1. Disconnect the "C" shaped (connecting) lever (3780) from the Toggle Lever (3800).
2. With the (outside)Emergency Brake Lever Arm (3830/3840) removed, put the spring (3870 R or L) in place properly oriented.
3. Install the Emergency Brake Lever Arm. Make sure the spring is properly orientated.
4 Pull the Toggle Lever (overcoming the spring) into place with the Connecting Lever and install the pin , (3790) and cotter key.
Part numbers are from Bratton's catalog 2011 (pg 16/17)
I know... sounds too easy. But we all make the same mistake of assembling the entire emergency brake assembly, brake rod and all, and then try to pull that @#!@@@ spring into place. No, I'm no genius, I found this out by accident.
Have fun.