BSA B40 Swingarm Shock question

[stevehayward]

Hi hoping someone might be able to help.  I am rebuilding my uncles (well my) 1962 BSA B40

I have stripped it and eventually got the frame, sub frame & swing arm powder coated.  I have come to offering parts up before I get the swing arm pivot put in and on offering my new shocks up the top end is fine with the sub frame but the lower ends don't fit.

I asked my uncle about this and he thinks the inner of the old shocks has rusted in place.  If they have they are solid.
I was wondering if someone could advise as when I check sizes with a vernier it looks like he might be right.  If so advice on how to remove would be appreciated.

I've attached a picture - trying to get some other better ones done.

Thanks in Advance

[Willie Dee]

Yeh the inner sleeves are still on the shaft. You will get many answers how to free them off. My choice would be heat them and then quench with cold water. Works for me.

[AdrianS]

Not sure looking at you picture but have you got the thread and the remainders of the bush powder coated?
If so it may make removal a bit more interesting.
Depending on how tight the bush is ( and if powdercoated you don't want to damage the rest of the swinging arm)
I would try soaking with Plusgas or something similar and using some mole grips try and turn the bush you could try some heat as well . Failing that you may have to carefully cut what's left off with a hacksaw or dremel but carefully so no damage is done to the fitting pin.

[DAVE BRADY]

This looks correct and no sleeve has been left on.  The top bush on the shocky is 3/8" as are most as they have a bolt going through two side supports. Because the lower one is only supported on one side the diameter is bigger at 1/2" and stepped down to 3/8" so that the nut and washer bear on the inner sleeve and not the unit itself. The new shocks must have the wrong bottom bush.

Dave. 

[chaz]

the two B40 swing arms Ive just done both had the bush inner sleeves stuck on the pivots, so I got away with putting the sleeves in a vice and gently managed to free them off without having to cut them off. obviously with swing arm off of the machine 

[stevehayward]

Cheers gents, had a closer look today got the vernier out and checked.  The new shocks sleeves match what was on there so conclusion was both sleeves rusted solid.  A combination of heat, grips and muscle moved them eventually. 

Might be back at the powder coaters though  might as well get it so - not like its an easy part to take off later!

Also had a look at the swing arm / frame fitting - think I need someone with a press.  Not equipped for that one!

Forks went together well though.

So a productive day even if it meant a slight step back - although lesson learned as they say!

[chaz]

tape up the diameter of the shock mounts otherwise you will be spending time cleaning the paint off to get the shocks on.
the swing arm bushes may need a press or strong vice then ream out depending if bimetal or the rubber ones.
be careful if getting a press as might push the mount arms out of line.
you shouldnt need a press to push pin in to join arm to frame