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#76337 - 08/28/08 5:30 am length of push rod for AMC gearbox and clutch  
Joined: Jun 2008
Posts: 19
bmckeegan Offline
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bmckeegan  Offline
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Joined: Jun 2008
Posts: 19
Victoria Australia
is anyone able to provide details of the length of the push rod (clutch thrust rod) for an AMC gearbox with a 5 plate clutch?

cheers
Brendan

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#76338 - 08/28/08 12:19 pm Re: length of push rod for AMC gearbox and clutch  
Joined: Aug 2001
Posts: 1,253
Dave Comeau Offline
Crew Chief
Dave Comeau  Offline

Crew Chief

Joined: Aug 2001
Posts: 1,253
Hamilton, Mass. USA
The clutch pushrod length depends on which clutch you use. commando (7-9 plates) or coil spring (? plates)

added:
commando 9-26/32"
atlas 9-22/32"


dynodave
BSA 3 1961-1963
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#76339 - 08/28/08 4:03 pm Re: length of push rod for AMC gearbox and clutch  
Joined: Aug 2005
Posts: 168
spook Offline
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spook  Offline
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Joined: Aug 2005
Posts: 168
Melbourne australia.
Sounds like I have to make a longer one. See you on the weekend.

#76340 - 08/28/08 5:05 pm Re: length of push rod for AMC gearbox and clutch  
Joined: Sep 2006
Posts: 156
marinatlas Offline
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marinatlas  Offline
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Joined: Sep 2006
Posts: 156
FRANCE- DINARD -BRITTANY
Hi , if you need a longer one , why don't you add any 1/4" balls (you cut your actual pushrod in the middle and add it /them into the mainshaft), it could help.

#76341 - 08/29/08 8:39 am Re: length of push rod for AMC gearbox and clutch  
Joined: Sep 2002
Posts: 487
ludwig Offline
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ludwig  Offline
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Joined: Sep 2002
Posts: 487
belgium
I use : a rod length of +/- 20 cm , than a 1/4" bearing ball , and the last 3-4 cm (clutch side) rod is made out of a 6.8 mm drill shaft . (6.8 drill bits are very common in a metric world )
This short piece of rod is made to a perfect sliding fit and can easily be removed to be ground to the correct length . It effectivly stops gear oil migrating . I have this setup long before DD's CRS was available .

#76342 - 08/30/08 6:33 pm Re: length of push rod for AMC gearbox and clutch  
Joined: Nov 2006
Posts: 30
AndersA Offline
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AndersA  Offline
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Joined: Nov 2006
Posts: 30
Sweden
Ludwig, now you made my day!
This proves my theory "never ever throw anything away" ,an old broken drill may come in handy some day!

Do you do anything with the shaft or will it be oiltight enough as-is ?

#76343 - 08/31/08 1:25 pm Re: length of push rod for AMC gearbox and clutch  
Joined: Sep 2002
Posts: 487
ludwig Offline
BritBike Forum member
ludwig  Offline
BritBike Forum member

Joined: Sep 2002
Posts: 487
belgium
It won't just fit in . The hole in the mainshaft is not machined . You have to hone and polish it to make a perfect fit . I think I used valve grinding paste and polish . (can't remember , its been too long )
this is how it looks after a 3000 km trip :
I dindn't clean it up . there is no trace of oil seepage . The length of the tip is such that the felt ring exactly fills the gap between mainshaft and adjusting bolt . Felt ring is more to keep the tip lubricated than to keep oil in .



Last edited by ludwig; 04/09/10 7:35 am.
#76344 - 08/31/08 4:50 pm Re: length of push rod for AMC gearbox and clutch  
Joined: Nov 2006
Posts: 30
AndersA Offline
BritBike Forum member
AndersA  Offline
BritBike Forum member

Joined: Nov 2006
Posts: 30
Sweden
Thanks Ludwig!

IŽll do this mod to my quaife box this winter.


Moderated by  Dave Comeau 


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