Super C - PTO Lubrication How ?

dpski · Oct 30, 2009

Just drained all the gear oil from the tranny on my SC, also drained the small reservoir at the PTO / belt pully assembly. The owners manual says oil is provided to the PTO via the tranny and the plug on top of the PTO is only an inspection hole. O.k., but in looking at the tranny case the fill level indicator plug on the side of the trans case is below the lowest point of the PTO / belt pulley gear box case. So just how does the gear oil get from the transmission case up to the PTO gear box? Having never rebuilt a C or SC tranny is there some sort of gear driven pump in there or is it just supposed to splash it"s way up there?

Should I put a small amount of gear oil in the PTO gear box or nothing and let the tranny take care of it?

Thanks

Janicholson · Oct 30, 2009

The internal path of the oil on the gears, and drain back from that flow, is captured by the PTO gearbox to fill it in use. I would pour in a pint of the total gear lube through that top hole, Excess will just flow back inside the dif. JimN

Haas · Oct 30, 2009

The gears in the transmission sling the oil up into a channel in the side of the housing. It flows by gravity to the bearings and also back into the PTO gear box. Excess oil flows back to the transmission. All the old IH tractors use this system.

ScottyHOMeY · Oct 30, 2009

The others explained the slinger gear getting the oil up there.

There is a little pocket cast into the bottom of the PTO that keeps a little oil there for startup -- that's why it has a separate drain plug, to get any fouled oil out of there. Just as a precaution, once you've drained it, it's good practice to add the pint or two through the inspection plug at the top of the PTO just to get that little reservoir filled. The alternative is to leave it dry, and just not run the PTO for a few minutes after the first startup to give the slinger time to get some oil up to it.

mkirsch · Oct 30, 2009

When I changed the tranny lube in my SA, I completely forgot about the main fill hole and poured all the fresh oil in through the inspection hole on the PTO.

Smacked myself in the forehead when I realized my "mistake." Doesn't hurt anything, though. You can look down in and watch the oil work its way into the transmission.

ScottyHOMeY · Oct 30, 2009

LOL! At least you remembered to replace the drain plug before filling it back up. Right?

dpski · Oct 30, 2009

Ok thanks all for the replies.

gene bender · Oct 31, 2009

You can fill the pto if you like but when it runs there is an OIL SLINGER GEAR that moves the oil to a passage that runs to the pto assy and also a drain in the pto assy so it dont overflow. If you never use the pto no big deal. Now those passages can get plugged so the pto dont get its supply from the tranny. So fill the pto and dont worry about it unless you do use the pto.

Super C - PTO Lubrication How ?

dpski

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Janicholson

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Haas

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ScottyHOMeY

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mkirsch

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ScottyHOMeY

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dpski

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gene bender

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