Heres how I strip, clean and rebuild the 3 speed hubs.

Tools required
Basic spanner set,
Small flat screwdriver,
Pair of cone spanners,
Hammer,
Punch,
Parrafin or degreaser of some sort,
Fresh grease,
Oil.

Remove the wheel from the bike and remove wheel nuts and washers.


With a small screwdriver, gently prize the retaining spring clip from the drive hub



This will allow access to the rear sprocket, 2 spacers and the spoke protector.

Now the hub should look like this



Remove the dust cover and the lock nuts and spacers (note that the drive side spacer is the thinner of the 2)







If the lock nuts proove hard to undo use an 8mm spanner on the spindle to allow more leverage.




Next part is to remove the cones, the drive side one may be a bit stiff to start with as there is a spring on the inside of it.
Dont worry it wont ping off!!






With the cones removed the drive section can be pulled out



The ball cup is the next part to be removed. This is much easier to do on a complete wheel rather than a single hub purely because with a complete wheel you get more leverage!
Place the punch in one of the indentations and give it a firm tap with a hammer. Alternate sides to allow for an even thread break.



Next to come out is the gear ring



The next section is where it gets exciting!!

With the ball cup removed the main gear assembly can now slide out





Place the internals on the bench and start to remove all components.
The first part to remove is the clutch



There are 4 parts to this, the thrust ring, axle pin,clutch and sleeve. Easliy done!

Finally the planet cage and gear can be removed from the spindle



As you strip parts, place them into a container for degreasing



On the planet cage you have 4 planet gears and pins. These can be removed easily with a little leverage from a screwdriver if nessesary. On the other end of the cage you have 2 Pawls, This is where most of the problems occur due to seizure or snapped springs. Once again these can be removed with a little leverage with a screwdriver.



The pawl springs are VERY fine and are easily lost, please make sure you dont lose them



And there ya have it one stripped hub.
Clean all parts and replace in the opposite order.

Good luck  

Thats very helpful paul but still scary to the everyday grifter fan!
(i think your rebuilding service will do very well mate)  

In hindsight I thought it a bit cruel to leave it like that so I've just rebuilt a hub so I can do a rebuild section  ;)

First bits ya need are the planet cage, gears and pins



Simply place the gears in the sockets and drop the pins in.


Flip the cage over and get the pawls and R springs ready

You will notice that there are 2 different size pawls, for this bit ya need the smaller ones.



This is the most tricky part of the rebuild as its a tight fit to re insert the pawls and  springs.
Here is a pic showing what way they fit



Now all ya need to do is slip the pawl into the socket with the spring underneath. Be very careful as the springs can ping!



Once fitted it should look like this




Next slip the spindle through the planet gears so it looks like this

As you look at the picture, the spindle goes in from the left side



Clutch next


These are the bits needed and when fitted to the spindle it should look like this



Insert your spindle and cage into the hub



Gear ring next, heres what ya need



Much easier to fit the pawls and R springs on this bit, heres what way they go round



fitted



Fit the gear ring into the hub



then screw in the ball ring





Fit the drive gear next



Then the clutch spring and washer



Wind in the cones on the drive side next. Get the cone fully wound in then undo it half a turn.
Do the other side next



On the drive side slip on the lock washer, adjust the cone to suit



Next fit the spacers and lock nuts





Note the way the different size spacers fit (Grifters only)

You're pretty much there now



Spoke protector and associated components

Fit the dust cover



Spoke protector



Thicker Spacer



Sprocket



Thin spacer



Spring clip





Job done!

 

--Last edited by bomberman on 2009-05-17 16:38:07 --

that is excellent work paul top man      

oh my goodness
this will be so useful
im printing this info pauls kindly given us and keeping a copy on the workbench
RSW here I come!!

Hi,

Sorry it's not a grifter but I've just bought a 1977 mk2 Chopper to go with my grifter, can anyone tell me what is required at the end of the spindle for the gears to work is it just the nut that the chain goes through? There seems to be something in the spindle whic I first though was the threaded part of the chain that had snapped inside, but it turns freely but wont screw out?



Cheers,

Chris.

Another pic.

i can't help i'm afraid mate, but you could try bomberman over on the raleigh action bikes forum:

http://raleigh-action-bikes.proboards.com/index.cgi

It turned out to be part of the old toggle chain.


Cheers.

is it out then ?

Yeah it's out, I managed to get it out with a thin screw driver. I'm just waiting on the toggle chain nut to arrive now so then I can set the gears. Then Bobs thi uncle!

Cheers.

nice one