CIH 1660 hydraulics

Dave H (MI)

Well-known Member
Now that I have the 863 corn head on the combine I guess I best bounce this one off the experts. Feeder house hydraulics bleed down pretty quickly after raising head off the ground. Not dangerous at this point but you can see it moving ever so slightly. Come back in half an hour and it will have migrated from full up to full down. Since I have not found an affordable service manual or parts book, could someone give me an idea of what might be the problem? These are big cylinders so if were just a leak in a line I think it would be obvious. I am thinking a leaky valve or bad O-ring someplace in the system. I can handle this if I have a clue where and what. Thank you!

(Hate to sound like a kid at Christmas but the 863 looks pretty sweet on the combine now that it is all straight and everything tight.)
 
Must be the nature of the beast. Mine does it too. I finally got tired of it this fall and pulled the only part off I could without removing the valve stack- the part where you adjust header drop speed. I replaced a broken spring, and some obviously worn o-rings. Made no difference!
 
Obviously something is wrong either in the valves or cylinders. Our 1640 never did any such thing and neither does the 2166. I don't have the service manual either to help out. After contuinuing to read your on going problems with this machine I see why the previous owner sold it and I'm afraid you kinda got it stuck to you with the gremlins.

Brad
 
The header lift load check poppet is either cracked or has something stuck in the seat. There's two different styles on a 1660. Does the hydraulic valve stack run horizontally or vertically? (It's under the step just outside the cab door, the one you stand on to look into the bin)
 
I am going to have to take a rain check on looking into that tonight. If it is inside the step and I have to remove the cover then I won't be able to get to it until at least Sunday. Very dark out there and we are having a hard freeze tonight. Just came in and there is ice in the wet areas. I will look at it when I can get back out there and post back. Appreciate the help.
 
Gots to be something! I would like to get some clues even though I won't be even trying to fix it this year. I'll do what I got to do to get thru harvest but them I am closing the shop up for the winter so I can spend some time making money.
 
First. A really good policy is to proof read your posts before you send them. Might keep you from putting up an unkind and undeserved response to someones question...and, by the by, making yourself look...

Second. I have no idea if you are talking about my CIH 1660 combine or my CIH 863 corn head. The combine is a very nice machine which I bought at auction from the fella who processes my poultry. Starts every time, even this AM when it had yet to hit 30 degrees and it was outside. It is 30 years old and it has a couple lights that don't work and a few leaks. I'll bet it has a few more problems too, but I sort of expect that, all things considered. The 863 was an expensive piece of scrap. I rebuilt the thing from the ground up, learned a lot, made some friends and I now have a pretty darn nice corn head for a couple grand and a lot of hours. I'm happy with my deal. Why should it bother you?

Incidentally, you jumped on my post but did not answer my question. What is your take on my hydraulic bleed down?
 
Sorry Dave, didn't intend for that to be or come off as rude or disrespectful. It just sounded like the problems you have encountered thus far that someone maybe tried to dump the combine and let some other person get stuck or taken advantage of with the problems instead of the previous owner fixing it is all. Those types of things happen all to often on sales and such sometimes with major repairs needed. I have not encountered that problem with either of the machines we have/had. I never had the high priced hard to find service manual for ours either, otherwise I would look in it to help you out.
 
No problem. I have done the same thing many times. Used to have a friend on here told me all the time I was too abrupt in my replies and it sounded offensive. I told him to take a hike (just kidding!)

If there is one thing I am absolutely sure of when I buy an old machine...if it was perfect, the seller would likely keep it. This guy got a smokin deal on a much newer machine, kept mine around for a year as a backup and then decided the new one was gonna work out...so here we are.

No offense taken and none intended on my end. I'll fix my leak and maybe someday I can tell you how to do it!
 
Happened on my 1660 too. Wound up being the plastic poppet in the valve stack. Be prepared for sticker shock!! That little poppet cost $80 and came in a package for two! I asked the parts guy if I could just take one for $40. He replied, "I was hoping you be out of the store before you looked at the ticket. "
 
Yes! Been using that just lately. And I "rediscovered" that I can print those out and they are as good or better than the original book. Do miss the service book though!
 
You have to have a sense of humor to sell parts at CIH, no doubt about it. Almost as much as if you BUY parts at CIH. So now I have to go out and look at the valve stack and see if it is vertical or whatever. Been in Chicago the last three days, most of it outdoors...still half frozen. I think the dang leak can wait another day. :)
 

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