- Joined
- Apr 15, 2009
- Messages
- 11,525
The wife finally gave me enough time to make it back out the garage. I spent the first bit sorting the frame parts to be powdercoated and tapping the threads and adding bolts to protect said threads. Next for the frame is to document and print out the pictures of how to mask the frame for the powdercoater. Maybe next weekend for that.
Back to the gearbox...
The box does not match the serial number of the engine, in fact the gearbox is a wee bit earlier (149xxx or so) for a 72 Combat.
Cover off.
Tapping the sleeve shaft lightly was all it took to loosen the inner cover.
Sorry about the blurry picture.
This is the one area I'm stuck on. Can't get this nut off. Manual doesn't help. It says something about locking the rear brake, not much good on the bench. Heated it, Liquid Wrench, air impact wrench... Nothing. It sure look like it isn't a reverse thread. Is it? Sprayed some more Liquid Wrench on it. Maybe next time it'll come off.
Next out was the layshaft bearing. It's behind the shaft on the left. Just heated the case on the outside for a few minutes and that's all it took. Wiggled the shaft and the bearing and all popped out.
It's stuck to the shaft so more heat on the bearing and tapped on the gears which popped the bearing off.
Here's the bearing. Is this the infamous kind that likes to explode? It was a little rough.
<I don't know where this photo went>
Then the sleeve gear bearing. Again a little heat (handheld propane) on the case and a few light taps and out she came. This bearing was rusty and NFG. Would barely turn.
All empty. Camplate and gear selector came out with no problems. Helps to have to some Whitworth wrenches as the bolts holding these two items in were Whitworth. Funny thing was that the drain plug wasn't.
All the parts. Hope I can remember where they all go. :mrgreen:
Next is to give everything a good cleaning. Gears all looked really good. Perhaps it was from a low mileage bike? Or the earlier bikes were just made better? Dunno.
I have a complete gearbox rebuild kit, bearings, gaskets, bushes, etc. I'm going to have some questions about replacing the bushes. The selector and camplate bushes felt really good. Not sure if I'll replace those.
So: Get that mainshaft nut off, replace any bushes I can, and put it back together.
Back to the gearbox...
The box does not match the serial number of the engine, in fact the gearbox is a wee bit earlier (149xxx or so) for a 72 Combat.
Cover off.
Tapping the sleeve shaft lightly was all it took to loosen the inner cover.
Sorry about the blurry picture.
This is the one area I'm stuck on. Can't get this nut off. Manual doesn't help. It says something about locking the rear brake, not much good on the bench. Heated it, Liquid Wrench, air impact wrench... Nothing. It sure look like it isn't a reverse thread. Is it? Sprayed some more Liquid Wrench on it. Maybe next time it'll come off.
Next out was the layshaft bearing. It's behind the shaft on the left. Just heated the case on the outside for a few minutes and that's all it took. Wiggled the shaft and the bearing and all popped out.
It's stuck to the shaft so more heat on the bearing and tapped on the gears which popped the bearing off.
Here's the bearing. Is this the infamous kind that likes to explode? It was a little rough.
<I don't know where this photo went>
Then the sleeve gear bearing. Again a little heat (handheld propane) on the case and a few light taps and out she came. This bearing was rusty and NFG. Would barely turn.
All empty. Camplate and gear selector came out with no problems. Helps to have to some Whitworth wrenches as the bolts holding these two items in were Whitworth. Funny thing was that the drain plug wasn't.
All the parts. Hope I can remember where they all go. :mrgreen:
Next is to give everything a good cleaning. Gears all looked really good. Perhaps it was from a low mileage bike? Or the earlier bikes were just made better? Dunno.
I have a complete gearbox rebuild kit, bearings, gaskets, bushes, etc. I'm going to have some questions about replacing the bushes. The selector and camplate bushes felt really good. Not sure if I'll replace those.
So: Get that mainshaft nut off, replace any bushes I can, and put it back together.