Discussion in 'Norton Commando Motorcycles (Classic)' started by swooshdave, Aug 17, 2018.
I went over to @Mike T place last night to assemble the crank. It was way easier with an extra pair of hands. Plus he has a massive Whitworth collection. And a vise. Oh, and a workbench.
And that kids is what $200 looks like!
300 in/lbs or 25 ft/lbs.
Tabbed washer tabbed.
Now to get the old bearings off. It was easier with the whole crank assembled so vise could grab the flywheel. If you put the counterweights in the vise there isn't a lot of room to get the puller on it.
Over the holidays I had a 25% off coupon and picked up this bearing puller set from Harbor Freight. It's quite the kit and after coupon I think it was about $35. This is the larger puller, there is also a smaller one in the set. https://www.harborfreight.com/bearing-separator-and-puller-set-62593.html
We used a heat gun to lightly heat up the bearings and with a little effort they pulled off. I felt bad taking them off, the bearings feel absolutely perfect. But since I have some lightly used Superblends and it's a Combat I can't leave the original bearings in there.
Nice Triumph !
What you don't see is the pile of bikes behind me.
Can you turn around and share a pic? Got me curious now...
This will keep you entertained for weeks. Maybe months.
Good move using that washer to take the friction wear.
Yeah, the Chinese metal didn’t stand a chance against the English iron.
Next up is the conrods. I have new nuts but will be re-using the bolts. In fact the bolts are still in the rods. I will replace the bearings, slather on some assembly lube and torque to spec. What am I forgetting?
Once I'm done there I need to turn my attention to the engine cases.
Plenty of assembly lube.
25ft/lbs Again, way less than I thought they would take. Even though they are locking nuts I still put a little locktite on. You guys have made me paranoid...
Ironically the only time I read the instructions is when there's a pretty lady on the cover.
Thanks again to @Mike T for letting me use his workshop and the video and the tools and so on.
Next I think I need to pull the blown motor to see what I can salvage. It's going to be hard finally looking at all the damage.
I'm guessing the rods went on correctly as no one mentioned anything. Side play isn't really that important, is it? Just as long as there is some?
No side play isn't as important, if you want to check the big ends you can pull the con rod to one side with your fingers then push the top part of the rod with your thumbs
Thereby rocking the rod whilst it's pulled one side
On a freshly built big end with new shells/journal in tolerance there should be no movement
Patient has been moved to the operating table.
This piece of connecting rod was found on the floor. Normally this would be found inside the engine...
For the rest of these pictures look away if you're squeamish.
I think that journal is going to need more than a light "touching up".
I found a little oil in the primary. It should be dry.
Once I remember how to remove the front pulley (there are two holes to thread the puller into) I think I can just leave the stator attached to the inner cover. Then remove the clutch. That should, sadly, give a better view of the engine.
This bearing shell fell out too. Just straighten it out and reuse it, right?
As they say Dave “shit happens” !
You’re just gonna have to bite the bullet and crack on mate. You know it’s not gonna be pretty in there.
That’s a big chunk missing from the case. You gonna repair or replace?
Do keep the pics and updates coming.
And do let us all chip in and tell you what fancy pants bits to fit... I find it’s MUCH easier spending other people’s money at times like this