driveshaft splines

Woe unto you that bought the first model year of a major remake, perhaps this section can help address any 2014 and later model Ural "imperfections". Here's a special section for folks with the latest rigs to discuss 2014 and later model-related topics such fuel injection, 3-wheel disc brakes, hydraulic steering dampers, spin-on oil filters and other anomalies that don't belong on true Russsian motorcycle ;-P We've gone from using big hammers and greasy wrenches to needing computers and Ouija boards in order to fix our rigs.
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Please keep this section specific to issues pertaining to 2014 and later models such as fuel injection, sidecar and rear disc brakes and so forth. Ask general or non-2014 and later specific questions in the main Hammerin' & Wrenchin' section.
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2017 CT
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driveshaft splines

Post by 2017 CT » Mon Apr 08, 2019 1:24 pm

How do I separate the final drive from the driveshaft to grease the splines? I got the tire off but could not figure how to remove final drive (didn't want to force anything

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Re: driveshaft splines

Post by Trumpetwasher » Mon Apr 08, 2019 1:46 pm

Best advice from a grizzled old Ural mechanic was not to worry about splines or u-joint on a one-wheel-drive until you change the pusher tire.
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Re: driveshaft splines

Post by Albuquralque » Mon Apr 08, 2019 1:52 pm

Just a couple of minor differences between 2wd and 1wd final drive.

You don't have to be concerned with the 2wd sidecar driveshaft, nor the 2wd engagement linkage.

And the 1wd final drive only has two hold down studs / nuts.




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Re: driveshaft splines

Post by Lofty » Mon Apr 08, 2019 4:08 pm

Another bookmarked video. Thanks, Darrell.
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Re: driveshaft splines

Post by Mr Wazzock » Mon Apr 08, 2019 5:12 pm

More than a couple of minor differences, the swingarm is different design for a start.
2017 CT wrote:
Mon Apr 08, 2019 1:24 pm
How do I separate the final drive from the driveshaft ?
For CT ?
Undo the two nuts ether side of wheel spindle hole, then it should virtually fall out.

:D

(This assumes you have taken rear wheel out first of course. Top tip: for that, take the brake caliper off first, almost impossible otherwise)

Tip #2 [important!] : when putting the FD back on, leave the two fixing nuts loose, that is to say not quite fully done up, then put the spindle thru, then tighten the nuts. This ensures the spindle hole in swingarm properly lines up with the final drive spindle hole, if not, wheel can end up skewed so tire rubs on the driveshaft spline rubber cover, guess how I know! Clue - if you need to massively wallop the spindle with big hammer to make it go back in, something's wrong i.e. the FD and swingarm holes are not aligned. Again guess how I know ... Image

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Re: driveshaft splines

Post by Mr Wazzock » Mon Apr 08, 2019 5:16 pm

Ah forgot - if you do seperate the driveshaft, get the UJ/donut phasing right when the splined joint goes back together.
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Re: driveshaft splines

Post by 2017 CT » Mon Apr 08, 2019 8:19 pm

Mr Wazzock wrote:
Mon Apr 08, 2019 5:12 pm
More than a couple of minor differences, the swingarm is different design for a start.
2017 CT wrote:
Mon Apr 08, 2019 1:24 pm
How do I separate the final drive from the driveshaft ?
For CT ?
Undo the two nuts ether side of wheel spindle hole, then it should virtually fall out.

:D

(This assumes you have taken rear wheel out first of course. Top tip: for that, take the brake caliper off first, almost impossible otherwise)

Tip #2 [important!] : when putting the FD back on, leave the two fixing nuts loose, that is to say not quite fully done up, then put the spindle thru, then tighten the nuts. This ensures the spindle hole in swingarm properly lines up with the final drive spindle hole, if not, wheel can end up skewed so tire rubs on the driveshaft spline rubber cover, guess how I know! Clue - if you need to massively wallop the spindle with big hammer to make it go back in, something's wrong i.e. the FD and swingarm holes are not aligned. Again guess how I know ... Image

HTH
I had the wheel off and the two nuts off the final drive and It would not budge. I tapped it a bit but was afraid to tap too hard, I could not see what was holding it. I have had FD's off bikes before, just could not move this one ... any advice is welcome
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Re: driveshaft splines

Post by hotflash44 » Tue Apr 09, 2019 9:12 am

2017 CT, should have movement toward the left when you pull on the drive shaft at the u-joint. like in Darrell's video. only other area it could hang up is the studs on the FD /swing arm. maybe very careful with a plastic dead blow hammer. good luck :cheers:
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Re: driveshaft splines

Post by Mr Wazzock » Tue Apr 09, 2019 12:49 pm

Nope, don't get it either. Unless what he said, studs are tight. :o
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Re: driveshaft splines

Post by 2017 CT » Tue Apr 09, 2019 8:10 pm

i guess i'll dig out my orange dead blow hammer and give it a go
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Re: driveshaft splines

Post by Penrod » Tue Apr 09, 2019 9:39 pm

Go to YouTube and watch Donut Removal May 2018. It might provide a few hints. Or maybe not, since the final drive on the cT comes off easily.
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Re: driveshaft splines

Post by 2017 CT » Wed Apr 10, 2019 7:55 am

Penrod wrote:
Tue Apr 09, 2019 9:39 pm
Go to YouTube and watch Donut Removal May 2018. It might provide a few hints. Or maybe not, since the final drive on the cT comes off easily.
After watching that I think the only explanation can be that the studs are hanging up in the frame. I'll have a look
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Re: driveshaft splines

Post by Mr Wazzock » Wed Apr 10, 2019 6:55 pm

Yep mine came out easy too. So not sure what's going on there.
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Re: driveshaft splines

Post by Bendog02760 » Wed Apr 10, 2019 7:07 pm

If I can help CT let me know. I’m south of Boston but heading to UralNE this weekend. I’ve done my 2wd GU a couple of times now.
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Re: driveshaft splines

Post by 2017 CT » Wed Apr 10, 2019 8:49 pm

Bendog02760 wrote:
Wed Apr 10, 2019 7:07 pm
If I can help CT let me know. I’m south of Boston but heading to UralNE this weekend. I’ve done my 2wd GU a couple of times now.
I appreciate the offer. I'll get it out .... not new to working on bikes, I just think it is hung up on the studs. If it's nice on the weekend I may ride it instead of taking it apart again
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