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Farmall & IHC Tractors Discussion Forum
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986 Brakes

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James from PA

02-01-2005 11:52:09




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After a long search I finally got my new 986. It had a few bugs I had to work out but I am having trouble with the brakes. First the break wear indicator light is on, which more than likely means I need brakes. But when I move the tractor foward or backward and then I push the clutch in the tractor stops itself without touching the brakes. Could the brakes be that bad that it is holding itself, or could the brakes be adjusted up too much, or the tractor sat around for about a year without much use or movement, would something be rusted & hanging up? I can not hear any noise like metal rubbing together but I do not have to press the brake pedals in much before they seem like they do not want to go in anymore. I have minimal knowledge of hydraulic wet brakes so any information on the subject would be greatly appreciated. Thanks.

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James from PA

02-06-2005 16:33:54




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 Re: 986 Brakes in reply to James from PA, 02-01-2005 11:52:09  
Thanks everyone for the help. I adjusted the clutch, dump valve, tranny brake & tranny shifter linkage. It seem to have solved my problem.



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K.B.-826

02-01-2005 19:00:49




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 Re: 986 Brakes in reply to James from PA, 02-01-2005 11:52:09  
Your TA dump valve is out of adjustment. To confirm this, put the TA in Direct (lever up) and get the tractor on a slight slope where it will hold like the brakes are locked when the clutch pedal is depressed. While holding the clutch pedal down, pull the TA lever down. If the tractor starts rolling, you've found the trouble. Now would be a very good time to get youself a manual and adjust the clutch free travel, dump valve, transmission brake, and the TA linkage. Wouldn't be a bad idea to adjust the speed and range shift linkages while you are at it. The speed and range transmissions get hard to shift when the dump valve is out of adjustment. If you continue to run the tractor like this, eventually it will get so hard to shift that you'll start forcing the shift levers, which will do further damage, you'll start getting hung up in two ranges, and you'll get the fun job of replacing the linkages all of the way from the levers to under the transmission covers.

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James from PA

02-01-2005 14:16:21




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 Re: 986 Brakes in reply to James from PA, 02-01-2005 11:52:09  
Thanks everyone for all the things to check. Here is another question, I noticed that there is something leaking around the head gasket on the exhaust manafold side. It does not appear to be antifreeze. It seems to leak a fair amount when the tractor is at idle. Would it be possible that it is engine slobber coming out of the exhaust manafold since the tractor is not running at a high enough rpm to burn it off? Thanks.

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Allan in NE

02-01-2005 14:18:15




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 Re: 986 Brakes in reply to James from PA, 02-01-2005 14:16:21  
John,

That's probably exactly what it is if it looks like it is ozing oil outta the exhaust manifold area.

Your tractor needs a good workout. :>)

Allan



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RAS

02-01-2005 14:49:49




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 Re: 986 Brakes in reply to Allan in NE, 02-01-2005 14:18:15  
Like Allan said it needs it @ss stuck in the ground with a good load.



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RAS

02-01-2005 13:55:37




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 Re: 986 Brakes in reply to James from PA, 02-01-2005 11:52:09  
After all you checks don't forget to check your ta dump valve. If you have it in direct drive and the dump valve is not set correct it will not dump the oil to the clutch pk and it will cause the tractor to stop. Just something else to think about.



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Allan in NE

02-01-2005 12:51:49




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 Re: 986 Brakes in reply to James from PA, 02-01-2005 11:52:09  
James,

Just throwin' out ideas; but, that tranny brake isn't out of adjustment is it?

Those are really nice tractors. Glad you found yours! :>)

Allan

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trulyred

02-01-2005 12:14:37




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 Re: 986 Brakes in reply to James from PA, 02-01-2005 11:52:09  
If the tractor has been sitting a long time the first thing to check is the brake pedal linkage. Remove right side hood where brake linkage and valve are located on the firewall. Take the pins out and be shure everything is working freely. As far as pedal adjustment the pedal should move slightly without moving the valve spool. Normally there is enough slack in the linkage pins to allow this. From here you will have to remove the drums and check out the problem there, piston stuck or broken off linings fouling up the works.

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