Cold weather leak

Are ya having a problem with your rig? We'll try to help. Share your tech tips and experiences here. Dr. Billy Glaser, author of the "Unofficial 750 Ural Service Manual" site myural.com, is moderating this section.
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Here is the place for you to ask questions about or share your experiences about servicing or repairing your Ural or Dnepr. Please post topics concering modifications or accesories in the "Modifications and Acessories" section. Please post oil related questions in the "Oil Threads" section.
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Snakeoil
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Location: Upstate NY

Cold weather leak

Post by Snakeoil » Thu Mar 01, 2018 3:56 pm

A year ago, I reported a leak which appeared to be the rear main seal. Some input from others and some research indicated that I might have in advertently installed the rear seal too deeply into the bore and as such the lip does not fully engage the shank on the flywheel.

As the weather warmed up and I rode the rig that summer, I cleaned the shelf area and watched it. The lead did not return for the most part.

Yesterday we had temps in the high 40's and since the rains w@$#ed away the salt, I took the rig for a spin. Set a new milestone for me. I've never in my life been on a bike in February, at least on the road. Checking the bike when I got home revealed a wet shelf and a drop on the floor. My guess one of two things are happening, in addition to the more than likely deep placement of the seal. The colder weather is keeping something from expanding and since the seal is on the ragged edge of sealing, it leaks in this condition. The other thought is that the seal simply can no longer seal in the position it is in.

On the bright side, the bike ran like a raped ape. I cannot get over how quiet and smooth this engine is after the rebuilt done 2 years ago. It pulls really strong when you consider the HP rating and the weight of the rig. I had a ball yesterday to the point that it did not bother when I came over a hill and found the road paved in cow poop. The garage definitely had a new smell when I walked in this morning.
Regards,
Rob
Proud member of the Peanut Gallery
Certified Blatherer
2000 Ural Tourist
40 Pilots, 122 Mains
Before you say something stupid, always ask yourself, "What would Harpo say?".

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bgenest
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Re: Cold weather leak

Post by bgenest » Thu Mar 01, 2018 5:03 pm

Aaaaaaaaaaaaaaaahhhhhhhhhhhhhh, I love the smell of cow poop in the morning! Reminds me of my uncle's farm in NH.
2015 Burgundy Patrol "Stickee Monkee"

mtrdrms
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Re: Cold weather leak

Post by mtrdrms » Thu Mar 01, 2018 8:59 pm

Pics, Rob!
Did you rebuild the engine yourself? Is there a build thread?
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Snakeoil
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Location: Upstate NY

Re: Cold weather leak

Post by Snakeoil » Thu Mar 01, 2018 10:56 pm

Yes, there is a rebuild thread of sorts. It is in this section somewhere. I will see if I can find it...

Found it. http://www.sovietsteeds.com/forums/view ... ob%27s+650
Regards,
Rob
Proud member of the Peanut Gallery
Certified Blatherer
2000 Ural Tourist
40 Pilots, 122 Mains
Before you say something stupid, always ask yourself, "What would Harpo say?".

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