What is this Oil leak?

Rkh · Feb 6, 2021

Oil is leaking out of small hole in my mf65 gas. Is this a rear main seal leak
where the little hole is underneath tranny? What parts do I need to change this?
What is involved with this overhaul? If it's the Rear main seal, is there something
else I should be doing while this is apart.

Rkh · Feb 6, 2021

Here's pictures

Dieseltech · Feb 6, 2021

It's either engine oil, trans oil, OR a little of each. If it's the rear crank seal, a split is needed, AND oil pan has to come down as the seal lower two bolts com in through the front of rear main cap.

Rkh · Feb 6, 2021

it is transmission oil

Keith Molden · Feb 6, 2021

Check your transmission oil to make sure it isn't overfull. If it is, it will leak out around the shaft.

FBH44 · Feb 6, 2021

Is that the hole where there's supposed to be a cotter pin hanging out to rattle around and keep the hole clear? My MF has one.

Rkh · Feb 6, 2021

Checked tranny oil-its right on full

lugnuts2030 · Feb 6, 2021

I have fixed many tractor seal leaks over the last 25 years by just adding Seal lube by NU Tech available on e-bay. I have a MF 1085 that was leaking oil from front engine seal and I order a 8 oz bottle of that stuff. Direction said I needed 2-3 bottles but one bottle fixed it and that was 25 years ago and it has not leaked since. I have used it in power steerings and hydraulics even with wet brakes and no problems just solutions. I don't sell the stuff but it sure has saved me a lot of time and expense. Its well woth a try. Wont fix a torn sealbut it will soften seals that have hardened on old equipment. I'm just trying to help others out!

Steve@Advance · Feb 6, 2021

How bad is it leaking?

Not uncommon for them to leak a little. A leaking rear seal can leave a big mess and have minimal effect on the engine oil consumption.

Be sure the engine oil is not overfull, as in overfilled or contaminated with gas.

It can also be the front transmission seal.

I have greatly slowed rear main seals by running the oil below the full mark. As long as you know the oil consumption history, running it low will not hurt it.

A leaking rear seal is often a symptom of more serious problems like loose main bearings and excess blow-by. A restricted crankcase breather will also increase crankcase pressure. Only replacing the seal may be a temporary fix or no improvement at all if the engine is getting tired.

If you do go in to repair it, while there it would be a good time to replace the front transmission seal. If it has a dual clutch it will have 2 seals.

Also look up top. A leaking valve cover gasket can sneak it's way down and appear to be a rear seal.

Rkh · Feb 7, 2021

Thanks for advice steve@advance, motor oil looks good, got a 8" area under transmission leak on floor-not a puddle. Valve cover looks good.

MarB · Feb 7, 2021

If the oil is clear ,, which looks to be the case in the picture ,, its transmission oil. If the oil is black ( same colour as engine oil ,, its the engine rear seal leaking..

John Deere D · Feb 7, 2021

I recently had to replace both OIL SEALS and bearings on the INPUT shaft, etc,etc, of a 1963 6 sped MF Transmission....NO multipower
...AS PER PICTURES..

Good Luck
Bob...

John Deere D · Feb 7, 2021

I should have mentioned.....I no longer dismantle the input drive with out removing the TOP Transmission cover....
Reason...
If I discover any problems, then the owner is contacted... they must make a call....to replace OIL SEALS on the input shaft...and NOT to eliminate internal problems...????????
A proper set of Pliers is a MUST

Bob..

What is this Oil leak?

Rkh

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Rkh

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Dieseltech

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Rkh

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Keith Molden

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FBH44

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Rkh

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lugnuts2030

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Steve@Advance

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Rkh

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MarB

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John Deere D

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John Deere D

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