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Leon B MO 
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Joined: 12 Sep 2009
Location: Old Monroe, Mo
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 Topic: R62 8.3 fan pulley failure
Posted: 09 Oct 2024 at 9:09pm |
Been running this machine since 21, last fall the pulley on the water pump/ fan failed. Cut into the the front cover a bit. Put new parts on from 8.3 Cummings and finished last fall. Yesterday the new pully failed. Exploded, again. The radiator is clean, the machine runs in the low green in beans under load. We clean combine daily with air. What could be causing factory water pump/ fan pulley to fail. Thanks LeonB
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Uncle always said "Fill the back of the shovel and the front will take care of itself".
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im4racin
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Joined: 12 Jun 2017
Location: Garrison ND
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Posted: 10 Oct 2024 at 6:37am |
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Well 1st is the fan pulley, fan hub, or the water pump what failed. You have kinda talked in circles. The water pump doesn't have a replaceable pulley and doesn't carry the fan.
Edited by im4racin - 10 Oct 2024 at 6:38am
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ekjdm14
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Joined: 20 Aug 2024
Location: Manchester UK
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Posted: 10 Oct 2024 at 6:59am |
That confused me somewhat too. From the cutting into the cover comment I'd guess water pump bearing went out. As for a new one lasting under a year, assuming same mode of failure I'd suggest either belt tension way too high or major imbalance in the fan/hub assembly causing excessive vibration and killing the bearings.
But as mentioned, we need a little more specifics to really help further. What part failed last time (pulley that the belt rides on, fan/hub assembly that bolts on or the bearing in the water pump itself)? And is it the same failure this time round? Photos may also help if you're not 100% sure.
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im4racin
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Posted: 10 Oct 2024 at 7:27am |
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Were they new…from an 8.3 Cummins…? That sounds used to me
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
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Posted: 10 Oct 2024 at 9:54am |
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Local independent who cares for area Whites says the pulley eating the cover is common on that Cummins. Don't remember what failed to cause it.
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Leon B MO
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Posted: 10 Oct 2024 at 10:24am |
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I did misspeak, it does not have anything to do with the water pump just the fan and the pulley for the ac. Yes the part we put on last year was from a Cummins dealer as is the one we just put on this morning. The center of the pulley breaks out around the bolt hole circle and then plays hell with the front cover until the belt shreds. Sounds like I may be replacing this pulley annually as a precautionary measure.
I will try to do a better job of blowing out and around the front of the engine when I do the rest of it.
Thanks guys
Leon B
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Uncle always said "Fill the back of the shovel and the front will take care of itself".
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SteveM C/IL
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Location: Shelbyville IL
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Posted: 10 Oct 2024 at 2:52pm |
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It's like they need a reinforced stamping to add on like the ole Chevys did
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im4racin
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Posted: 10 Oct 2024 at 6:22pm |
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Some applications use a reinforcement ring on the pulley. If your Cummins distributor is like our local one…good luck! It will take a competent parts guy to find it! If I had a sn to use I would certainly offer it but no longer have the notes from when I worked there
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Leon B MO
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Posted: 10 Oct 2024 at 6:31pm |
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im4racin, thanks for the info. We will do some research on it and see if there is something available.
Leon B
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Uncle always said "Fill the back of the shovel and the front will take care of itself".
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im4racin
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Location: Garrison ND
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Posted: 10 Oct 2024 at 10:43pm |
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I think I have one of the reinforcement rings but can’t seem to find it. If I run across it I will let you know if there is a number on it
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Leon B MO
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Posted: 11 Oct 2024 at 8:20am |
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I do appreciate it
Leon B
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Uncle always said "Fill the back of the shovel and the front will take care of itself".
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AC7060IL
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Location: central IL
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Posted: 11 Oct 2024 at 9:18am |
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Leon B MO, Does AGCO offer any updates to this issue?
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Leon B MO
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Location: Old Monroe, Mo
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Posted: 11 Oct 2024 at 10:55am |
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So we did a little searching around this morning while waiting for the beans to dry out. We found that Case IH had the 8.3 in a 2388 combine and it had the same issues that I had. Case IH made a replacement pulley that is one mm
thicker than the original. Everything else should be the same, bolt pattern and diameter. So we called our nearest Case IH dealer and ordered one, we'll see what it looks like when we get it.
Leon B
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Uncle always said "Fill the back of the shovel and the front will take care of itself".
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SteveM C/IL
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Location: Shelbyville IL
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Posted: 13 Oct 2024 at 1:06pm |
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Save that number Leon.
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Leon B MO
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Posted: 13 Oct 2024 at 1:41pm |
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Definitely Steve. And I will post here on outcome.
Leon B
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Uncle always said "Fill the back of the shovel and the front will take care of itself".
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