Check pins & bushings

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   could one of you please explain the proper way to check pins & bushings for wear on a small crawler? Randy

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Randy WI Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 22 Jan 2014 Location: Ogema, WI Points: 790	Post Options Post Reply Quote Randy WI Report Post Thanks(0) Quote Reply Topic: Check pins & bushings Posted: 18 Oct 2020 at 12:31pm
	could one of you please explain the proper way to check pins & bushings for wear on a small crawler? Randy

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Jim.ME Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 19 Nov 2016 Location: Maine Points: 952	Post Options Post Reply Quote Jim.ME Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 1:04pm
	Here is a good informative article, by Dresser, about undercarriage. The info, especially about how to measure and check wear applies to just about all crawlers I know of. You will need the specs for the crawler and chains you are going to measure for comparison to the measurements you get. http://tractorparts.com/PDFs/undrcarguide.pdf

DMiller Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 14 Sep 2009 Location: Hermann, Mo Points: 31200	Post Options Post Reply Quote DMiller Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 1:06pm
	snug up tracks, pick ANY pin and pick lead or tail surface(furthest forward or back point to lay of track), go to Fifth pin in either direction, measure to same point of that pin(Essentially Center of one to Center of the other), divide that number by four(Measured across Four Links). https://www.equipmentworld.com/ucinspection/# Edited by DMiller - 18 Oct 2020 at 1:08pm

Randy WI Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 22 Jan 2014 Location: Ogema, WI Points: 790	Post Options Post Reply Quote Randy WI Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 3:57pm
	Well i guess i don't know much about judging condition of tracks i was going by visible wear . thanks Randy

DMiller Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 14 Sep 2009 Location: Hermann, Mo Points: 31200	Post Options Post Reply Quote DMiller Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 4:13pm
	External wear on a bushing means a lot as they DO wear, it is the Pin to Bushing INTERNAL wear that eats them alive on dry pin rails. SALT or Sealed And Lubricated Track has Lube Seals and oil or heavy oily grease Pin to Bushing, Seals go bad oil/grease leaks out and they wear as Dry pin Rails do. These were the Old rails under my 7G, They APPEAR Great, they are also at 7.136" pin to pin, or .016 GREATER than 100% worn, Internally. Were snaking JUNK, walked off like a bad rubber recap. This is Snaking from Internal Wear.

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 81421	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 4:28pm
	Visible wear is also important Randy... But like DAVE said, its the INTERNAL wear that normally causes the chain to STRETCH, which then causes the miss fit on the sprockets... and leads to external wear.
	Like them all, but love the "B"s.

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 81421	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 4:30pm
	on a smaller scale think of your Chain Saw... Chain can LOOK ok on the outside.. Internal wear causes it to STRETCH until you have no adjustment left, or binding on the sprocket since the PITCH is way off.
	Like them all, but love the "B"s.

Randy WI Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 22 Jan 2014 Location: Ogema, WI Points: 790	Post Options Post Reply Quote Randy WI Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 5:53pm
	The sprockets on this cat look like they are good . i have owned 3 smaller john deere dozers 420s and 430 on the smaller tracks i would just try to twist the pad back and forth if it didn't twist much it was good to go. 450 tracks are getting too big for an old man to twist on. starting to think I should run away for this one. The dealer said the tracks are at 90%. They look new. Thanks for the reply Randy

Ray54 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 22 Nov 2009 Location: Paso Robles, Ca Points: 4561	Post Options Post Reply Quote Ray54 Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 5:54pm
	The same concept as roller chain on any farm equipment. When worn out you do not measure chain, you count the number of links. If you lay a new and very used chain side by side of the same number of links. the old will be much longer. Worn or stretcher as it is referred to wares sprockets faster than new chain the same in tracks. DMillers last picture with chain under track frame also shows "snakyness" (don't know if that's a real word but very descriptive).Not something really measurable but becomes part of the track issues that lead to losing a track off sprockets and idlers. All because of internal ware. Generally only measured in how stretched a chain is.

Randy WI Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 22 Jan 2014 Location: Ogema, WI Points: 790	Post Options Post Reply Quote Randy WI Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 6:37pm
	I had a real good lesson in worn pins and bushings on the last 420 when my oldest son threw a track on top of an ant hill. ya that was fun, that was 35 years ago. now with bad wrists I don't know how it would go to be putting tracks back on. Randy

Ian Beale Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 03 Oct 2011 Location: New South Wales Points: 973	Post Options Post Reply Quote Ian Beale Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 6:37pm
	Test for the timing chain on an Alfa Romeo is to open it out, hold it links up, measure the deflection and compare to book spec

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41616	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 19 Oct 2020 at 1:41pm
	Track wear has 2 things - internal and external - external is the shape of the roller or bushing - how it fits into sprocket teeth , and sprocket teeth themselves being pointed , flat cupped , bushing has 2 wear sides externally and can be turned ONCE to bring a new surface into contact with sprockets Internal wear is not easy to spot but the measuring of spacing between 3 to 5 overall links will give a idea of wear limit . Internal wear can be compensated with by having a track press remove pins and bushings and rotating 180 degrees to bring new surface into play on wear . this will allow about 1/4 more life that was the new track life . If left to long before turning the ends of the links will have wear and a snaky track will result even though new wear surfaces are inside . The idea of removing a link form track so you have adjustment is a real FALSE repair as the pitch of the roller to sprocket is off and bushing will be riding up on sprocket and decreasing sprocket life itself One of the biggest and quickest deaths of track is HIGH SPEED use and in that almost double with high speed reversing over a prolonged distance .
	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."

Ages Cat Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Hutchinson, MN Points: 688	Post Options Post Reply Quote Ages Cat Report Post Thanks(0) Quote Reply Posted: 20 Oct 2020 at 11:40am
	I have a set of K tracks. The pads are 60% or better. These have the same dimensions as an HD6. 2" pin diameter, with 4 1/2 inch rail height. Pad bolt pattern is the same dimension as the HD6. They are 34 links. I also have a pallet of HD6 pads, about 60, which are 16", I believe. I can email or text pictures of the tracks.
	Curt Anderson HD3, HD5B, HD6AG,HD6B dozer, I-400,615, 616,620,720,ACP25 lift truck, 1956 D Grader, AC 540 loader, AC #84 plow, Simplicity tractors, Agco MT225, Agco 2025,

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41616	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 21 Oct 2020 at 2:50pm
	HD 5 / HD 6 uses the same track dimensions just the length differs in number of links used between models Didn't know early machines also used the same pitch
	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."