12 f


  Does anyone have a rd1c installation guide or advice. I
want to   check before bolting the psru back up for engine runs.
Wasn't there a viton seal recommended to seal the bearing/thrust
washer stack against the motor mount plate?    Alex Molteno
Yes but I recommend Teflon.   Paul Lamar


        I will see if I can
dig up my RD 1C manual and email it to you directly.   Scott
Gettings.

Alex, The teflon disc goes between the
input gear and the inner surface of the planetry reduction to stop
metal to metal when you pull power and the input shaft can be drug
forwards.  The prop shaft goes through the center of the teflon disc.
Bearings go against the plate, and make sure you have a low pressure
seal in the plate. A low pressure seal has one lip only, a high
pressure, two or double lip.  Little pressure in the housing so the
low pressure seal does a much better job of sealing as is more
flexible.

        Neil Unger.

    Ok thanks Neil,

    Alex Molteno


Hi Neil, do you have an illustration or picture to show the location of the discs on your drive. My engine has run time on a stand for about an hour when it belonged to Milo Burroughs and there is a slight bit of wear on Tracys motor mount plate at the rear of the drive. I initially figured thats what you were talking about when you said it needs the teflon disc, to stop any metal on metal rubbing when the shaft is not being pulled forward, for instance when the prop is driving the engine on steep descent,

but as i understand it, you recommend to put another disc at the opposite end too for when power is applied and the shaft is pulled forward to metal on metal contact

So 2 discs needed then. Do you remember what thickness you are using for the forward disc, so it doesn't tear it up?

Alex Molteno

That is kind of surprising as those are thrust roller bearings.
They should not need teflon.

Paul Lamar

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