hi there, can any one point me in the right direction , ive no manual also looked on the net and not found anything of much use , I want to put a roller pedal on my accelerator arm and do away with the standard pedal. how do I remove the shaft ? rather have an idea instead of going in blind !! any tips or a link would be appreciated .thanks 

You just need to remove the clip holding the original roller pedal in place. And fit a scale board wheel.
If you want to remove the pedal arm you will need to remove the whole pedal assembly in its entirety from the floor pan.

Like Shaggy says,  I fitted a skateboard wheel to mine, it requires no modification and can be done in situ. The original wheel is just held on with a circlip and the shaft is exactly the right diameter for a skateboard wheel, I think I just added a washer either side of the wheel to stop it sliding around

I know everyone fits wheels and things to the VW roller on the accelerator
pedal arm, I just thought I would mention that the roller was used to run
behind VW's flat accelerator plate and leverage was built in, I have always thought
they seem very stiff when used with only a roller, ie 'direct action.

I thought I would put up a picture of my assembly, sorry about the mess, I know it really needs
a clean... 

I just cut the roller upright off and re welded a long section of another throttle bar so as to extend the
height, to this I welded a piece of tube, the photo also shows how I made the clutch and brake pedals
much more comfy to use.

The original pedal face is behind a rectangular lump of 2.5mm steel sheet, welded and wrapped over it, I covered
it all with perforated sheet.

The throttle is very light and precise and it lovely to use, the brake and clutch are also very comfy 

Just my thoughts 

The two clips round the main shaft are my infinitely and separately, adjustable pedal position stops, the heads of which
rest against a small piece of 12 x 12 x 50 angle welded just behind the pedal bar 

Peter

thanks for the info, if I fit a roller and do away with the original pedal there's a bit of fabrication as the shaft wont be long enough, the roller is  at least 75mm wide for a guess ill have to measure to be correct though " bit of anal snobbery here, its black and yellow to match my buggy  and its not like your average skate board roller ".  . ill look into  how hard the pedal is to press with a s/b roller . thanks again gc..

What year is your chassis?

hi its 1970 I belive