Hi, Chris, I am new here and have a couple of questions about our 1550 we are working on if you don't mind. 1) we are replacing the exhaust manifold the tractor(gas) and the new gasket between the intake and exhaust is different than the old one. The old one closes off about 2/3 of area and the new one does not. Will this make any difference in the heating of center runner? 2) In rebuilding the brakes does the balls in the actuating mechanism need to be lubed and if so what is recommended? My dad bought this tractor used and we do not have and books for it. Thanks in advance  for any  help/info if you can provide. JOHN