Hydro 186 HELP, please!

Bob

Well-known Member
Hydro 186 hydro lever works it's way down from the desired speed down to neutral, if given enough time.

Where's the "friction pad" that prevents that?

A quick look at an I&T Manual (doorstop) doesn't answer the question... is it INTERNAL to the "control cam" area at the LH side of the clutch housing/tranny case?

Any and all help appreciated!
 
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JimN
 

Thanks for the reply, but BTDT.

Don't see ANYTHING that applies friction to the lever/cable/mechanism to keep the control from slowly falling back to neutral.

Even dug up the factory service manual and spent about 20 minutes perusing it without finding any references to said problem.

I will dig into it further, as it seems something internal in the control area is at fault.

I sure HOPE an IH hydro GURU chimes in on this SOON!
 
Making a friction disk based retainer would be an option. Use a rope and see if the rope will hold it in position with out issue. If so I would just make a friction damper, or spring just strong enough to cancel the drift! JimN
 
Tension from the centering spring on the lever control mechanism and the spring in drive selector valve holds lever against side of quadrant. That is about it. It should take some amount of effort to move lever side to side from both springs. In transmission itself all you are moving is a cam plate and it is pretty well balanced. I will throw this in. That cable operated mechanism is not nearly as nice as the old rod type of earlier model tractors. So many spots to get sloppy. You may take a look to see if someone has added a return spring to keep all the free movement in one direction and that would possibly make your lever creep more. Just follow up where the cable operates the valve .
 

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