RRussellTx - 1974 Commando 850 Project

htown16 said:
As I recall those are both a sliding fit on the shaft and in the gear. Are they new replacement bushings? I replaced the bronze bushings in one rebuild with new and they were tight, so I gently relieved them with some fine grit emery paper. A better option might be to have them reamed at least the inner clearance.
Click to expand...
I have everything apart and mostly cleaned up. I am getting ready to go back together after I finish sealing the case with the ShineSeal that showed up yesterday. I also need to do some more blasting with #8 bead to try to get the aluminum to close up a little better before I seal it.

The bushings don't have much wear so I was not planning to replace them. I am following along with the series of videos below. If you go the 7:32 mark of the video link below you can see what I am asking about. The ones that came out of my transmission do not slide. They are stuck solid. I soaked in in mineral spirits for a few days. Heated them in the oven and quenched in oil. Tried the freezer. Looking for more options before I get brutal...



Thanks for the help!
 
RussellTx said:
I have everything apart and mostly cleaned up. I am getting ready to go back together after I finish sealing the case with the ShineSeal that showed up yesterday. I also need to do some more blasting with #8 bead to try to get the aluminum to close up a little better before I seal it.

The bushings don't have much wear so I was not planning to replace them. I am following along with the series of videos below. If you go the 7:32 mark of the video link below you can see what I am asking about. The ones that came out of my transmission do not slide. They are stuck solid. I soaked in in mineral spirits for a few days. Heated them in the oven and quenched in oil. Tried the freezer. Looking for more options before I get brutal...



Thanks for the help!
Click to expand...

If your #8 bead is glass oxide then it is risky to use it on aluminum internals . The aluminum is soft and the beads can become imbedded in the aluminum only to find their way out later and into bearings , etc . Soda blasting much safer .
 
Sintered bronze bushes.

No, the sleeve gear is probably original Mk2/Mk2A (064991) type so there may only be the one groove at the outer end.
RRussellTx - 1974 Commando 850 Project

The mainshaft circlip is in the parts book item 53.
andover-norton.co.uk

Andover Norton Parts Drawings - Genuine Andover Norton Factory Parts - Commando Parts

Andover Norton Parts are the only Norton spare parts in the market manufactured to original drawings, within the factory-approved tolerances, from the correct materials, and with the correct finish.
andover-norton.co.uk
 
Last edited:
L.A.B. said:
Sintered bronze bushes.

No, the sleeve gear is probably original Mk2/Mk2A (064991) type so there may only be the one groove at the outer end.
RRussellTx - 1974 Commando 850 Project

The mainshaft circlip is in the parts book item 53.
andover-norton.co.uk

Andover Norton Parts Drawings - Genuine Andover Norton Factory Parts - Commando Parts

Andover Norton Parts are the only Norton spare parts in the market manufactured to original drawings, within the factory-approved tolerances, from the correct materials, and with the correct finish.
andover-norton.co.uk
Click to expand...
Yup, I got all that, he pointed out the circle in a later video. My sleeve gear is good and exactly like the one in the video. It even has the 3 bushes like the one that failed in the video.

I'm trying to figure out the layshaft 3rd, and mainshaft 2nd being stuck in my transmission.
I believe they should spin like in the video at 7:32 minutes but I can't get them to free up.

Thanks for the help, much appreciated!
 
RussellTx said:
I'm trying to figure out the layshaft 3rd, and mainshaft 2nd being stuck in my transmission.
I believe they should spin like in the video at 7:32 minutes but I can't get them to free up.
Click to expand...

Yes, they should.
 
I don't think heating will help, seems like bronze would expand faster than the steel gear. You might try this stuff, l've used it before. Find a socket the exact same size as the bush and use as a driver,
www.crcindustries.com

CRC® Freeze-Off® Super Penetrant, 11.5 Wt Oz

Give your rusty, seized bolts, nuts, and fixtures a new life with CRC Freeze-Off® Super Penetrant. This one-of-a-kind spray will target rusted surfaces, parts, and equipment corroded by the elements. Packed in a light, aerosol can, its trouble-free application guarantees fast and effective...
www.crcindustries.com www.crcindustries.com
 
Little more explanation. Use a socket the size of the bush or perhaps a shade smaller on one side. Use a socket on the other side that is a little bigger than the bush. If you have a bench vise large enough put them in it and have the small socket push the bush into the larger one as you tighten it. If you don't have a big enough vise use a bolt with washers on it and a nut. Put the bolt through the sockets and tighten the nut. Slow and even pressure should remove it without any damage. You probably don't even need the freeze off but it's good stuff to have around,
 
htown16 said:
Little more explanation. Use a socket the size of the bush or perhaps a shade smaller on one side. Use a socket on the other side that is a little bigger than the bush. If you have a bench vise large enough put them in it and have the small socket push the bush into the larger one as you tighten it. If you don't have a big enough vise use a bolt with washers on it and a nut. Put the bolt through the sockets and tighten the nut. Slow and even pressure should remove it without any damage. You probably don't even need the freeze off but it's good stuff to have around,
Click to expand...
Thanks, I was using the heat to try to get oil between the bush and the gear. I finally gave up on that route and put it in the freezer for a bit and then just pressed it out.

Looked pretty black in there and I’m soaking it now to try to clean up.
 
L.A.B. said:
Eh, circle, who, video, have I missed something?

Are you using the 850 Mk2/2A parts supplement?
Click to expand...
Spellcheck strikes again. I meant the circlip that you mentioned.

I thought you saw in the video where he did not find the part number for it so you were helping me out by telling me where to find it.

I have the parts book and know where the circlip is because he corrected his comment in one of his later videos.

In short, I’m good there and thanks for the help!
 
If your Commando has the later sealed swingarm pivot assembly then you won't find those parts in the Mk2/2A supplement (or on ANs web page) although they are available.
 

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