806 Auxiliary valve sticks

rockokloco · Aug 11, 2017

On my 806, the aux valve sticks in the up or down position. I broke the pin on the lever today. Both valves were recently rebuilt because of this problem. It seemed better, (but not perfect) for a few weeks but has gotten just as bad as before the rebuild. I tried to go through previous posts to see if I could find a similar problem with no luck. Is there a way to search previous posts for info? Any help will be greatly appreciated.

IHTimmy · Aug 11, 2017

Take that little plug cap on that valve take a screwdriver back it off a 1/2 or 1 turn and try

fastfarmall · Aug 11, 2017

Well thanks Timmy, my out side one sticks a little, also !!

IHTimmy · Aug 12, 2017

What it is detent is set to tight just back it off a little

fastfarmall · Aug 12, 2017

Just a little too tight, it works fine when it can self cancel, but definitely has a mind of it's own !!

charlieu · Aug 12, 2017

(quoted from post at 23:39:59 08/11/17) On my 806, the aux valve sticks in the up or down position. I broke the pin on the lever today. Both valves were recently rebuilt because of this problem. It seemed better, (but not perfect) for a few weeks but has gotten just as bad as before the rebuild.

I would suggest that you check the torque on the three bolts that hold the valves to the right hand seat support. I'm thinking the torque is something like 25 ft lbs. They don't have to be extremely tight.

pete 23 · Aug 12, 2017

I agree on checking the torque of those three bolts and twenty to twenty five ft. lbs max. Have seen it but the detent is also equally important with adjusting the screw under rear cap. I had my own quick easy way of adjusting the detent but won't get into that.

rockokloco · Aug 13, 2017

Adjusted it today. Was going to replace the pin and try it. Turns out it was not the pin that broke. The shaft broke where the pin goes through. I will order a new shaft/lever tomorrow and try it when I can.

pete 23 · Aug 13, 2017

That outside lever is one of IH's mess ups. The shaft is so small where it goes through the hollow shaft for inside valve that it is a common failure. Really ran into problems when they increased the hydraulic pressures on the 66 series and still farther on the largest 66 series. They increased the detent pressure to correspond with the increased hydraulic pressure by making the detent piston smaller and detent spring stronger. I have cut off a small amount from the end of that detent spring to make the lever much easier to operate on that outside lever other wise you might have to back that adjustment plug nearly out of the valve.

rockokloco · Aug 13, 2017

Great info, Thanks Pete

rockokloco · Aug 18, 2017

At $75 for a used lever plus $20 shipping, I decided to make my own lever. After adjusting the plug problem was still there. I took the valve apart. Turns out I didn't get the latching piston installed properly when I rebuilt the valve. Now I can operate each lever with just one finger. I can't remember them operating this easily even when I was little.

806 Auxiliary valve sticks

rockokloco

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