New FDs don't come with bent over taps.
Taps are NO longer available .
Lock taps are one time use, not wise to re use them
Final Drive Issues- Chapter 2
Forum rules
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.
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.
- Msblu79
- Hero of the Soviet Union - 2019
- Posts: 1936
- Joined: Mon Sep 13, 2010 8:00 pm
- Location: Invading Upstate NewYorkastan
Re: Final Drive Issues- Chapter 2
From what I have seen and experienced the usual failure mode in the FD is the bolt heads shearing off and leaving the threaded stud loctited in the ring gear. Torquing the 10.9 bolts to 24 lb./ft. will stretch and preload the shank and prevent it from moving and developing a fracture under the bolt head.
2010 Black Patrol 90,000km's
Modtop airbox, 2013 branch pipes, Perch rings, Yamaha petcock, Drilled slides, Gossie needles, 145 mains, 45 pilots, insulated manifolds, Modtop pushrods, Dual FMF exhaust, PA Multi-spark system w/ VOES, Spin on filter conversion, 33mpg, Royal Purple fluids.
Modtop airbox, 2013 branch pipes, Perch rings, Yamaha petcock, Drilled slides, Gossie needles, 145 mains, 45 pilots, insulated manifolds, Modtop pushrods, Dual FMF exhaust, PA Multi-spark system w/ VOES, Spin on filter conversion, 33mpg, Royal Purple fluids.
Re: Final Drive Issues- Chapter 2
Yes, from experience. I would not make a statement like that without direct experience. I have seen this on 2 other bikes as well.VWK75S wrote: From experience?
John
Bolts stretch and loosen.
On 1WD models, (if you check the fluid level often) you will notice the fluid has become silvery. If you attend to the issue at that moment, you will find the fold-over tabs have failed and the bolt heads are rubbing against the outer case. The aluminum particles make the final drive fluid silvery.
Attending to this early, avoids catastrophe.
BTW - these tabs are still available from overseas suppliers.

Re: Final Drive Issues- Chapter 2
+1.Msblu79 wrote:From what I have seen and experienced the usual failure mode in the FD is the bolt heads shearing off and leaving the threaded stud loctited in the ring gear. Torquing the 10.9 bolts to 24 lb./ft. will stretch and preload the shank and prevent it from moving and developing a fracture under the bolt head.
Never saw bolts back out, only heads shear off
- VWK75S
- Hero of the Soviet Union - 2019
- Posts: 4725
- Joined: Fri Jan 01, 2010 9:25 am
- Location: Sebago Lake Maine
Re: Final Drive Issues- Chapter 2
Good to know that makes the advice more valuable.propwash wrote:Yes, from experience. I would not make a statement like that without direct experience.
Thanks, John
The Ural's made Maine a much bigger state.
2009 GearUp 145,000kms
2007 Retro 25,000kms
1991 VWK75S 110,000miles
2009 GearUp 145,000kms
2007 Retro 25,000kms
1991 VWK75S 110,000miles