Trim wheel wobble

[PT20J]

I've noticed a bit of wobble in the trim wheel on my M20J. It wobbles maybe
a quarter inch left to right when the wheel is grasped at the top or front.
Anyone know how much wobble in the bushing is normal?

[Yetti]

 

[milotron]

Trim wheel on my K is wobbly also and would like to know how this turns out... easy 1/3 to 1/2" movement  at the end of the wheel.

 

This is definitely not chain slop; it is in the bushing/bearing/axle tolerances.  There was mention of a roll pin in @yetti s link. Maybe that helps

 

 

iain

[PT20J]

I removed the trim wheel and gearbox assembly from the airplane to examine it. The steel trim wheel shaft runs through a hardened brass bushing. In my case, both parts were worn causing the wobble. The service manual doesn't mention lubricating this part -- probably because there really isn't a good way to lubricate the bushing without removing the chain, driving the roll pin out of the sprocket and removing the trim wheel/shaft and applying grease. A better design would have been to use a standard size oilite (oil impregnated sintered bronze) bushing. I ordered a new shaft and bushing and plan to drill a small hole in the top of the bushing. That way, at annual I can remove the plastic chain cover and pump some grease in with a grease needle.

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