Engine oil leak

Michigankubota

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Equipment
B2650 Loader,LX 2980-64 Blower ,60”MMM , Land Pride 60”Box Blade.
Oct 17, 2018
246
11
18
Bessemer, Western U.P.
My 2650 developed a oil leak last May at around 50-60 hours. I’ve cleaned it up and it comes back after about an hour of run time. I brought it in a week ago. Anyone have this oil leak like this? The oil filter is not the issue. A friend has the same tractor with more hours with the same leak but never brought it in.
I believe it’s the oil pan.
 

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Roadworthy

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L2501 HST
Aug 17, 2019
1,649
525
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Benton City, WA
You could try tightening your oil pan bolts. They don't have to be real tight but they should be the same tightness. Use a torque wrench for the operation. The Kubota specs should state the proper torque.
 
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Michigankubota

Member

Equipment
B2650 Loader,LX 2980-64 Blower ,60”MMM , Land Pride 60”Box Blade.
Oct 17, 2018
246
11
18
Bessemer, Western U.P.
Stopped by the dealer today to see if they looked at my tractor yet. After almost 3 weeks they said I’m the next one in line.
They had 2 used tractors like mine for sale with the same leak. That’s the 3rd one not including mine that leaks oil from the oil pan area that I’ve seen..
 
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Roadworthy

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L2501 HST
Aug 17, 2019
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Benton City, WA
You could demand a warranty fix. From the pictures it appears to be a stamped steel pan so they could have gotten a bad run of them. At the next oil change you could pull the pan for a close inspection paying close attention to whether the top surface it flat and true. It's also possible a new oil pan gasket would solve the problem. You could add a very thin bead of RTV.
 
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armylifer

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I have seen oil leaks like this develop due to the engine not being run for enough time to thoroughly warm up the oil. The pan gaskets don't get hot enough to seal properly. This was most common back when cork gaskets were used. The problem can still exhibit on newer engines for the same reason. My advise is to run the tractor for an extended period of time to get the engine operating at full normal temperature to ensure that the gaskets seal.
 

Michigankubota

Member

Equipment
B2650 Loader,LX 2980-64 Blower ,60”MMM , Land Pride 60”Box Blade.
Oct 17, 2018
246
11
18
Bessemer, Western U.P.
I have seen oil leaks like this develop due to the engine not being run for enough time to thoroughly warm up the oil. The pan gaskets don't get hot enough to seal properly. This was most common back when cork gaskets were used. The problem can still exhibit on newer engines for the same reason. My advise is to run the tractor for an extended period of time to get the engine operating at full normal temperature to ensure that the gaskets seal.
The oil pan is sealed Using RVT. The front engine case does use some type of gasket.
 

Michigankubota

Member

Equipment
B2650 Loader,LX 2980-64 Blower ,60”MMM , Land Pride 60”Box Blade.
Oct 17, 2018
246
11
18
Bessemer, Western U.P.
You could demand a warranty fix. From the pictures it appears to be a stamped steel pan so they could have gotten a bad run of them. At the next oil change you could pull the pan for a close inspection paying close attention to whether the top surface it flat and true. It's also possible a new oil pan gasket would solve the problem. You could add a very thin bead of RTV.
It’s in for the repair now. they've had the tractor going on 4 weeks next Monday. The front of the tractor needs to be disassembled somewhat to remove the pan. That’s a good point on the stamping of the pans.
 

SidecarFlip

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M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
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Kubota don't use 'Blue Glue' (RTV) on anything, they use 'Grey Glue' (3 Bond), which actually is better. Not sure you pan has a gasket. Kubota substitutes 3 Bond for gaskets in many places. Sounds to me like the pan needs resealed.
 
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Michigankubota

Member

Equipment
B2650 Loader,LX 2980-64 Blower ,60”MMM , Land Pride 60”Box Blade.
Oct 17, 2018
246
11
18
Bessemer, Western U.P.
Kubota don't use 'Blue Glue' (RTV) on anything, they use 'Grey Glue' (3 Bond), which actually is better. Not sure you pan has a gasket. Kubota substitutes 3 Bond for gaskets in many places. Sounds to me like the pan needs resealed.
You are correct, it’s Grey or ultra Grey sealant.
 

Michigankubota

Member

Equipment
B2650 Loader,LX 2980-64 Blower ,60”MMM , Land Pride 60”Box Blade.
Oct 17, 2018
246
11
18
Bessemer, Western U.P.
After 6.5 weeks at the dealer and a new oil pan, I still have the same oil leak. I mentioned to the service writer it seemed the oil Was coming from the front engine cover. A $25 gasket.
Now they have to tear the tractor apart again. This time there lending me a free loaner with a blower while mine is getting fixed.
 
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Michigankubota

Member

Equipment
B2650 Loader,LX 2980-64 Blower ,60”MMM , Land Pride 60”Box Blade.
Oct 17, 2018
246
11
18
Bessemer, Western U.P.
Dropped my tractor off today to fix the oil leak again. The dealer gave me another B2650 to use while my repairs are being done. The unit I have now has 367 hrs and has the same engine leak. Is this normal on these B series tractors?
 

sheepfarmer

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Nov 14, 2014
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I have a B2650 so tend to read posts about them and don’t recall any others. Anyone else?
 
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whitetiger

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Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
Nov 20, 2011
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Kansas City, KS
Dropped my tractor off today to fix the oil leak again. The dealer gave me another B2650 to use while my repairs are being done. The unit I have now has 367 hrs and has the same engine leak. Is this normal on these B series tractors?
The only engine oil leaks I ever see on a B series are the engine oil pressure sender and the tach drive gasket. I service on average 1 or more a week.
 
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