Clunk from PAS Box

amcdonald

Active Member
Hello

just as I got to thinking I might make some progress on my restoration that commenced seemingly somewhere near to the end of the Cretaceous Period, I have a knocking clunking sound that seems to be coming from the PAS box on my NADA. There’s no fluid in it, and it happens when you move the wheel to the left within the free play. It appears like the shaft at the base of the PAS box has some vertical slop in it. Can I assume it’s a seal or bearing that’s buggered and after painting it all, I will have to take the box out and tangle with the various ball joints? As may be obvious I have zero experience with this particular magic box. Groan.
 
Someone will be along with the correct procedure. But before you take the box out, there is some adjustment via the top mounted screw and locknut.
I believe you raise the front wheels off the ground, loosen the locknut and with one hand feeling the play on the steering wheel turn the screw until the play is minimised. You must not over tighten the screw as you can harm the box internals.
 
Hi

I did check the bottom nut and the bill joints, and all appear right. I had tried turning in the sector adjusting screw with little optimism and that made no difference.
 
I found that the two lower mounting bolts on my NADA 3500S were loose even though one had a locking tab on it. I have the motor out so they were easy to get to I expect it is a bit more difficult with everything in place.

Edward Hamer
Petaluma CA
 
I just put everything back in! The play is definitely in the linkage overall, and it appears to be the box. So not quite as easy as it would have been a few months ago and a lot more annoying as I hoped I was past the stage where big spanners are needed.
 
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