I feel I am losing the plot. recently I purchased an early Hornby 0-6-0 chassis, the one with the motor over the rear axle. (for the R52 Jinty and the R251 3F).
Anyway, as it would not run through newish Peco Streamline code 100 points I decided to reprofile the wheel flanges and adjust the back to backs. I removed all except the wheels. Did the flanges by putting said chassis in a vice and hand filing the flanges to suit. Please dont all of you say WHAT! :) it worked, I then saw to the back to backs. All was good re running through said points. So I started to reassemble the chassis but didn't get very far. After putting the connecting rods back the chassis would only travel ¾ of a turn. I seem to recall this happening before but for the life of me I cannot think of the remedy. Now the chassis stands with just the left side rods on and it will run ok, but as soon as I put the other rods on, only ¾ of a turn then a dead stand. Please, what have I done wrong? I've compared it to an even earlier Tri-ang chassis which is a perfect runner (even with the solid wheels). Now this older chassis has the centre axle balance weights 180 degrees off from the the two outer axles, but this new chassis has all the balance weights in line. Please help......many thanks.