uncleb writes, "I've had the drum off eight times and everything seems ok."
You must look like Charles Atlas by now. Removing those big tires off a truck your size is a darn good workout. I have 20 inch split rims on my 3 ton. I swear a tire and rim weighs over a hundred pounds, about as much as my wife's backside weighs.
Not much goes wrong on those big brakes, really stout system. Well made and seem to have better stopping power than small cars. Shoe frames on mine are cast aluminum, huge and thick. Linings are 1/2 inch thick, about 4 inches wide and 14 inches long each. Dual wheel cylinder system for each wheel. Had a hard time finding 1 1/2 inch pistons and seals but those are out there. Seals came out of Argentina, listed for Diamond T and Reo trucks but are the same as GMC.
Brake adjustment is with a large allen head wrench poked through a deep hole backside of the hub plate. I think your two ton is a bit different.
Remember to adjust all four brakes equally before finishing up. Let me know how this works out for you, I am interested to learn if this solves your problem. Hope so, can only get worse if this is not simply a brake adjustment issue.
Billyray
