1973 10hp 8spd Revival/Budget Resto

[Retired Wrencher 6,364]

On 2/4/2026 at 7:25 PM, Chris689 said:

I’m also looking for a little insight into the PTO bearings. Should I replace them before they possibly go bad? Due to how long it’s been sitting I’m considering replacing the bearings and the seal is junk anyway. Also the grease is old so I pulled the PTO to clean everything out anyway because it spins even when not engaged. The shaft is kinda sticky from the old grease which I believe is causing this. I will be installing a PTO brake and the bracket required to mount the brake since I’m assuming 1973 didn’t have them at all as mine doesn’t have one. All in all, should I just pull everything, clean and re-grease, replace the seal and re-install or just replace the bearings and seal and obviously clean things up.  

Try grease them first. Use a brush put plenty of grease all over the bearings. Turn by hand and reapply more grease. I did a few times and it worked for me.

[Racinbob 12,614]

It's a bit late now but I just plug the PTO housing from the outer side and fill it with degreaser. I'll leave it sit a day or 3 rotating the bearings now and then. A good flushing, repacking, seals and you're good to go. 

 

[Chris689 80]

So I pulled the PTO off my 77 C120 last night to see if it would work on the 73. The 73 has a 6” PTO and the 77 has a 6 3/4”, didn’t know if it would work. When I pulled the PTO from the 77 I found a bolt with a spring on the end of the crank to help with disengagement and drive the PTO into the brake. Is this a factory setup or would this be a mod someone did? I can’t find it referenced in any parts manual. Just curious.

[Chris689 80]

13 minutes ago, Racinbob said:

A good flushing, repacking, seals and you're good to go.

Yeah I’m regretting my life choices at this point lol. 

[Racinbob 12,614]

1 hour ago, Chris689 said:

So I pulled the PTO off my 77 C120 last night to see if it would work on the 73. The 73 has a 6” PTO and the 77 has a 6 3/4”, didn’t know if it would work. When I pulled the PTO from the 77 I found a bolt with a spring on the end of the crank to help with disengagement and drive the PTO into the brake. Is this a factory setup or would this be a mod someone did? I can’t find it referenced in any parts manual. Just curious.

 

That's a factory setup. Shortly after that they added another retaining ring and eliminated the spring and a couple other parts. I don't know exactly when. I think they eliminated all 5 of those parts on the end of the crankshaft (103, 104x2, 106 & 107)