Re: Grinding gears on my IH 1486

Posted by Hugh MacKay on March 08, 2007 at 15:24:23 from (216.208.58.141):

In Reply to: Re: Grinding gears on my IH 1486 posted by K.B.-826 on March 07, 2007 at 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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