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Case ih 1688 sieve problems.
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wayneNWAR
Posted 8/20/2011 23:03 (#1922096)
Subject: Case ih 1688 sieve problems.


north west arkansas
My top sieve has broken in the middle I am trying to decide which one to replace it with. The previous owner said he had trouble with it breaking sieves until he put a rigid round hole sieve in it. When he traded combines they put his round hole in the 2588 he bought and put the out of it in my combine. He said he had kept the bushings changed out and they still seem good, but this sieve only has around 1100 hrs and is already broke. Has anybody else had trouble and how many hrs are they good for? I cut wheat, corn, and soybeans and wondering what would be my best option and where is best place to order from? Would a rigid round hole sieve work good for all my crops? TIA
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Jon
Posted 8/20/2011 23:25 (#1922127 - in reply to #1922096)
Subject: RE: Case ih 1688 sieve problems.



Callao Missouri
If you have 1100 hrs on the shoe components of an 80 sized machine you are 500 hrs overdue for new bushing's pivot bearings and shoe exocentric bearings. Jon


PS I really like my Peeterson Adjustable Air Foil sieve. I have had it in a 1680, and 2188 now.

Also if you have an 80 sized machine buy the tool to push those bushing's in and out and you will be more likely to change them more often. Jon
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BackAcre
Posted 8/20/2011 23:41 (#1922155 - in reply to #1922096)
Subject: Re: Case ih 1688 sieve problems.


If memory is correct there is an update kit to larger shoe shaker bushings. Replace all of them before you ruin your new sieve. Make sure you " center " the shoe stroke when installing
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wayneNWAR
Posted 8/20/2011 23:47 (#1922163 - in reply to #1922127)
Subject: RE: Case ih 1688 sieve problems.


north west arkansas
I am guessing about 500 hrs on bushings, and what are you calling the pivot bearings( are they the needle bearings)? What is the bushing tool like? On my 1460's I have always just used my shop press.
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Old Pokey
Posted 8/21/2011 00:53 (#1922210 - in reply to #1922163)
Subject: RE: Case ih 1688 sieve problems.



 Look up part#B96214. It is a shaker bushing die set. I have one for my 1680. It works awesome. You still use a press, it is just the proper size dies to make the change out done right. If you push on the inner tube at all, you can ruin a bushing in no time. You do have to observe the chamferred side of the arms to push the new bushing in properly.

 

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hillfarmer
Posted 8/21/2011 07:32 (#1922275 - in reply to #1922155)
Subject: Re: Case ih 1688 sieve problems.



is there a

"timing" that needs to be done

or should be done on the rocker shaft
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BackAcre
Posted 8/21/2011 08:26 (#1922330 - in reply to #1922275)
Subject: Re: Case ih 1688 sieve problems.


Shoe should be in center of throw when installing bushings. Also, it is best to store the machine in this neutral position to relieive stress on the rubber bushings
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hoggy76
Posted 8/21/2011 08:55 (#1922370 - in reply to #1922096)
Subject: Re: Case ih 1688 sieve problems.


Lake Village AR
I just pulled a set of screens out of a 2388 with 3500 hours and they are the original set, the only break is one of the loops on the back where it bolts in. The owner bought it new and has brought it in every year for service. I suggest replacing the bushings, needle bearings, bearings in the cam arms, and cams if needed and the bearings on the bed auger shaft and starting fresh, and along with centering the stroke before tightening make sure the cam arms are timed, I cannot recall if a 1688 has the half moon keys on the hex shaft or not to line cams up on. And use plenty of never-seize on the hex shaft.
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arcticcatfarmer
Posted 8/21/2011 09:17 (#1922417 - in reply to #1922096)
Subject: RE: Case ih 1688 sieve problems.


Tip of the Thumb of Michigan
Seems to me I've heard the shaker assembly the sieve mounts to can hit the frame somewhere. Something about the back axle A-frame. I think someone posted about it a few years back on http://www.thecombineforum.com/forums/
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prttimefarmer
Posted 8/21/2011 09:41 (#1922465 - in reply to #1922096)
Subject: Re: Case ih 1688 sieve problems.


NW Minnesota
Call Heartland repair services in Ross N.D., 701-755-3326. They make a kit that will solve the sieve breaking issues and greatly extend the life of the bushings on the 1688's. Our 1688 had the same problem and we went through changing bushings, timing, centering and all that with the dealer but still had problems with seives breaking. We ordered the kit and the mechanic at the dealership was skeptical but he put it in and we haven't had a problem since in about 900 hours. Our machine always made a cluck cluck cluck noise when it was going down the field and we could never isolate what the sound was, turns out the shaker assembly was actually hitting the frame in the back of the machine putting alot of stress on the whole cleaning system, once the kit was installed the noise was gone and we haven't had a broken sieve since, if I remember right he said said this problem was on the 1688's, 2188's and early 2388's. I think caseih dropped the ball on this one.

Edited by prttimefarmer 8/21/2011 09:50
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prttimefarmer
Posted 8/21/2011 10:07 (#1922523 - in reply to #1922096)
Subject: Re: Case ih 1688 sieve problems.


NW Minnesota

Join Date: Dec 2006
Posts: 4

Default Re: broken top sieve
I found this that explains it better than i did,
The problem with your broken sieve is the chaffer assy and shoe assy are hitting inside of the combine. The chaffer rails are hitting the front of the combine on the forward stroke and hitting the auger bed corners on the back stroke. The shoe assy is hitting the tailings auger top cover on the forward stroke and hitting the rear frame [steering axle support assy] on the back stroke. There are other contact points on the cast bearing supports and mounting bolts. Broken chaffer sieves, rails, bolts or frequent bushing failure is very common on these combines. I have a cleaning system repair kit for these problems. The CSR Kit moves the steering support back 3/4", has a rubber flap that goes under the shoe to stop tailings/air loose and shows all of the contact points that need to be removed. I have not seen any new combines with a spacer at the steering support assy, if there are I have a patent on my kit and CIH could have a problem. Contact me [Gordon] at 701-755-3326 or 701-629-1469. Brochure at www.csrkit.com. The csrkit costs $270.00 plus shipping and handling. Farmers are having the same problems in England, Australia and Brazil. Thank you Gordon.
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wildcat1
Posted 8/21/2011 15:53 (#1922965 - in reply to #1922523)
Subject: You have the solution there...


South Central Kansas
Had my 2388 in the shop last winter and they said it needed new bushings and pivit shafts after only 250 hours in two years. I had a Heartland repair kit that I had never put in so I had them do it. Hoping it solves the quick degneration of the bushings.

Combine runs smoother and quieter now than ever. When you shut off the seperator, it takes about 3 minutes to stop completely with NO rubbing noise whatsoever. Seems like it used to stop in less than a minute when the switch was shut off.
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4020dt
Posted 8/21/2011 18:55 (#1923212 - in reply to #1922096)
Subject: RE: Case ih 1688 sieve problems.


NC IL
1688's , 2188's amd early 2388's had a speeded up shaker system compared to previous models . Somewhere around 2001-2 they slowed them back down . They used to make a slowdown kit , I put one on my 2188 when I got it four yrs ago . The kit was listed in the parts catalog they sent out each summer . Don't know if it is still available , haven't checked this years .Funny thing , when I inquiered about the kit when I was dealing on the 2188 they never heard of it . The dealership I'm dealing with now said they always put them when they come in to get worked on .
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