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Combines & Harvesters Discussion Forum

6620 hydrostat ???

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CC Farmer

11-28-2012 15:58:08

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I have a 6620 i have been running for 4 years. never had any major problems. The other day I was cutting beans and when I was going up hill with the grain tank nearly loaded I heard what sounded like belts slipping and the combine slowed to a crawl once I unloaded things were back to normal. I left that farm to go to another a few miles away and I noticed it slowed a bit going up hills on the road. would this be the hydrostat going bad or somthing more simple? Any thoughts on what I could check? Thanks in advance.

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todd Hamilton

12-01-2012 17:23:33

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 Re: 6620 hydrostat ??? in reply to CC Farmer, 11-28-2012 15:58:08  
Yep cousin's 6620 did that, would slip in road gear first, snug the belt up

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11-28-2012 18:29:10

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 Re: 6620 hydrostat ??? in reply to CC Farmer, 11-28-2012 15:58:08  
Like Mike said, your hydrostat belts need adjusted, replaced!
Good luck

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Mike Aylward

11-28-2012 16:59:12

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 Re: 6620 hydrostat ??? in reply to CC Farmer, 11-28-2012 15:58:08  
It could indeed be your drive belts slipping. The larger combines have an automatic belt tensioner when the demand is there. However, the 6620 operates on straight tension as set by you. Check to see if the belts are tight and adjust according to your book. Mike

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