5J has larger front idlers then 3J?

smf52
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17 years 6 months ago #5231 by smf52

5J has larger front idlers then 3J? was created by smf52

So I pull the front idle wheels off my 3J parts machine in hopes of using them on my 5J. The 5J's are really tired. I come to find out the 5J idlers are much larger in diameter then the 3J. Any ideas why? Could I run the smaller idlers on the 5J?

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Jack
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17 years 6 months ago #5232 by Jack

Replied by Jack on topic 5J has larger front idlers then 3J?

I've been told that ag Cats were spec'd with smaller idlers to turn easier and roll up less soil in doing it. Bulldozer Cats had larger idlers for better stability. Im not sure if that was a general rule or an option some dealers exercised when they ordered the machines. I hope to hear more on this before we leave this thread.

Jack

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Old Magnet
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17 years 6 months ago #5233 by Old Magnet

Replied by Old Magnet on topic 5J has larger front idlers then 3J?

I believe it was the loader models that brought the options of larger front idlers, the five roller track frames, larger fuel tanks, double valve hydraulics, in the seat pony starting, transmission gear options and other developments that were captured for dozer usage as well.

As far as switching from large to small idler be aware that the addition or removal of a track link is required.

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Willie
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17 years 6 months ago #5236 by Willie

Replied by Willie on topic 5J has larger front idlers then 3J?

They came standard with smaller idlers part#1B306 using 30 links , but they had a larger 23 1/2 in. part# 6B8279 using 31 links on 4 roller and 35 links on 5 roller

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