The Fordson Tractor Pages Forum

i have installed new king pin bushes but they are too tight to fit the king pin in, do i need to ream them to a size?

many thanks
luke

Yes, they need to be reamed. I think that is said in the service manual also.

cant find that in my manual.

could somone exlain the proscess and the tools needed?

Luke,

You need a adjustable reamer. It must not have been used in steel, because it won't cut. Use small steps to adjust the reamer until the king pin will fit. Use a bit oil when fitting.

luke3hens wrote:cant find that in my manual.

It seems that it is the Major manual which mentions that the bushes need to be reamed. But it doesn't give any instructions. I used a small cylinder honing device with my Major as I didn't have the proper tool.

One could ask a nearby tractor dealer.
That's what I have done and the helped me out.

I would be very wary of reaming these bushes as it would be easy to remove the thin bearing surface and expose the metal shell.

These are thin walled split bushes and can very easily be distorted and collapse whilst being fitted. Ideally you require a mandrel that is slightly larger in diameter than the external diameter of the kingpin so that it prevents the bush from collapsing as it is pushed into the housing.

Dimensions of the required mandrels were posted on the old site as being 31mm dia and 34mm dia.

Gerald

mandrels were do i get one from in the uk, has any one got any idea please i am in the Midlands nr warwick, and why 2 sizes 31mm and 34mm or is it expandable

thank you