Hydraulic Fluid Dripping

Hi

I have a Harry Ferguson TO30 and noticed the transmission hydraulic fluid level was low. I went to the store and purchased some 90w fluid and filled the transmission. Next day the fluid had dripped onto the ground. Noticed there are two plugs underneath the tractor with one having what appears a small metal 'cottter pin' that moves in or out if you push on it. I was told that was to keep fluid from entering into the clutch.

Does this mean there is a gasket that is worn or does the plug need cleaning, etc.

Thanks

Robert

Tractors are not quite modern cars with zero leaks. There should be two cotter pins sticking out down below. As
the tractor move, the cotter pins rotate and keep the holes from plugging up. Those holes allow the leakage past
the seals to drain out. Question is, how much drip do you have? Enough to live with? or enough that your
thinking about tractor diapers? If you need a diaper, then it is time to split the machine and replace some
seals.

(quoted from post at 16:00:22 03/31/17) Tractors are not quite modern cars with zero leaks. There should be two cotter pins sticking out down below. As
the tractor move, the cotter pins rotate and keep the holes from plugging up. Those holes allow the leakage past
the seals to drain out. Question is, how much drip do you have? Enough to live with? or enough that your
thinking about tractor diapers? If you need a diaper, then it is time to split the machine and replace some
seals.

Click to expand...

Thanks for the reply. Actually a big diaper. The whole gallon that I filled the reservoir with drained out.

In case these are the parts required?

My TO35 also leaks from the trans, if I fill sump to the full mark it will leak some, I have learned to deal with the leak,

I never fill the sump to more than 1/2 way of the fluid level dip stick, center mark,

Also when you check the fluid level of the sump, be sure the lift arms are in down position, this insures all oil is out of the lift cylinder,
Also check level after tractor has set overnight to be sure all oil has flowed back to the sump

If you fill the sump to the full level on the dip stick with the arms up, then there will be extra oil when they are down,
Always pour the transmission oil in slowly, it has to flow to separate areas inside the sump,
Be sure to use GL-1 90 weight mineral oil in the transmission, lift system, not 90 weight regular gear oil

Be careful, Do not get oil on that clutch or you will be installing a new clutch

Thank you for the great information. I believe that I was overfilling the sump and the excess was just draining out. Where can I find the mineral oil? NAPA, etc.

Thanks again

Robert

yes napa carry's it,

if they do not have it in stock they can order it for you,
be very careful what you pour into the sump,
it must be the right oil

also many are now changing to 15w40 diesel oil, but it is detergent oil.

again only reason for the non detergent mineral oil years ago was to protect the bronze bearings in the transmission, some say the detergents and other chemicals in these new oils will attack the bronze bearings.

since most of the life of these old tractors is behind them, this may is a mute point.

however, the non detergent GL-1 mineral oil 90 weight will allow the dirt to settle to the bottom of the sump, so it will be taken out as the oil is changed.

detergent oil will allow the dirt to stay suspended in the oil to be taken out by an oil filter, that we do not have. using detergent oil means this dirt is pumped through the pump each cycle and not settled out.

in England they can buy 15w40 oil non detergent, I never found a source for it over here on this side of the pond.

at one time home depot advertised 10w30 non detergent oil for their lawn mowers, but for some reason took it off, it would have cost a fortune to use that oil to fill the sump.

any problem if the cotter pin is missing? Or important to replace F40 1958

(quoted from post at 10:10:25 05/18/17) any problem if the cotter pin is missing? Or important to replace F40 1958

Click to expand...

The cotter pin's there to keep the dirt daubers and wasps from building a nest there and plugging the hole. Stick a nail up in it a few times a season to be sure it's open & you'll be OK.
BillL

thanks that is exactly what i thought. BUt big value of the forum is to keep us from doing stupid stuff like penny wise pound foolish