Dr Allis re D19 3rd gear

(quoted from post at 05:28:13 10/25/19) Finally with a retired AC mechanic took the shift cover off the D19. It definitely needs the third gear, input shaft, and 3/4 gear collar replaced. My question is what else should be replaced while the tractor is torn apart? I have the parts manual and the above items are nos 20, 22, and 25 on page 145 of the manual. This website has those 3 parts for $550 vs Agco's $1900. Are there other aftermarket suppliers that would have these parts and also anything else you would suggest I replace? I assume bearings or seals might be available at Motion Industries?

All seals and Orings for sure. Some gaskets can be cleaned with brake kleen and re-use with a thin film of RTV sealer spread on them to save some money. Be sure to replace the Oring on the PTO shifter lever and the two Orings on the hand clutch shaft while apart. Ten shaft seals (input shaft...2 lower PTO shaft seals.....rear PTO shaft seal & Oring......two inner bull pinion seals....two outer bull pinion shaft seals....two axle seals. I would always change both lower countershaft bearings and cups and the input shaft ball bearing. Any other bearings are up to you, and where do you draw the line?? The tractor is 55 years old. How many more years will it be plowing and discing ?? There are three main shaft bushings inside of 1st-2nd and 3rd gears. DO NOT lose the little pins inside those bushings !!! Use grease or RTV to hold them in place when reassembling. Remember on the shift cover the two special dowel bolts go in the left front and right rear corners. Aftermarket parts should be OK and be sure to price bearings and seals from AGCO. You might be surprised that they could actually be less than other vendors. Measure your countershaft snap ring thickness and get some new ones a size or three thicker. You want to have to drive the snap ring in place and make the countershaft turn with some drag to it.

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