R,T & B is a pain on these things due to the nature of the threads on the pitch change links fella. Your men need to be delicate and precise, I suggest a locally made clip on pointer and graduated scale sticker wrapped around the PCL to help. My learned colleague below (3Top) describes the whole procedure perfectly
Also check balance the fan on the back of the engine, when the fan is out of balance it shakes like buggery through the floor and seat backs.
As a previous poster said, depends on the vib freq. One more thing, I have had problems with an R44 which turned out to be driveshaft originated due to incorrect set up of the rear drive shaft belt tensioner.
Any pedal buzz??
Hope that helps.
Last edited by Alloa Akbar; 11th October 2007 at 14:55.