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Cl77 Crank shaft

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GORDON BROWN
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Location: edinburgh scotland

CL crank

Post by GORDON BROWN » Tue Feb 26, 2019 3:39 am

Hello Mike

Graham has answered the questions, unfortunately I am a bit away from Norfolk, near Edinburgh. If you don't want to fit a new end to what you have I will see what I have.

Gordon

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G-Man
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Re: CL crank

Post by G-Man » Tue Feb 26, 2019 3:48 am

I can probably find you a fresh crank end and fit it for you if your Engineering shop cannot help.

G
GORDON BROWN wrote:Hello Mike

Graham has answered the questions, unfortunately I am a bit away from Norfolk, near Edinburgh. If you don't want to fit a new end to what you have I will see what I have.

Gordon
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

thepunisher2007
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Post by thepunisher2007 » Tue Feb 26, 2019 1:54 pm

apologies for the reply delay and thanks for the help

ill pm you g if that’s ok.

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G-Man
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Post by G-Man » Tue Feb 26, 2019 2:16 pm

Yes - no problem.

G

thepunisher2007 wrote:apologies for the reply delay and thanks for the help

ill pm you g if that’s ok.
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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G-Man
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Joined: Wed Mar 25, 2009 5:17 pm
Location: Derby, UK
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Post by G-Man » Fri Mar 22, 2019 3:51 pm

I got the crank yesterday afternoon and pulled off the generator side web. The big end cage looked a bit horrible and one or two rollers were damaged but the rod and big end pin looked fine.

Image

I didn't have a CL77 generator-side web so I used a CB77 part and blocked off the oil hole.

Image

Having done that side I decided that I couldn't leave the other side of the crank untouched. The other big end had the same nasty-looking wear on the cage but the rollers looked fine. In went another fresh cage after a good clean up.

Image

Everything went back nicely and trued up without any drama. It should do the job for the forseeable future.

Image


G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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sixtiescycle
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Location: Gresham, OR

Re: Cl77 Crank shaft

Post by sixtiescycle » Thu Jul 18, 2019 9:43 am

thepunisher2007 wrote: has a tap snapped off in the internal thread which is proving impossible to get out.
thanks
Mike
Haven't been here much since the spam, I have removed several taps and broken bolts over the years with a plasma cutter, pretty much washes the the bolt out with damaging the threads. The tap you just cut through the center.

Dick
Dick Johnson
'61 CB92
'63 domestic CL72 Type 2
'63 CL72
'65 CL77
'66 CB77
'67 CB450D
'71 SL350
'71 XS1B

AlanW
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Post by AlanW » Sun Jul 21, 2019 3:46 pm

Please do NOT go anywhere near it with a plasma cutter, you could easily wreck it. I have been in the fabrication industry all my life and have many years experience with these machines and would not attempt it on one of my cranks.
I suggest you go to you tube and look at methods of broken tap removal.

Hope this helps, Al.

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