Hi, I just aquired an old 135, it sat for at least 18 years, and amazingly, it fired off and ran on the very first crank! Short of barring it over and moving all the shifters and handles, we didn't do a thing to it. The only thing that doesn't work is the 3 point hitch. The controls weren't seized, and they all move fairly smoothly. Is there anything that could have/usually does freeze up on the inside that should be checked? Thanks.