Another day, another dollar. Todays progress:
Fitted new swing arm bearings. Judging by the tales of grief recounted on the forum, I think I got pretty lucky with removing the old swing arm bolts and bearings. Both arms were removed and the bearings knocked out in about 10 minutes. It was a LOT easier to do this with the subframe dropped. I would have spent a lot longer p1ssing about with the subframe left in situ. Anyway all that was a few days ago and since then I've cleaned the swing arms up and painted them. If I had managed to remove the ABS sensors, I would have got them shot blasted and powder coated along with the subframe, but I know the sensors are Not To Be Messed With unless you fancy fitting new ones.
The swing arm bearing kit is an odd set up (to me anyway):
(Photo 16)
Left to right - Bolt head (to outside of car when all's in place), washer (should be under the nut at the other end when assembled), a very hard metal shouldered washer, a rubber grommet/seal that the shouldered washer sits in when all is assembled, a metal bearing sleeve (the shiny metal tube - this runs the full width of the arm), one taper roller bearing (still in its' placcy bag), a central plastic spacer/sleeve (the white thing in the middle). Then it all repeats again in reverse order as you go to the right of the photo, except there's a nyloc nut at extreme right and not a bolt head. The outer part of the right hand bearing is removed so that you can see the rollers.
The first thing to do is to seat the outer of the taper bearings in the trailing arm. I did this with a large socket of about the same diameter as the bearing, and a hide mallet. You can see the bearing outer and the shoulder that it needs to be driven back onto here:
(Photo17)
You can also see the grease nipple I fitted to the swing arm in line with this shoulder (thanks to BikeDoc for this idea
). Hopefully this will stop the bloody thing seizing up or wearing in future. Once it's driven fully home and the white plastic spacer fitted (don't forget to put this in BEFORE fitting the other bearing outer as it gets trapped in place by them), you see this:
(Photo18)
I cut away a small portion of the white spacer to allow the grease nipple to feed grease to the bearing. This spacer is all that seals the inner faces of the bearings from the elements as there's a fair-sized hole in the bottom of the swing arms that will allow water, road salt etc up inside it. The spacer is actually pinched in place by the seated bearings.
Then you need to wind the bearing inners onto the metal bearing sleeve. They are an interference fit so need some force to seat them. The swing arm bolt isn't long enough to allow you to do both bearings in one operation, so you have to fit one then remove the nyloc nut, insert the part-assemble inner/shaft into the swing arm and then seat the second bearing, like so:
(Photo19)
Once that has been wound in nice and tight to seat everything, the nyloc and bolt can be removed and the swing arm put back in place on the subframe. Once I'd got all the cleaned up bits refiited, along with the new springs and dampers, it ended up looking something like this:
(Photo20)
(Photo21)
But for some horrible metal-strapped retaining cliips that fit to the swing arms and one of two small nylon cable cliips, this is now ready for refitting to my Multi. Roll on Monday! I like the
ARB installation and design - the centre span of the bar is pretty much in line with the swing arm pivot bolts, so the twisting moment is on the bar axis. Very neat. Also note the tube bungs I fitted to the large holes in the swing arms - ones for 1 1/4" tube fit really well. I'll keep an eye on them to make sure they're not trapping muck inside the swing arms (which would be even worse than having the hole there in the first place) but I can't see anywhere else that dirt could get in.