Torque for PMag install ...

swisseagle

Well Known Member

• Apr 15, 2017

• #1

Hello,

heading to the airport to make service/annual work.

Need to pull the PMags to check the cotter pin.

Somehow unsure about the torque on the studs to fix the PMag ...

Do I apply just standard Lycoming torque on the nut/stud for the correct size?
Acc. to Table 1?

Thanks for any heads up-

 

drill_and_buck

Well Known Member

Patron

• Apr 15, 2017

• #2

204 inch pounds. Don't forget to replace the star lock washer with a new one

 

swisseagle

Well Known Member

• Apr 15, 2017

• #3

Thank you Mike!

The star-washer can de a show-stopper ... if you run out of them.
There was not enough time to do it today, but tomorrow.

 

pilotkms

Well Known Member

• Jul 10, 2017

• #4

204" pounds?

Wondering if there is a reference for this? Lycoming manual indicates 1/4" bolt and nuts should be 96-106 "pounds. I think they are 1/4". I want to do it right so they dont fall out.

 

J

jabarr

Well Known Member

• Jul 11, 2017

• #5

The nuts are 5/16 x 18. The table above is not for the mounting nuts. Overhaul manual lists the torque at 204 in/lbs.
http://www.expaircraft.com/PDF/Lycoming-OH-Manual.pdf

 

pilotkms

Well Known Member

• Jul 11, 2017

• #6

U are correct - 5/16 and 204"/pounds. Thanx. I'm going to verify the torque on mine tomorrow morning.