Removing and replacing suspension knuckle.

To replace a knuckle, or perhaps to fit lowering pins, first remove the hydragas sphere as detailed in this HOW TO. .

You now have this.



Remove the spring, and the spacer.






At this stage, you can remove the knuckles to replace or to clean and re-grease them.



The knuckles are a push fit into the suspension arm, so can be gently levered out with a flat bladed screwdriver under the discoloured lowest lip. ( Caution - the lower part you are prising out is only plastic and can be very brittle)





Now clean out any remaining grease from the cup in the arm and then add a fresh dollop of high temp grease.

I also took off the lower split ring to allow me to lift the rubber cover off the knuckle and inject grease into the knuckle joint. At this point, to replace the standard pin you will need to disassemble the knuckle. Remove the slit ring from the top of the rubber boot. Now, if you hold the plastic surround and push down on the pin, the lower part, the steel fulcrum, will pop out. Then the pin can be pushed through and out of the plastic housing.

You can check if you already have lowering pins fitted at this point. With standard knuckles, the pins are 90mm long. Lowering pins are 80mm long.



Relace with the new pin and carefully replace the steel fulcrum into the plastic housing. Pregrease these parts before re-assembly.

Refit the cover and split rings before refitting the knuckle to the suspension arm. The lower plastic part is keyed to fit the cup in the arm.

Then you need to pump new grease into the arm using the adjacent nipple until clean grease is forced out at the ends of the arm pivot..