To do it, you need a rig that will hold the hub, while you horse (rotate) the drum enough to make space to drop them in. The factory had a special table for that job. You could make something up if you had an old transmision shaft to put in a vise to hold the hub. I don't know if you could do it with the hub on bike, as horsing the drum would be tough in the limited space of the primary. Thought about it myself once, that hub is still in pieces!
I put them in on one side, the easy bit, then compressed the rubbers in an oiled adjustable wrench. Lined them up with the slot they go into and pushed the rubbers out of the wrench with a screwdriver. Worked a treat.
Well, K.C. finds it a hard job to do and almost everybody else didn't find it too hard to do.
Wilfred, what is "tire changing stuff" ? I use WD-40 for tire changing stuff.
In my view, the rubbers aren't crumbling away so I am thinking I might not need to do it. On the other hand I understand that the rubber hardens over time. I just don't want to replace those if I don't really have to.
Do it Jon, easy job and hopefully it will be years before you have to get back in there.
Match the rubbers up to location before removing the old ones, I may be slightly dislexic, remember scratching my head over that, if I recall correctly the old rubbers had taken a "set" and looked slightly different to the new.
Take an old driven plate and add (bolt/weld) a bar to it. After the first set are in use the plate to compress the rubbers and install the other set. Holding the hub takes a spare shaft in a soft vice or slip it on the shaft in the engine and use high gear/rear brake to hold it. A good use for old clutch plates is to bolt a couple drive/driven plates together to lock the chainwheel to the clutch hub.
Jon....tire mounting stuff is a tub of stuff that makes changing tires and even tyres a snap. And it doesn't promote rust on the rims. The local bike shop got me a bucket of it years ago. I gave some to a friend who was having trouble getting new rubbers into his shocks on his 49 MG and that worked too. Comes in an 8 pound bucket and is called tire mount "stuff" from Bridge Products, Inc, Aftermarket Components Division, Muskogee, OK 74402-0769 and is made in the USA. I've had this bucket for quite a while so I don't know if it's still available but I'll ask when I pick up some oil in the next couple of days. Used it last week to get the tubless tire off my wheelbarrow last week so I could put a tube in it so it would stay up. Cheers, Wilf.