Latest topics
4T clutch strip
Page 1 of 1 • Share •
4T clutch strip
Spent a cracking day off work stripping my 4T engine. Got the magneto side stripped without a problem but have hit a snag right at the end of the clutch strip. Ignoring the fact that the copper shim has been destroyed and there are particles of copper everywhere (pic 2), the main problem is that I can’t remove the clutch chain wheel centre off the gearbox main shaft (pic 1). It rotates happily around the shaft in its assembly position but within a millimetre of trying to withdraw it it starts to bind and I have failed to persuade it to move any further after an hour of trying. I can press it back down and have tried twisting it off with the box in first, levering it Etc but it’s too tight on the shaft. Any tips?




fulmar88- Posts : 583
Join date : 2010-03-15
Age : 52
Clutch bearing centre
As you say that clutch centre should just slide off the shaft, i can only assume there is a burr on the shaft preventing it coming off ?? Try a 3 leg puller on it, if this fails then the only re-course will be to take the other side of the gearbox apart and tap the main shaft through the centre with a copper mallet ?
JH
JH
piston 197- Moderator
- Posts : 4256
Join date : 2008-08-17
Location : ross-on-wye
Re: 4T clutch strip
Thanks JH. I'll have to see what pullers are available as the one I have has fingers too thick to get under the clutch centre as the gap is only about 3mm. There doesn't seem to be any burrs or any visible damage. It's almost like it was undersize but was tapped on anyway and has worn a tiny clearance in its installed position on the shaft so it now won't come off. You'd have thought the clutch centre would have worn though rather than the mainshaft. I did try tapping the inner chaincase off the shaft (after removing the nuts/screws) to take the clutch centre with it but access is awkward and it is difficult to keep it square.
fulmar88- Posts : 583
Join date : 2010-03-15
Age : 52
Clutch hub
It may have some of that copper shim trapped in there?
Gentle heat?
Failing that are you stripping the gearbox as you could knock that share through but would still need to be careful
Ken
Gentle heat?
Failing that are you stripping the gearbox as you could knock that share through but would still need to be careful
Ken
kerabo- Posts : 2608
Join date : 2008-02-11
Age : 68
Location : Falcon 87..1936 Cruiser 39. Falcon 81 Green Lane bitsa. Sunbeam S8. Honda Deuville.
Re: 4T clutch strip
New day, new approach. 10 minutes with a makeshift puller and significant force moving it a fraction at a time and the clutch centre is off. Max hole diameter of 14.05mm. Splines measured a minimum of 14.2mm. No wonder it was tight.
Difficult to take a picture whilst holding two spanner’s but you get the gist. I’m assuming that the hole is under size as everything else fits fine on the splines.

Difficult to take a picture whilst holding two spanner’s but you get the gist. I’m assuming that the hole is under size as everything else fits fine on the splines.

fulmar88- Posts : 583
Join date : 2010-03-15
Age : 52

» rhino clutch slipping
» Polaris changes RZR clutch, read if thinking of mods
» Clutch problem
» Clutch mods and battery relocation
» For sale dirty dawg adjustable clutch
» Polaris changes RZR clutch, read if thinking of mods
» Clutch problem
» Clutch mods and battery relocation
» For sale dirty dawg adjustable clutch
Page 1 of 1
Permissions in this forum:
You cannot reply to topics in this forum
» Off-set when building rear wheel.
» Cruiser 39 Gearbox
» Off-set when building rear wheel.
» Rigid frame rear stand.
» CRUISER 80 FOR SALE
» Clutch Corks
» 1938 wanderer werke. Villiers
» engine id