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Help Or Educate

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Bill D

04-13-2001 14:09:41




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A new and green crawler owner What is a track press and do you need one to R&R a track master pin on on a McDeering T20 is that a main strength and big hammer exersise?




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Joseph Turrisi

04-14-2001 06:21:00




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 Re: Help Or Educate in reply to Bill D, 04-13-2001 14:09:41  
You do not need a track press as a 10 to 16 pound slegdhammer works just fine and will help you get in shape. I have replaced and rebuilt many tracks on many different machines and have never even seen a track press. Also it is a good idea to have some friends to help you as this stuff can be very heavy and awkward.



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Big Mike

04-13-2001 18:52:32




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 Re: Help Or Educate in reply to Bill D, 04-13-2001 14:09:41  
OOPS no link,one more try its acmoc.org



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DY

04-13-2001 18:00:01




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 Re: Help Or Educate in reply to Bill D, 04-13-2001 14:09:41  
Bigger hammer and when you are resting from swinging the hammer, heat with a torch.
About a half dozen cycles back and forth, you should have it.



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jerry Gerthofer

04-13-2001 17:04:30




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 Re: Help Or Educate in reply to Bill D, 04-13-2001 14:09:41  
you should be able to get the master pin out with a mall and punch. rest of the track you will need a 25 ton to 50 ton pres



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Big Mike

04-13-2001 18:45:58




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 Re: Re: Help Or Educate in reply to jerry Gerthofer, 04-13-2001 17:04:30  
The bushings on a track chain only wear on one side so when new set is worn but not wore completly through its common to press each individual pin and bushing apart rotate them 180 degrees and press the pin back in. A track press is used for this.The track pin press is basicaly a pota-power type unit with special made tooling very expensive tool. The preferred method of removing a master pin is to rotate pin to the ten o clock position on the drive sprocket.Pound on the pin,if heat is to be used you don't want to get it too hot as it will swell the pin at same rate as bush. Removing one or two pads make it easier to get to the pin.Use new pad bolts for what they cost its not worth messing with old ones.If the pin comes right out and appears to be real sloppy its a common pratice to weld them on both sides during reassembly.Concentrate the weld on the pin not the link this makes the task of removing them later easier To remove a welded pin grind the pin down with small grinding wheel till it appears to be round and drive it out. I mark the location of the welded pin by welding a small M on the pad,so I know where it is next time.The link I posted is for the Antique Caterpillar Macinnery Owners Club. Lots of good discussion there

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Roy

04-15-2001 11:43:32




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 Re: Re: Re: Help Or Educate in reply to Big Mike, 04-13-2001 18:45:58  
If you choose to remove pads to gain better access to the master pin, make sure you don't remove the pad that is on the master link. If you do it will spread the link halves and bind the pin in the far half or twist it off the bushing. The pad holds the links straight so the pin will come out.



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