So we are rebuilding, we have replaced the rear brake shoes and are struggling to rebuild. Are there any step by step instructions on how to build brake pedal, rods etc....cheers

Forgot to say it’s  a1973 dt3

I was just going to ask what bike 

Anyway... Most are pretty basic so getting your answer will likely be dependent on a description... Or better... Pictures and description... of what you're struggling with.

So we are struggling to find the correct position for the cam lever. My son didn’t make anything when he stripped the bike.
We have set it correctly for the brake to operate but the pedal is too high above the foot peg.
how do we adjust the height of the pedal?

We have tried to move the cam lever forward, but when we do this the brake shoes can be heard rubbing, and when we press the brake pedal.. the brakes release...the cam itself looks ok ie. not warn.

actually wondering if the pedal has been bent somehow.

Would seem to me that you just need to "trial and error" it a while with the spline choice for the brake camshaft lever. Also does the tension bar adjust the length of the rod itself. Or do you need to include the setting of the chain tensioners in the mix as well? Just shooting from the hip, here...

I have not worked on your exact model, but will speak from experience with similar enduros.

On your machine, there is no rear brake pedal height adjustment.  The pedal tops out by hitting the footpeg bracket.  Usually if it is too high, the pedal has been bent.  Heat and force can bend the pedal to its original height.  Sometimes if the original taller rubber footrests are replaced with lower flat metal ones, the pedal seems a little higher.  Pictures would help us to see what is going on.

Here is a classic example of a bent rear brake pedal that JayB mentioned.
 

And here's one that's may be bent? This is a '71 DT1

 

This one is probably not bent, and this is a '73 DT3.

 

The pedal on my '72 is pressed/formed steel, the one on the DT3 is cast iron, it looks like. The DT3 is a first timer for me, so I'm not 100% sure if there was a change in pedal design in '72 or '73.

Make sure the arm on the brake drum is pointing down, often I see them pointing up after a rebuild and you'll have a tough tome getting things set up properly that way.

Don't forget the Tech Library link up above has links to free Service Manual downloads that will guide you to proper setup.

 

All, many thanks.. pedal is definitely bent... I started  the reforge process last night .. looking better already ... thanks for all your help guys