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First, lubes have changed from the 60's so reading original manuals still leaves some items open to interpretation. You didn't say what Series D17 you have so the answer differs a little if you have a Series I or II vs a Series III or IV on where you add some fluids. I have a Series IV. For engine oil, I run 10W-30, you could also run 15W-40 in the summer months if you need to change it that often. I wouldn't recommend 10W-40. For hydraulics on a Series I or II it's added on the right side of the torque tube. On a Series III & IV the hydraulic and power director compartments are combined. Run universal trans/hydraulic fluid in both those. Look for the AGCO/Allis 821XL spec. You fill the power director compartment using the dipstick with a hex head to the left of the gear shift. The transmission/differential is filled using the larger breather dipstick to the right of the gear shift. If you run your tractor hard like field tillage use 80W/90 EP GL-5 gear lube. If not, you can also use the same universial trans/hydraulic fluid. If this hasn't been changed in a while, drain, possibly flush with some diesel fuel & refill as condensation forms adding water to the case. Don't be surprised if you drain it and it looks like a brown milky sludge. I still run gear lube in mine. The final drives are filled with plugs in the bottom inside of the pans. Also use 80/90 gear lube there. Fill till it runs out the hole. If you have power steering, that is filled by removing the tall breather plug in front of the radiator/behind the grill. You can use either ATF fluid or universal trans/hydraulic fluid. This compartment also gets water in it easy and should be drained if not changed recently. Drain plug is underneath on the right side. I run ATF now but am switching to trans/hydraulic fluid here on the next change. HTH. Mike
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