R26 gearbox removal.

Post Reply
User avatar
San Arthur
Posts: 501
Joined: Sun Apr 22, 2007 2:08 pm

R26 gearbox removal.

Post by San Arthur »

While taking Zenaida for a ride I start feeling some gear shift problems.

A few miles into my ride I got into a right hander and before the turn Zenaida died on me.
I those split seconds I thought: maybe an electrical issue with switch plate or key, a clogged fuel filter?
I remember seeing the generator light on, and after the turn I started pulling to the side of the road.

I don’t remember if I had the clutch engaged or tried to change gear but suddenly the rear tire skid and Zenaida stopped.

I tried engaging the clutch to push Zenaida, and nothing. I had to move the shifter hard, up and down, to find neutral and finally push it out of the very narrow road, I was too close to the curve.
The shifter will return to the center, this spring is ok.
I checked the clutch cable thinking maybe the lever was not moving the pushrod? but it looks ok.

I try to start Zenaida, but the kickstarter lever is froze in place.

Image Click_for_Video

If I push Zenaida I can see the cardan shaft turning, but bike wont move if in gear even with the clutch engaged.

Back home. Mea culpa...

With Zenaida is on the bench, I check thru the filling hole with my endoscope and the gearbox is dry.
Yes, I forgot to check the oil.

I will take this sad opportunity to document the removal of a R26 gear box, following the Barrington.
San Arthur in San Antonio, Texas
'58 R26 '76 R90S '94 R100GS/PD

User avatar
Micha
Posts: 560
Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

Re: R26 gearbox removal.

Post by Micha »

Sorry to hear, thanks in advance for your efforts to put your documentation, here for all of us.
Good luck.
Michael Steinmann
R51/3 1952
Engine Nr. 529466

User avatar
jwonder
Posts: 414
Joined: Wed Nov 23, 2016 7:50 pm
Location: Long Island, New York
Contact:

Re: R26 gearbox removal.

Post by jwonder »

If you need help let me know, I have done several rebuilds of these R26/R27 gearboxes. They are quite straightforward with a few "gotcha's" here and there.
James Wonder
Long Island, New York

User avatar
San Arthur
Posts: 501
Joined: Sun Apr 22, 2007 2:08 pm

Re: R26 gearbox removal.

Post by San Arthur »

This is how I removed the gear box. It may not be the correct way.

I open the Barrington and realized I have a lot of work to do to catch up with the chapter, basically removing all the rear of Zenaida.

Image

Removed the battery and drained the gasoline from the tank.
Image

Image

Is a gyn and tonic type of job. Make sure I have enough tonic for the Tanqueray.

Image

I removed the tank. I tape every surface I can, to protect the paint from scratches. Image

You may not need to remove the tank, but is easier than working around it. I store the hardware separately by component.
Image Image

I removed the carburetor. I placed the throttle cable and the speedometer cable in bags to protect the parts and prevent them from scratching the paint.

Image

[Image

Image

Put the carb and flange in a box.
Image

Remove the exhaust system and tape the intake and exhaust orifices.
Image

Image

I love my Barrington.

Image

Remove the rear wheel next.
Image

Image

Remove the air filter and battery box and disconnect the electric cables. Take lots of pictures from the cables position.

Image

Image

Next I removed the rear fender. Next time I think I will remove the rear fender first and then the box, I had a difficult time getting to all the bolts.

More taped on every surface to prevent scratches. I used clamps to compress the edge of the fender for easy removal and to prevent scratches.
Image
Image


Did I mentioned I taped more surfaces to prevent scratches.

Next I remove the rear brake rod.
Image

Remove the aluminum swing arm cap nut.
Image

Loosen the hex nut. I didn’t remove the bearing pivot just yet.
Image

I measure the gap both sides of the swing arm for reference.
Image

I used a stand to release the pressure on the shocks and remove the screws.
Image

Image

You need to move the brake shoe to have access to the right shock bolt.
Image

I used clamps to hold the drive shaft and swing arm in place to relieve pressure and make easier removing both bearing pivots.

Image
The pin tool is necessary.
Image

Next I remove the clamps and separate with a plastic pray bar, the hardy disc and then remove the swing arm.

Image

Remove the safety and the pivot pins to remove the clutch lever.

Image

I may not need to, but I remove the kickstart lever stop too.
Image

Don’t forget the neutral switch wire and the clutch cable sleeve!
Image

Image
Image

Remove the 4 gear box nuts and the exhaust pipe retaining bracket.
Image

Lower the left front foot peg, do not remove the bolt.
Image

Place a plastic folder under the gear box to protect the frame paint.
Image

Image

Remove the gear box following the Barrington indications.
I tie a robe to help me lift the gear box.

Image

Image

Voilà!
San Arthur in San Antonio, Texas
'58 R26 '76 R90S '94 R100GS/PD

User avatar
San Arthur
Posts: 501
Joined: Sun Apr 22, 2007 2:08 pm

Re: R26 gearbox removal.

Post by San Arthur »

jwonder wrote:
Mon Sep 20, 2021 8:44 am
If you need help let me know, I have done several rebuilds of these R26/R27 gearboxes. They are quite straightforward with a few "gotcha's" here and there.
Thanks jwonder, my nephew helped me with heavy lifting.

Saludos
San Arthur in San Antonio, Texas
'58 R26 '76 R90S '94 R100GS/PD

Post Reply