 37:16

Offline 4x4American

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Re: I haven't seen this before
« Reply #10 on: December 10, 2017, 08:49:27 AM »
And here I thought this was impressive that my buddy sent me from the shop he works at:





Thats the biggest input shaft they make (2 i believe) for on road tractors i think its rated for 2000ft lbs driver broke that last week.  Same thing, load of fuel on back rolled backwards let the clutch out.  But it didnt break instantly that fractured something then he commenced to hot rodding it and it broke shortly after.  the truck (t800) has a 600hp/2100ft-lbs tune. 
Boy, back in my day..

Offline Roxie

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Re: I haven't seen this before
« Reply #11 on: December 10, 2017, 08:53:10 AM »
There's a country song with a line about a woman "inventing new ways to be cruel", I think of it sometimes when I watch people bust up equipment.

One of my favorite's Dwight Yocum's song, Guitars, Cadillacs, Hillbilly Music

"But thank you girl for teaching me
brand new ways to be cruel
and if I can find my mind now, I guess I'll just leave." 
Say when

Offline mike_belben

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Re: I haven't seen this before
« Reply #12 on: December 10, 2017, 09:03:45 AM »
Input shaft break is a blessing.  You pull the shift cover, inspect gearsets to be sure all is well.. Then just unbolt bearing retainer and slide in another input.  If you broke stuff in the main box its a full teardown.


Maybe 10yr ago on a wheeling trip my buddy exploded the entire trans case out of his rockcrawler.  Shafts, gearsets, roller bearings, tcase and driveshafts just went whump onto the ground. 
Psalm 37:16

Offline Jeff

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Re: I haven't seen this before
« Reply #13 on: December 10, 2017, 09:10:20 AM »
Wicked!
Just call me the midget doctor.
Forestry Forum Founder and Chief Cook and Bottle Washer.

Commercial circle sawmill sawyer in a past life.
Ezekiel 22:30

Online Gearbox

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Re: I haven't seen this before
« Reply #14 on: December 10, 2017, 10:02:28 AM »
I broke a 5 and 4 years ago on a hill . Tried to go from 3rd to first as I was powering out . As I was moving the shifter I was thinking you are going to break something . Yep 7041 Spicers aren't cheap .
A bunch of chainsaws a BT6870 processer , TC 5 International track skidder and not near enough time

Offline Maine logger88

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Re: I haven't seen this before
« Reply #15 on: December 10, 2017, 01:34:48 PM »
I cant imagine how much force it would take to shear off 12 7/16 bolts!
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Offline barbender

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Re: I haven't seen this before
« Reply #16 on: December 10, 2017, 01:57:37 PM »
Thanks Roxie, I knew it was Dwight Yocum, but I couldn't remember how to spell his last name😊 This happened on a pretty steep hill, and this tractor was pulling a triple axle trailer, so probably 92K gross. I think the bell housing was aluminum,  might have been cast iron. There were chunks of it all over for sure!
Too many irons in the fire

Offline Resonator

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Re: I haven't seen this before
« Reply #17 on: December 10, 2017, 02:04:32 PM »
At least he didn't break down "A Thousand Miles From Nowhere." (another of Dwight's songs.)   :)
I had an old International semi eat a u-joint pulling a loaded belly dump full of gravel a couple years ago, on a steep hill. Carefully rolled backwards downhill, (running over the drive shaft on the way back down), and parked on level ground to get towed. Unhitched from the loaded trailer, (Boss's idea, not mine), and got towed back with a 1 ton pickup and a chain. Oh the fun of truck driving...    :)
Under bark there's boards and beams, somewhere in between.
Cuttin' while its green, through a steady sawdust stream.
I'm chasing the sawdust dream.

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Offline mike_belben

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Re: I haven't seen this before
« Reply #18 on: December 10, 2017, 03:16:14 PM »
I spent thanksgiving last year in a port jervis parking lot, waiting for a headgasket.  It. Was. COLD.

Next day was a fun few mile walk to napa and back with a pail of oil and a pail of coolant.  Then another trip for filters and drain pan.  3 days to get rolling.  I will never hammer up a hill again for as long as i live.


Psalm 37:16

Offline Grizzly

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Re: I haven't seen this before
« Reply #19 on: December 10, 2017, 03:46:37 PM »
I've had a variety of things go wrong for me and I've seen a variety of things happen to others but I ain't never seen that. Wouldn't have thought it possible without seeing it cause I would have expected something else to give first. But sometimes the stars align to create something good and sometimes a disaster.
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