BMW Luxury Touring Community banner

1 - 20 of 23 Posts

·
Registered
Joined
·
10 Posts
Discussion Starter #1
I have removed my final drive - bearing was toast - I then found the u-joint was a little "tight". I have been looking here and the advice is to replace the whole shaft. I called dealer today and was given the sticker shock of $980 + tax etc..:mad: Really so can you send it out and have u joint's replaced or do you need to replace the whole shaft?:confused:
Your help and comments would be helpful. Bike has 160K on her and I am second owner - bought last year and enjoy riding not fixing all summer:(
 

·
Enjoy The Ride
Joined
·
3,989 Posts
The u-joints can not be replaced & a little tightness is normal. They also have a slight notchy feel to the u-joint usually when I check them. Max BMW shows the shaft at $853.
 

·
Registered
Joined
·
10 Posts
Discussion Starter #4
so how do i know how much "tightness" is acceptable? If i don't have to replace drive shaft will save me lots of hassle
 

·
Wrencher Extraordinaire
2005 K1200LT
Joined
·
14,253 Posts
Tight is good as long it is linear through the range of motion. When they get loose and notchy it is an issue. Mine at 80 K was getting a bit loose and had a tight spot so I pick up a spare off this site.
 

·
Registered
Joined
·
10 Posts
Discussion Starter #6
I have run into a problem taking the swing arm journal - the left side has rounded. Is it a left hand thread? I have removed the outer hex and 12mm on left and 30mm on right. Right bearing journal was johnson bar and pipe handle to get free. If I'm really stuck will get nut welded on to remove -but must make sure turning correct way.
Thanks
 

·
Registered
Joined
·
3,226 Posts
both "normal" thread... lefty-loosey... did them a week ago and I was wondering the same thing.
 

·
Premium Member
Joined
·
7,622 Posts
Here is part# 26 11 2 332 996
mine is 6 degrees out of phase - with u-joints that are done:(
It is time to make the call to dealer and buy new one I think
6 degrees out of phase sounds about right. What is wrong with your u-joints?
 

·
Registered
Joined
·
10 Posts
Discussion Starter #12
6 degrees out of phase sounds about right. What is wrong with your u-joints?
Shouldn't the drive shaft go to phase? not 6 degrees out?:confused: My mechanic friend( truck - car) not bmw bike - has looked at and taken to machine shop to get u-joints replaced. (yes don't do it i know) u-joint is tight at the end of it's usual range. You can feel the difference as you go through range of motion with u-joint.
 

·
Premium Member
Joined
·
7,622 Posts
Shouldn't the drive shaft go to phase? not 6 degrees out?:confused: My mechanic friend( truck - car) not bmw bike - has looked at and taken to machine shop to get u-joints replaced. (yes don't do it i know) u-joint is tight at the end of it's usual range. You can feel the difference as you go through range of motion with u-joint.
LT driveshaft has a rubber damper integral to the shaft. This allows some rotation under load (torque). The clever BMW engineers allowed for this and the front u-joint trails the rear by a few degrees statically so that it will be in phase under a typical cruising load.
 

·
Registered
Joined
·
10 Posts
Discussion Starter #14
Sweet, and thanks. I was there picking up parts and had chance to talk with service mgr. I think u-joints are ok - His recommendation was to not replace shaft but pinion bering at final drive- swing arm. "You have it all apart - we always replace when we do" being holder if not damaged/ scored will be fine.
 

·
Wrencher Extraordinaire
2005 K1200LT
Joined
·
14,253 Posts
Pinion bearing is $138 plus you have to re-shim the pinion for gear contact then re shim the taper bearing for backlash and finally re-shim the big bearing for preload. Sounds like a lot of labor to me.
 

·
Registered
Joined
·
10 Posts
Discussion Starter #16 (Edited)
Hey John, the pinion needle bearing i thought / think i bought are between the final drive and the swing arm. The final drive is off being rebuilt by Bruno's as per Dave's recommendation ( U-tube video). I have had just about every issue - exhaust studs came out, bearing journal's mounting the swing arm were stuck and replaced as damaged in removal. Would like to think I'm almost ready to put together soon as drive returns. Does needle bearing require backlash etc?
Oh please I hope not LOL

Andrew
 

·
Wrencher Extraordinaire
2005 K1200LT
Joined
·
14,253 Posts
If they meant the pivot bearings where the drive mounts to the swing arm no issues. The pinion bearing is the one on the shaft of the final drive where the drive shaft connects. That one is a bear. The pivots do get a slight preload when you install the drive but it is a no brainer.
 

·
Miles of Smiles
Joined
·
1,054 Posts
LT driveshaft has a rubber damper integral to the shaft. This allows some rotation under load (torque). The clever BMW engineers allowed for this and the front u-joint trails the rear by a few degrees statically so that it will be in phase under a typical cruising load.
Ahh, so that's why the intensional misalignment.
 

Attachments

·
Premium Member
Joined
·
7,622 Posts
Ahh, so that's why the intensional misalignment.
I am pretty sure that is the reason. Someone, I want to say Tom Cutter, did a calculation on the approximate torque required to move an LT down the road at 55-60 MPH. He then put the rear of the shaft in a vise and applied that much torque to the front either a torque wrench. The u-joints came into almost perfect alignment.

Some of those German engineers are really clever. The others get to design trunk latches, fuel quick disconnects and K1600 oil drain systems.

:histerica
 
1 - 20 of 23 Posts
Top