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Hydros are nice but choosing between a gas 656 hydro and a diesel 966 gear drive I would buy that 966 in a heartbeat. I have both and the 966 is better in almost every way. just my 2 cents.

I’ve had belts make that noise before. Try spraying a little WD40 on one belt at a time while it’s running and see if the noise stops.

I’ve been dealing with this problem for many decades. Nothing discourages then from my experience. you either mouse proof the shed or just sell everything before they destroy it. I know that’s a gloomy outlook but that’s been my experience. good luck.

Thanks for sharing that. Learn all you can from them old timers they are a wealth of good advice.

Here’s the steps to put it back together starting from where they installed that throttle shaft. the whole thing looks pretty complicated but maybe once you get started it might not be too bad. I didn’t include all the pages dealing with the actual pump as I figured you are probably not going to be taking that apart. let me know if you need anything else.

Here’s what I have on disassembly to get to that shaft.

Sorry for the delay. Not sure why this didn’t send the first time. Pretty strait forward. Roll the engine over by hand until your flywheel and injection pump marks line up like the first picture. Take the front pump gear inspection plate off and then remove the three bolts off the timing gear. Now you can just take the pump mounting bolts out and pull the pump off. The holes in the gear are slotted to be able to adjust the timing. let me know if you need any more pictures from the RD service manual.

Before crowbars were invented crows usually just drank alone. 😬

I’ve not done the swap you are trying but I have a 1972 loadstar with a DT466 but mine has the tilt fiberglass hood so I’m not much help.

I heard that 4/3 of the population can’t do fractions.

I have that tractor supply solvent in my parts washer. works good

I can’t help with parts availability but thought these breakdowns from my factory service manual might help.

I just bolted a square steel plate on my M Suspension and then bolted a seat similar to your picture to that plate. Million times better than those worthless pan seats in my opinion.

My Dad and grandpa bought two matching 1066’s in 1974. Got delivered to the farm from the factory and then the dealer did the prep on them in our shop. I have my dads and my cousin has my grandpas. both have been on the same farms since new. added the extra IH decals to dads doors to tell them apart