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MF 245,0W40 syn oil, and leaks

M

MF in Canada

Member
Hi folks,

I have been using 0W40 synthetic Mobil Delvac oil in my MF245 diesel for a few years. I did this to aid in cold starting.

Slowly the tractor has been leaking more oil. There seem to be two leaks: the front main bearing (bottom pulley at front of engine) and also out the rear main bearing. As far as the rear leak - I actually see the oil dripping from where the cotter pin hangs out below the clutch housing, and the hydraulic oil level is not lowering like the engine oil is.

Questions:

1) Are these leaks because of the synthetic 0W40 oil?
2) If I switch back to regular oil, will the leaks reduce?

I am hoping to avoid replacing the bearings and seals, of course.

Thanks much,
Eric
 
answers to #1 and #2 is no, and no. cold weather is usually when a leak will occur due to wear and seal stiffness. once it is leaking it will not stop other than warm weather might slow it down. its replace time. its a seal and oil viscosity makes no difference .
 
Add Seal-Lube by Nu-Tech to the oil, That should take care of your leaks. I added it to my 1085 25 years ago one time to stop front engine seal leak and to this day no leak. I use synthetic blend oil. additive will bring back new life to the seals.
 
well i am referring to new seals and shafts, and viscosity dont matter. he is talking both engine oils so i hardly think you will see any difference in leakage from one oil to the other. once you have a seal leak there is no fixing it and i dont care what additive is added. if anything the warm weather will slow down oil seal leaks.
 
The truth is that I have had more than 1 tractor where Power steering wheel turned and oil would slip past the seals in warm weather. My friends JD loader tractor did this and got so bad he couldn't steer any more. I gave him a bottle of this seal softener and he added it to the resivore. He then started tractor worked it thru the system and warmed everything up and steering came back. That was 10 years ago. I don't sell the stuff. I just want to help people out. Many tear downs for seal replacement are unnessary. Just as simple as pouring correct thing in and letting it go to work. It won't fix a tore seal but 90% of the time seal is just aged and can be renewed.
 
I agree with David, that is a very thin oil and Im not sure that it is correct for that engine. I dont have an owners manual, but I found one reference that said this motor should use 10w30 or 15w40. Either of those grade oils in a synthetic formulation will give very good performance in cold weather.

Ive had engines that use / leak oil get better (use less oil) with thicker oils. While I dont have experience with products that improve seals, it might be worth a try for a few dollars.
 
Thank you all,

I will certainly switch to 15W40. I use a block heater anyway.

And I will get some Seal-Lube, and add that if changing the oil viscosity doesn't stop the leak.

And if that fails, I will do the whole teardown and replace seals...

I really appreciate you all commenting on my question.

Thanks,
Eric
 
Yes and Yes if you did not have significant leaks prior. I agree with using a thicker oil and I too use a heater. Mine is in the lower hose.
 
I have dexta tractor that leaked from rear seal using
15w/40 , I topped it up one day with Fuchs HDX30 which
I use in old sawbench engine and no more leaks but I don't know how it would work in. cold climate
 
I ruined an Oliver Diesel engine using Esso polar plus 0w-40 several years ago. Started using oil heavy and was even worse to start than it was normally. Mechanic figured that the high detergent content dissolved much of the heavy sludges and gunk that an olde engine relies upon for lubrication. I think its possible that the incorrect oil could lead to some premature oil leakage but more likely you would see it in engine performance first. STP actually may help to reapply some of the components that may have been stripped away buy the synthetic oil. It was too late for me as I lost so much compression the engine stopped firing. Been yard art for 20 years now.
 
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