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Farmall & IHC Tractors Discussion Forum
Show Parts for Model:

Grinding gears on my IH 1486

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Ron Bailey 1486

03-07-2007 07:18:01
69.19.14.19



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IH 1486>>>> When I ingage the high - low gears the gears sometimes grind, I recently replaced the clutch and the guy was supposed to replace sometype of gear break the is supposed to have stopped it from doing this. Where is this gear break and how can I adjust it to stop the gears from grinding. Or How can I ger it to go into gear without it grinding?

Thanks Ron ronqqq@bellsouth.net




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JayIH man

03-11-2007 21:09:16
70.243.238.51



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 Re: Grinding gears on my IH 1486 in reply to Ron Bailey 1486, 03-07-2007 07:18:01  
To solve all grind problems on the 86 series you can update the trans brake to a 30 series which is electic over hyd. It has 2 piston brakes that are in speed trans bottom cover. Check with Case and see if this kit is still available. If not find a 30 series in salvage and rob the parts to correct this problem.



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K.B.-826

03-07-2007 18:05:31
24.180.155.91



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 Re: Grinding gears on my IH 1486 in reply to Ron Bailey 1486, 03-07-2007 07:18:01  
Read Hugh MacKay's post below, and keep in mind that on these tractors, it is impossible to shift into high, low, or reverse without grinding unless the tractor is at a dead stop. If you are at a dead stop with the clutch pedal all of the way down, the engine at low idle, and have waited at least 3 seconds and you still have grinding, then your trans brake is out of adjustment or the pad is gone.

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Ron Bailey

03-27-2007 14:53:22
68.19.138.205



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 Re: Grinding gears on my IH 1486 in reply to K.B.-826, 03-07-2007 18:05:31  
Thanks for your post, I had a trans brake put on when the clutch was replaced.. But it still grinds,, How do you adjust these things?? Im all ears ... Thanks for any info!!
Ron



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Hugh MacKay

03-08-2007 15:24:23
216.208.58.141



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 Re: Grinding gears on my IH 1486 in reply to K.B.-826, 03-07-2007 18:05:31  
KB: I often wondered why IH and indeed other manufacturers didn't do that transmission brake another way. The other way I'm thinking is an electric over hydraulic push buttons on both gear shift levers, that would not activate unless the clutch were down.

In fact I think a couple of European tractors are using that today. I drove one last fall, never saw a manual or talked with anyone who fully understood it. If you pushed the button on either the high-low-reverse or the 4 speed lever it depressed the clutch and you engaged any gear or combination of gears with not a grinding sound of any kind. If you depressed the clutch with your foot, did not push the button, one waited a long time for those transmission gears to stop.

I think it was a bit more complex than I've described, as you could also push the button and shift on the go, almost like TA except there was hesitation, but if you were shifting one gear to the next in the sequence, it would shift on the go and was very smooth doing it. This tractor was about 90 hp and had less than 1,000 hours on it. I not up on some of these newer names, would it have been Valumet. It was 4x4, had a loader and I did some loader work with it. On forward-reverse shifting, if you always pushed the button there was never a sound from that transmission even with rapid shifts. If you didn't push the button it was as bad forward to reverse as any tractor I've ever driven.

This system was definitely geared for shift on the go, I found that out doing loader work. It was not very smooth if you didn't use the clutch pedal to start from standing position. If standing and you let you finger off button in gear, it was as vicious as I've seen. Worse than my grand father at 79 with W4 and me trying to build a load of hay.

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Owen Aaland

03-07-2007 17:00:14
65.165.246.14



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 Re: Grinding gears on my IH 1486 in reply to Ron Bailey 1486, 03-07-2007 07:18:01  
"the guy was supposed to replace sometype of gear break"

If he replaced the tranmission brake with the original style then it is adjusted like the manual shows. If the brake assembly was replaced with an after market version then the adjustment procedure may be different.

The adjustment is made on the right side of the clutch housing. There is a rod that is operated off the clutch shaft. On the rear/lower end is an adjustable clevis that is attached to a lever. The adjusment is made at this clevis.

1) Remove the pin through the clevis.

2)With the clutch held all the way down, push back on the lever, and adjust the clevis so the pin holes line up.

3) Turn the clevis 1 1/2 turns farther out, relea
se clutch, and replace pin.

Check adjustment by running the engine about 1000 RPM. Fully depress clutch. Wait about 3 seconds and you should be able to shift into gear without grinding. Extend clevis out further on rod if transmission does not stop soon enough.

If the brake pad inside is worn out you will not be able to get the tranmission to stop correctly if adjusted like this.

