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jspbtown
Samba Member
Joined: January 27, 2004
Posts: 5157
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 Posted: Thu Jan 07, 2010 5:19 pm Post subject: CNC master cylinder rebuild |
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I have 3 CNC 3/4" square reservoir master cylinders that need to be rebuilt.
I have the kits but want to make sure I do it right.
Does anyone know where I can find an exploded diagram? |
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DirtGhost
Samba Member
Joined: September 19, 2007
Posts: 547
Location: Greensboro,NC
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| Posted: Mon Jan 11, 2010 10:34 am Post subject: |
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As you take it apart lay it out in a line . replace the parts you need to replace . put back together.
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Orange Boxx Design and Fabrication |
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busk
Samba Member
Joined: September 29, 2008
Posts: 160
Location: Brea, CA
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| Posted: Mon Jan 11, 2010 9:14 pm Post subject: |
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| its actually pretty simple just do one at a time and there really is not very many parts to replace |
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jspbtown
Samba Member
Joined: January 27, 2004
Posts: 5157
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| Posted: Tue Jan 12, 2010 10:53 am Post subject: |
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| That would be perfect if I had not already dis-assembled all three and cleaned them all in prep for the rebuild. |
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DirtGhost
Samba Member
Joined: September 19, 2007
Posts: 547
Location: Greensboro,NC
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shred625
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Joined: October 10, 2007
Posts: 1328
Location: Huntington Beach Ca
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| Posted: Tue Jan 12, 2010 1:14 pm Post subject: |
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| jspbtown wrote: |
| That would be perfect if I had not already dis-assembled all three and cleaned them all in prep for the rebuild. |
That deserves a Darwin award!
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“It takes a big man to cry, but it takes a bigger man to laugh at that man.”
~ Jack Handey |
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DirtGhost
Samba Member
Joined: September 19, 2007
Posts: 547
Location: Greensboro,NC
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| Posted: Tue Jan 12, 2010 1:19 pm Post subject: |
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| shred625 wrote: |
| jspbtown wrote: |
| That would be perfect if I had not already dis-assembled all three and cleaned them all in prep for the rebuild. |
That deserves a Darwin award! |
That is not really nice. He could be new to all this.
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Orange Boxx Design and Fabrication |
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shred625
Samba Member
Joined: October 10, 2007
Posts: 1328
Location: Huntington Beach Ca
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| Posted: Tue Jan 12, 2010 1:44 pm Post subject: |
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| DirtGhost wrote: |
| shred625 wrote: |
| jspbtown wrote: |
| That would be perfect if I had not already dis-assembled all three and cleaned them all in prep for the rebuild. |
That deserves a Darwin award! |
That is not really nice. He could be new to all this. |
Its all in fun......... we have all done it!
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“It takes a big man to cry, but it takes a bigger man to laugh at that man.”
~ Jack Handey |
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olmer2
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Joined: June 28, 2009
Posts: 781
Location: chattanooga TN
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| Posted: Tue Jan 12, 2010 9:35 pm Post subject: |
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| shred625 wrote: |
| DirtGhost wrote: |
| shred625 wrote: |
| jspbtown wrote: |
| That would be perfect if I had not already dis-assembled all three and cleaned them all in prep for the rebuild. |
That deserves a Darwin award! |
That is not really nice. He could be new to all this. |
Its all in fun......... we have all done it! |
X2 on the award! I got my first award (of many) when I disassembled the drums all the way around on the farm tractor. Yup, you guessed it, no book. 
I'll go out tomorrow and dissasmble mind for you and take pics. (I need to rebuild mine badly, I just need to find a rebuild kit). The CNC is a little different from the diagram posted. If you have any questions feel free to shoot me note. |
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ZARJDR
Samba Member
Joined: October 27, 2008
Posts: 1039
Location: Eureka, Ca
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| Posted: Tue Jan 12, 2010 10:51 pm Post subject: |
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The only thing I have encountered with them is that the brake piston can be different from the piston for the clutch. It may have an extra little plastic cup with a seal at the very end(pressure side). They are specific as to the way the cup and seal orient, the rest is pretty straight forward.
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jspbtown
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Joined: January 27, 2004
Posts: 5157
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| Posted: Wed Jan 13, 2010 6:39 am Post subject: |
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I agree....not the smartest move...but I did do one thing correctly. When I removed the first I kept it all in order and taped it together so I do have a "template" to go by. I just thought that since they sell rebuild kits they would have diagrams readily available.
All three were in really bad shape. They had been left outside and ignored for years. The brake fluid inside was like a firm, crumbled jello. The screws on the easy fill caps were rotted. The caps were corroded and stuck. They were a mess. I have cleaned them, done some paint to detail them, and honed the cylinders. |
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j1mmy420
Samba Member
Joined: January 14, 2016
Posts: 1
Location: Victorville
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| Posted: Thu Jan 28, 2016 8:39 pm Post subject: Re: CNC master cylinder rebuild |
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does this look right?
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MacLeod Willy
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Joined: February 18, 2014
Posts: 933
Location: Ontario Canada
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| Posted: Thu Jan 28, 2016 8:48 pm Post subject: |
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| jspbtown wrote: |
| The brake fluid inside was like a firm, crumbled jello. |
You might want to look inside the wheel cylinders too then. Sounds like mis-matched brake fluid.
Flush the whole system very well. |
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