1956 RD-18 shear pin part number or size.

[gjonz]

Anyone know the size or part number of the propeller shear pin for a 1956 RD-18?

Thanks!

Greg

 

[F_R]

Re: 1956 RD-18 shear pin part number or size.

Depends on which prop and nut you have. Measure the inside of the nut where the pin goes.

Part number 302566 is 1/4" x 1 1/8" Naval Bronze
Part number 304575 is 1/4" x 1 15/32" Stainless Steel

 

[gjonz]

Re: 1956 RD-18 shear pin part number or size.

I found the old one in my parts box. It appears to be stainless 1/4".

I'd think that would be tough to "shear".

Thanks for the help!

 

[samo_ott]

Re: 1956 RD-18 shear pin part number or size.

I'd think that would be tough to "shear".

There's a lot of force going thru it. And they call it a drive pin also.

 

[F_R]

Re: 1956 RD-18 shear pin part number or size.

It is not supposed to shear. It is called a drive pin. The rubber hub in the propeller takes care of the impact from grinding up rocks.

 

[gjonz]

Re: 1956 RD-18 shear pin part number or size.

Ah ha! Got it! Still learning my way around such things. Makes sense now.

Thanks for the help fellows!

Greg