If the rod on the right side is welded to a tube with a gease zerk on it the adjustment is different. This system uses a metalic brake pad and a spring inside the tube in the rod. This style is adjusted with the clutch released. Simply adjust the clevis so the pin can be inserted.

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Ron Bailey 1486

03-07-2007 07:31:34
69.19.14.19



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 Re: Grinding gears on my IH 1486 (Trans brake) in reply to Ron Bailey 1486, 03-07-2007 07:18:01  
ALSO>>>>>I have heard this called the trans break... How do I adjust it? I am at a full stop when I am trying to switch gears.



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Hugh MacKay

03-07-2007 16:26:13
209.226.247.123



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 Re: Grinding gears on my IH 1486 (Trans brake) in reply to Ron Bailey 1486, 03-07-2007 07:31:34  
Ron: The 1486 operator's manual will tell you exactly how to adjust that transmission brake.

If your new to these large chassis IH tractors, you probably have a habit to break. When you stop forward or rear movement of tractor, NEVER push the clutch pedal all the way down until tractor stops moving. The clutch pedal activates that trans mission brake when down. You have to learn to press clutch pedal just far enough to release the clutch, then after tractor stops push it rest of way down. Applying that brake while tractor is moving will tear it to shreds in a month.

Don't ask me how I found out. I will tell you it was 30 years ago.

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K.B.-826

03-07-2007 17:59:24
24.180.155.91



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 Re: Grinding gears on my IH 1486 (Trans brake) in reply to Hugh MacKay, 03-07-2007 16:26:13  
Hugh, you're right on about correct operation of the clutch pedal/trans brake. Too bad that wasn't explaned to the original owners of these tractors by the salesmen, we wouldn't hear so many shift linkage complaints today. Same goes for TA operation.



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georgeky

03-07-2007 21:21:13
64.12.116.71



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 Re: Grinding gears on my IH 1486 (Trans brake) in reply to K.B.-826, 03-07-2007 17:59:24  
K.B.-826 I hate to admit it but I was reading over at the JD forum and they were really down on IH TA I suppose they dont understand how they were designed either. I have some still running on origainal TA but I take care of them.



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flying belgian

03-07-2007 20:18:01
207.13.162.207



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 Re: Grinding gears on my IH 1486 (Trans brake) in reply to K.B.-826, 03-07-2007 17:59:24  
You are so right on the ta. On my 706 we never shift ta on the go. just use it as 8 more speeds. tractor has 7000 hrs. on it and ta is as solid as new.



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Hugh Mackay

03-08-2007 17:30:26
216.208.58.141



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 Re: Grinding gears on my IH 1486 (Trans brake) in reply to flying belgian, 03-07-2007 20:18:01  
I put well over 10,000 hours on each of my 560, 656 and 1066 and they were shifted hundreds of times per day on the go. In working gears one will never hurt them. I do believe one should adjust the throttle to compensate fot the shift in road gears, both up and down.

In total close to 75,000 hours on 5 TA equipped tractors and only one TA replaced under 10,000 hours, and that was the first one being a 300. We try to learn from our mistakes, and not blame them on the tractor. By the way, I also got 13,000 hours out of a Deere Power Shift, and there were folks that called those junk. Same principle applied, adjust that throttle to compensate for change in road gears. Once you get over 10 mph, it's the same principle as a truck, eliminate the shock load when shifting.

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georgeky

03-08-2007 16:50:29
64.12.116.71



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 Re: Grinding gears on my IH 1486 (Trans brake) in reply to flying belgian, 03-07-2007 20:18:01  
Shifting on the go won't hurt a TA that is what they were designed for, however you can not downshift as a means of slowing down tractor that will overrun the unit and cause premature wear just like free wheeling it over hill. If used the way intended they will hold up for years. I have a 1957 350 and 74 666 that have original TA in them and they both work flawlessly. The 666 has 8100 hours on it and who knows on the 350 the tach didn't work when I got it ,but it showed 6900 then. I fixed the tach and is now showing 8840 hrs on it. They could go tomorrow.

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Michael Sheik

03-07-2007 10:09:49
199.153.205.246



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 Re: Grinding gears on my IH 1486 (Trans brake) in reply to Ron Bailey 1486, 03-07-2007 07:31:34  
Look under the archives and search for "1066 Clutch Adjustment" I think and it will show some where Tractor Vet responded on how to adjust clutch, T. Brake for my 1066. I have no clue if the 1486 is the same. Wish Tractor Vet would respond as he is sharp on this stuff.



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