Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Challenge question about tracks and track rollers?

Welcome Guest, Log in or Register
Author 
tractorsam

11-02-2006 07:44:20




Report to Moderator

Hi all, I normally spend most of my time around wheel tractors but I"m doing a course in Heavy Equipment Repair and we"ve just started talking about tracks. We were talking about track rollers, double and single flange. Our textbook says that most machines have an equal number of rollers and that they usually have a double flange roller behind the front idler and always have a single flange roller in front of the sprocket. Does anyone know why this is done? Also are there any machines out there that don"t adhere to this rule? (It seems to me that anything with five rollers wouldn"t comply on the equal number part at least) Any thoughts or insight would be much appreciated, thanks, tractorsam

[Log in to Reply]   [No Email]
NC Wayne

11-03-2006 17:41:48




Report to Moderator
 Re: Challenge question about tracks and track roll in reply to tractorsam, 11-02-2006 07:44:20  
We just got done doing the undercarriage on a D7F CAT and have the track frames "dressed out" and ready to go back on a D9G CAT. By the book both machines have a double flange roller at the front, behind the idler, and a single flange roller at the back in front of the sprocket. The purpose of the double flange rollers, both behind the idler and elsewhere, are to keep the track aligned while turning. The single flange rollers are also designed to keep it aligned but also to allow a degree of flexibility. That's why their used in front of the sprocket to allow the track to best align itself to prevent side loading and uneven wear of the sprocket teeth. In the case of a 5 roller machine, as long as both the single and double rollers are in their respective, places, the "extra" place can typically be taken up by either a single or double flange without any problems. If a machine is that short the space between the rollers is gonna small enough that your not worried about the sideways flexing of the track between them so a single flange will suffice but a double wouldn't hurt either. As far as any machines not following this basic guideline for the placement of a specific roller type first and last in line, I really wouldn't know. Each type of roller has it's design purpose but as I've seen many times over the years you never know what some engineer has in mind when he designes a machine, so the best bet is to put them back in whatever order they were designed to be in. One question back to you....does that course have a section on making the machine work for you. I'm talking about things like how to block a dozer under the rear so when you put the blade down it'll pick one track or the other high enough to allow it to move independentely of the other (with the steering clutch released/brake set on the stationary side of course) without the machine moving? How to wrap the track and use the sprocket and a block to assist in lining up the master pin (on older machines pr alligator link on the newer ones? Using the machines own weight and power to tighten a sprocket on the older machines? Basically is it teaching any of the tricks of the trade or is it just the basics? Either way there is alot to learn and it sounds like an interesting course. Good luck, and have fun putting the new knowledge to use. I do it every day and it's great to be able to really enjoy what you do and get paid for it too.

[Log in to Reply]  [No Email]
Bob Plumadore

11-02-2006 14:42:28




Report to Moderator
 Re: Challenge question about tracks and track roll in reply to tractorsam, 11-02-2006 07:44:20  
I am an old cat mech. most cats have a single at the front and rear, I never questioned why when I was learning the trade but later own was told that it gve the track a little room to line up after coming off the idler and I do know that most ofthe machine I worked on the sprocket would hit the center of a double flange roller usuall hte center or close to center roller was single flance, Hey single flange is five to fifty dollars cheaper

[Log in to Reply]  [No Email]
Lavoy

11-02-2006 13:26:07




Report to Moderator
 Re: Challenge question about tracks and track roll in reply to tractorsam, 11-02-2006 07:44:20  
A lot of the older smaller crawlers were single flange only. Newer and maybe more so larger machines had both, or maybe all double flange. As was stated above, sprocket may not allow enough room to use a double flange in the rear.
Lavoy



[Log in to Reply]  [No Email]
jdemaris

11-02-2006 13:13:30




Report to Moderator
 Re: Challenge question about tracks and track roll in reply to tractorsam, 11-02-2006 07:44:20  
I'm going to be the dumb guy here - since I'm not exactly sure what you mean by single or double-flange. For example - the Cletrac OC3s or HGs. They came with bottom rollers that had flanges on both sides and cradled the tracks. But the front idler wheel came in two versions. One was like the bottom rollers with flanges and it cradled the track and worked great. But - the other version only had only the center raised rib (no flange) - like most modern crawlers have. It was, and is often a problem and throws tracks. I was a Deere mechanic for a long time - and just about all the Deere crawlers have a front idler with one center rib and no flange. It was, and is intolerant to misalignment. Maybe the thinking is - better have a track come off so you get off your butt and adjust the alignment properly - before stuff wears out?

[Log in to Reply]  [No Email]
Bob/Ont

11-02-2006 09:13:41




Report to Moderator
 Re: Challenge question about tracks and track roll in reply to tractorsam, 11-02-2006 07:44:20  
Roller sequence varies from machine to machine. When doing undercarrage work mark the frames as to what rollers came off where. You can use double flange rollers any place they will fit and still turn, but best to follow manufacturers set up.
Later Bob



[Log in to Reply]  [No Email]
Larry Galvin

11-02-2006 07:56:02




Report to Moderator
 Re: Challenge question about tracks and track roll in reply to tractorsam, 11-02-2006 07:44:20  
I have a international TD-6 and just went through redoing the track rollers. The front and rear rollers are single flanged and the rear is so that it will clear the sprocket. I was told that the front could be a dual flange if it would clear the idler. The TD-6"s with loaders have a 5 roller frame, and there mmay be others.
lg
no neat sig line



[Log in to Reply]  [No Email]
135 Fan

11-02-2006 10:49:39




Report to Moderator
 Re: Challenge question about tracks and track roll in reply to Larry Galvin, 11-02-2006 07:56:02  
Most machines seem to have an odd number of rollers. I have a 931 cat that uses single and double flanged rollers. I had a 355 JD that used all the same kind. Single I think but not sure. The double help keep the track aligned better. Dave



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy