Thanks for all your comments. The E R instructions are to insert the bushings into the trailing arm by hand aided by soap - easy to do. Then insert the pilot tool (3 inch long bar same diameter as pivot shaft with coaxial hole with tapered entry) into one of the inserted bushings to receive the incoming pivot shaft threaded end to guide the shaft into the bushing that is being pushed in from the opposite end. Inserting the pilot tool aided with soap, requires a bar clamp. This was straight forward.
Final step is to press the pivot shaft with soap solution help, through the bushing opposite to the inserted pilot tool bushing and towards it, in my case, with my new bar clamp. All good until the bar is in about 2 inches, when it begins to draw one side of the bushing into the trailing arm hole. The problem appears to be: the action of the squeezed tight fitting rubber bushing around the pivot shaft scrapes the liquid soap lubricant off the shaft as it slides in, and then the friction draws the rubber bushing into the trailing arm pivot hole.
I am looking for some glycerine as my next step.