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DMiller 
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 Topic: Curiosity
Posted: 26 Feb 2011 at 3:35pm |
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I have been looking at crawlers once again, if I can find one I can afford yet afford to work on, and I find this curiosity from time to time; the track pads on a few have a square hole where the drive sprocket rides into them as most do not is there a variable to track pads I am unaware of or are these just damaged from something being pressed through them or just wear letting the drive sprocket break them?
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MNLonnie
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Posted: 26 Feb 2011 at 4:12pm |
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The parts book for the M calls them cot-out shoes and I was told by someone that it allows ice and snow to leave the track rather than be compressed and cause stress.
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Waukesha B, B, IB, G, styled WF, D15, 615 backhoe, 2-Oliver OC3's, 4 Ford Model T's, 3 Model A Fords, AV8 Coupe, AV8 Roadster, 1933 Ford Wrecker
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chllngr528
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Posted: 26 Feb 2011 at 7:44pm |
Are you talking about a hole in the grouser pad or are you talking about having a square hole that on either side of where the sprocket rides in the shoe? If you are talking about the latter, lonnie is right and they are to allow dirt, snow etc out so it doesn't get jammed in there and break somthing.
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DMiller
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Posted: 26 Feb 2011 at 8:00pm |
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Holes in the grouser pads, I knew of the holes in the chains.
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DMiller
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Posted: 26 Feb 2011 at 8:29pm |
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On Machinery Trader there is a HD11 at Nash in Ct that has these holes, I see them from time to time but no rhyme nor reason nor particular make as the last Cat I looked at had them but was so far worn I could not tell if they were supposed to be there.
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chllngr528
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Posted: 26 Feb 2011 at 8:32pm |
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Hmmm probably are there for the same reason I would guess. Never seen it before on anything I ever worked on. But most of the stuff I work on with tracks are CATs, John Deeres, or komatsu. If can find a pic of it I would like to see it.
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chllngr528
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Posted: 26 Feb 2011 at 8:38pm |
wow you learn something new everyday. I just put a up a post about a hd11 and I replaced a grouser on it the last time I was there. It definatly did not have that square hole in it. Maybe that is something designed for snow and ice.
Edited by chllngr528 - 26 Feb 2011 at 8:38pm
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Coke-in-MN
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Posted: 26 Feb 2011 at 9:28pm |
Pads varry in the use and in soft ground where mud or soft material gets into tracks this allows the space between the bushing to be self clearing. When working in granular material or small aggregate then rock guards are added on lower part of mainframe to keep rock from becoming trapped in track. Grouser bars are also made in different styles for different material.
LGP machines with wide pads are great for soft material or working in wet swampy areas but if run on granular or hard material track will wear fast and pads will bend.
Older AC machines used a odd number of teeth on sprocket to on each revolution of sprocket to track a new surface was contacted on bushing.
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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chllngr528
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Posted: 26 Feb 2011 at 9:36pm |
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Coke I understand there are different style tracks for different applications but the question was what are the holes in the grouser pad designed for. I have never seen or worked on one that had those
Edited by chllngr528 - 26 Feb 2011 at 9:38pm
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MNLonnie
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Posted: 26 Feb 2011 at 9:47pm |
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chllngr, you lost me there or I don't understand the question. Like we said the holes are designed for the track to self clean. If I remember correctly all 4 of my Allis M's have the cut-out pads.
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Waukesha B, B, IB, G, styled WF, D15, 615 backhoe, 2-Oliver OC3's, 4 Ford Model T's, 3 Model A Fords, AV8 Coupe, AV8 Roadster, 1933 Ford Wrecker
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chllngr528
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Posted: 26 Feb 2011 at 10:12pm |
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Lonnie, I have never seen a track before that had a sqaure hole between the four bolts that hold the grouser pad on. I didn't understand what miller was talking about at first. Once I saw a pic of them I agree you are probably right and it was to help it clean. My question was what were they exactly designed for. Were they designed ecspecially for crawlers that were going to be used in snow and ice? The HD11 I mentioned didn't have the cut outs and know it has the factory grousers on it. So it has to be designed for a special purpose. By the way I can sometimes confuse myself.
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Ages Cat
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Posted: 26 Feb 2011 at 10:47pm |
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The HD-5 and HD-6 parts book show these pads as being snow and ice pads. With out the relief in the track pad plate, snow and ice would eventually build up in the track chain cavity until the track chain would walk off the sprocket . Cat shows similiar shoes available as well.
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DMiller
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Posted: 27 Feb 2011 at 4:00am |
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Ages cat, thanks, I considered that but the darn things showed up nationwide now I realize probably due to machine moves so that would be the answer, snow/ice pads.
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Kipn
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Posted: 27 Feb 2011 at 12:07pm |
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Snow, ice or mud relief holes.
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1961 H3
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Dave Everett
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Posted: 01 Mar 2011 at 12:17pm |
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Relieved pads to let the crap thru to stop the sprocket riding off the rails, on an M, if its the correct fitment, then the sprocket is a special on also with scalloped edges on the teeth and is also marked with an X after the casting number.
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