05-07-2018, 04:19 PM
They need to be reamed for 2 reasons.
1) They must be accurately in line as well as an accurate diameter. The only way to ensure this is to fit slightly undersize bushes and then ream them.
2) They are a press fit in the housing and therefore compress slightly when being fitted.
The short king pins are for Girling braked axles with detachable brake back plates. The long pins are for Austin brakes.
The short pins use a core plug for the grease cap. I've never persuaded them to stay put when pressurised with grease.
Long pins hava a screw in grease cap.
1) They must be accurately in line as well as an accurate diameter. The only way to ensure this is to fit slightly undersize bushes and then ream them.
2) They are a press fit in the housing and therefore compress slightly when being fitted.
The short king pins are for Girling braked axles with detachable brake back plates. The long pins are for Austin brakes.
The short pins use a core plug for the grease cap. I've never persuaded them to stay put when pressurised with grease.
Long pins hava a screw in grease cap.
Jim