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length of push rod for AMC gearbox and clutch #76337
08/28/08 5:30 am
08/28/08 5:30 am
Joined: Jun 2008
Posts: 19
Victoria Australia
B
bmckeegan Offline OP
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bmckeegan  Offline OP
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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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Re: length of push rod for AMC gearbox and clutch #76338
08/28/08 12:19 pm
08/28/08 12:19 pm
Joined: Aug 2001
Posts: 1,259
Hamilton, Mass. USA
D
Dave Comeau Offline

Crew Chief
Dave Comeau  Offline

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Joined: Aug 2001
Posts: 1,259
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
Ducati 3 1992-2002
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Re: length of push rod for AMC gearbox and clutch #76339
08/28/08 4:03 pm
08/28/08 4:03 pm
Joined: Aug 2005
Posts: 174
Melbourne australia.
S
spook Offline
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spook  Offline
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Joined: Aug 2005
Posts: 174
Melbourne australia.
Sounds like I have to make a longer one. See you on the weekend.

Re: length of push rod for AMC gearbox and clutch #76340
08/28/08 5:05 pm
08/28/08 5:05 pm
Joined: Sep 2006
Posts: 157
FRANCE- DINARD -BRITTANY
marinatlas Online content
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marinatlas  Online Content
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Joined: Sep 2006
Posts: 157
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.

Re: length of push rod for AMC gearbox and clutch #76341
08/29/08 8:39 am
08/29/08 8:39 am
Joined: Sep 2002
Posts: 510
belgium
ludwig Online content
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ludwig  Online Content
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Joined: Sep 2002
Posts: 510
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 .

Re: length of push rod for AMC gearbox and clutch #76342
08/30/08 6:33 pm
08/30/08 6:33 pm
Joined: Nov 2006
Posts: 30
Sweden
A
AndersA Offline
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AndersA  Offline
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A
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 ?

Re: length of push rod for AMC gearbox and clutch #76343
08/31/08 1:25 pm
08/31/08 1:25 pm
Joined: Sep 2002
Posts: 510
belgium
ludwig Online content
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ludwig  Online Content
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Joined: Sep 2002
Posts: 510
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.
Re: length of push rod for AMC gearbox and clutch #76344
08/31/08 4:50 pm
08/31/08 4:50 pm
Joined: Nov 2006
Posts: 30
Sweden
A
AndersA Offline
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AndersA  Offline
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A
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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