Sturmey-Archer Service

The 3 speed rear hub on a Raleigh Chopper is a Sturmey-Archer. The one on my newly acquired chopper was very stiff so download worksheet and have a go.

The 3 gear Sturmey-Archer with 70-11 date stamp.

Remove both lock nuts

Remove the round spring retaining wire

Remove top spacer

then remove the sprocket.

Now remove the second thinner spacer.

After removing the chrome chain  guard lift the back dust cover.

remove cup lock washer

Remove the top outer cone.

The Spring clutch is visible.

Clutch spring removed.

Lift out the Sprocket drive.

Inside is full of  hard muck, not sure what.

Now dismantle the Sprocket drive to check the bearings.

Bearings are OK just very dirty 

Plus the race had dried crud on.

Now tap the outer edge clockwise to remove the ?????

Now the main internals are in view.

Lift out the outer planetary gear and slip up the slotted cup.

Now you can remove the centre pin.

Pin out,

With the pin removed this ???? star can slide off.

The main inner planetary gear can now be lifted out.

At the base I found a broken spring this is used to engage the drive.

This is the other  (good) spring
.

The spring pushes this tooth into the drive slots.

All the bits for cleaning.

All nice and clean with new springs.

Sprocket back on.

Tighten up both side lock nuts.

FINISHED ITEM

The Yellow 1970 STRIP DOWN

This bike has had a tough life.




First off with the pedals

Are these MKI or MKII. ?? Please leave a comment if you know?










Then off with the chain wheels

Off with the Gear Shift. Again I have no idea what is missing on the numbered window or red/orange slide.

Off with both brakes.

They are both heavily pitted and need re-chroming .

 next the bars come off and looking at the pictures on some web sites theses may be MKI or MKII please can you tell me?



















Now to the kick stand. no fancy tools for me.











Grind a notch into a clamp from the £ shop.













Place a fat washer and slowly tighten the clamp an out pops the pin, easy p easy.

Next the butchered crank collars, grind the bulk off then using a file to remove the last bits.













One end off easily.

This on (left-hand thread) was a different job. it would not budge. so I welded a large nut using dissimilar welding rods and the un screwed with a large spanner.



Needles to say I now need a new set.

 Lots of re chroming needed.

Front mudguard to far gone I am afraid.

The finished frame ready for re paint. Same Yellow