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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

500C Front Idler HELP!

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Author  [Modern View]

04-30-2014 05:04:06

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First off, Thank you to this Forum as I have solved numerous problems with my old equipment with advise found here.

Now for the new problem, I have a 1973 International 500C Crawler and am having a problem with the two bolts on either side that screw into the center pin of the front idler. The bushings are snug (but have a little play from wear) and the bolts have a captive piece of metal on them that prevents them from turning. This leads me to believe that the center pin that the idler rides on is turning and backing the bolts out and in as I go forward and reverse. I have tightened them numerous times but just with an 1 1/8" open end wrench and they seem to back out within 1/2 hour or so. Anybody know how tight these bolts are supposed to be or if there is a step I am missing?

Thank you!


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PD Mechanical

05-06-2014 05:14:00

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 Re: 500C Front Idler HELP! in reply to Hutch088, 04-30-2014 05:04:06  
Hutch088 your theory sounds right on. There are supposed to be two dowel pins one in each end of the shaft that pin into the side brackets to lock the shaft from turning. If the bolts were allowed to come loose at some point or it wasn't assembled right at some time they are probably sheared off. Steve.

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R Cadotte

05-18-2014 20:05:33

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 Re: 500C Front Idler HELP! in reply to PD Mechanical, 05-06-2014 05:14:00  
Hi Rocko59 here, work on IH crawlers a lot, PD knows me, I think . :-) I believe on this model they have a woodruff key 0n each end of the shaft to keep it from turning in the guide. I did a lot of work on a totalled one a few years ago. Get it fixed right as the parts are hard to find. The TD7s and *s have a big double wall roll pin, these have keys.

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