I had a 1982 336D for well over 10 yrs. Had an after mkt FEL on it, and it got worked hard. Did replace front spindle seals on it, and broke a front wheel due to loading it too heavy. Had a pair of front wheels made, using Bud outer rims, and 3/8 plate for centers. I did get it hot, from weed chaff as mentioned by yanmars, and when I washed the radiator fins out w/ garden hose, didn't do a good job, and the dust accumulated there turned to mud, and got hot again very quickly. Pulled the radiator and had it rblt, and it operated like nothing had ever happened. However, it smoked, and blew a little oil out the exhaust pipe. Plenty of power, sounded good etc., but figured it probably had steel rings (most of them do) and the o'heat had taken the temper out of them. Went tractor shopping, and the best deal I found was on a CCYanmar EX450. Nice tractor, but not nearly as well designed as the old 336 was. I advertised the 336 on CL, and ended up selling it almost immediately. I pointed out the smoke and oil blowing to the purchaser, and he didn't really care, said all he was gonna due was mow with it. I had installed a new muffler a few days prior to the heating incident.
I received a call from the new owner a few days later, informing me that he was box blading his driveway, and there was a large bang, and all kinds of oily stuff blew out the exhaust, and it didn't smoke anymore. Must have been something jammed it that new muffler. Wish I still had it, and would buy another one in a heartbeat. By the way - if the number designator after YM is 3 digits, it's a legitimate import. If it's 4 digits, it's a rice tractor.
