Command 18 PTO Oil Seal Replacement
 

I'm about to have another Command 18 come into my possession, with the issue of it needing a rear oil seal replaced (the engine is in backwards, after all :biggrin2:). I know I have to remove the PTO to get to it, and I have to remove the old seal. I've read in many places that you can fit two seals in there in most Commands, but you have to be careful not to push the inside seal in too far or you can block off the oil return hole. Now bare in mind that I haven't gotten so far as to open it up yet so when I get there, I may look at it and go "duh". But seeing as I'm not that far into it yet, when I installed the new oil seals (I'm going to put 2 in), will it be obvious how far to push them in before blocking off the oil return hole? Also, should I put anything, RTV or otherwise, on the seals before installing them? This machine leaks only when it's off, not when it's running, so I'm thinking just the seals will be fine, but I want to make sure. Thanks guys :beerchug:

Jim

You can just clean off the old seal and then install 1 new seal against the old seal. Just push the new seal in so that it's flush with the face of the block. BTDT.

you really don't want to install seals back to back. the outer seal gets no lube at the seal lip and just burn up anyway , seen it done before. its a waste of time and money. besides if you have that hard of time keeping the seal in thee's other issues there

Don

The one I did was leaking at the seal lip so the outer seal was getting enough oil to lube it. I agree if that the seal lip needs oil or as you say it will burn up.

The 1863 that is used to mow my grandparents place was pouring oil. I just pushed a new one in on top of the old one. I know the correct thing to do is pull the old one out. But no side effects have occurred yet.

I'm figuring since I'm going to be in there anyway, I might as well just take the old out, and put a new one (or two) in. I did a little browsing and it looks like as long as I don't block off this hole, I'll be alright.

I think what I'll do is measure how far in-set the old seal is, and match the new one up depth wise as I install it. Unless anyone else has a better idea? :bigthink:

Use one seal. Why do you think you need two?
I wouldn't put the new one in the same as the old. Seals wear a groove in the crank. Put it shallower, or deeper. That's probably why so many who change the seal still have a leak. They put it right where the old one was running. Can't seal unless it's smooth.

Yep!..............

Bcdsfcret
 

I would not use any RTV. Most people use too much of it and the RTV can plug up the oil pump screen.
Brian

or any other passage like that oil hole you don't want to block off