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-   -   Allen Keys for Shimano FD-8000 Installation (https://www.bikeforums.net/bicycle-mechanics/1255719-allen-keys-shimano-fd-8000-installation.html)

blinky 07-25-22 03:40 PM

Allen Keys for Shimano FD-8000 Installation
 
It's most certainly 2mm for the hi & low screws but then either 4mm or 5mm for the cable anchor and again 4mm or 5mm to align those magic but interesting grey lines - does anyone know which size for the grey lines ?

cxwrench 07-25-22 04:11 PM

2mm.All of the tools needed are listed here:
Front derailleur dealer manual
2mm for limits, b tension, and front der cable tension. 4mm for cable anchors.

blinky 07-26-22 08:20 AM


Originally Posted by cxwrench (Post 22587404)
2mm.All of the tools needed are listed here:
Front derailleur dealer manual
2mm for limits, b tension, and front der cable tension. 4mm for cable anchors

Thanks for the link cxwrench - I think the B-screw is only pertinent to the RD - but yes 2mm Allen for hi & lo as well as for achieving the Shimano suggested cable tension by aligning the two grey lines and the 4mm to anchor the cable - there is a 5mm Allen also used for the stablizing screw .

cxwrench 07-26-22 11:29 AM


Originally Posted by blinky (Post 22588019)
Thanks for the link cxwrench - I think the B-screw is only pertinent to the RD - but yes 2mm Allen for hi & lo as well as for achieving the Shimano suggested cable tension by aligning the two grey lines and the 4mm to anchor the cable - there is a 5mm Allen also used for the stablizing screw .

Stabilizing screw? 5mm? What is the stabilizing screw? The only thing that uses a 5mm allen is the bolt that attaches the derailleur to the braze-on mount OR tightens the band clamp screw. The 'support screw' is adjusted with a 2mm allen.

blinky 07-26-22 03:12 PM


Originally Posted by cxwrench (Post 22588303)
Stabilizing screw? 5mm? What is the stabilizing screw? The only thing that uses a 5mm allen is the bolt that attaches the derailleur to the braze-on mount OR tightens the band clamp screw. The 'support screw' is adjusted with a 2mm allen.

Yes , in some of the literature or videos it's called "stabilizing" screw and other authors use the word "support" - the following passage addresses its function - "If installing the front derailleur to a brazed-on type frame, a backup plate must be attached to the seat tube. Always be sure to install the backup plate in order to prevent damage to the frame from the pressure applied by the support bolt of the front derailleur" - and yes the 5mm key is used for the "clamp" bolt - in my view given the function of that bolt , I can buy either descriptor , i.e. either "stabilizing" or "support"
:beer:
​​​​​​​

cxwrench 07-26-22 03:25 PM

2mm allen to adjust the 'support screw'. And to correct the Shimano manual not all frames require the backup plate. With some frames the screw hits the braze-on mount itself, so no plate needed. On some frames that read is reinforced, like Trek. They have said for years the plate is not needed. Since there is a 'support screw' you'd be mixing things up to call the clamp or mounting screw by the same name.

blinky 07-26-22 06:14 PM


Originally Posted by cxwrench (Post 22588525)
2mm allen to adjust the 'support screw'. And to correct the Shimano manual not all frames require the backup plate. With some frames the screw hits the braze-on mount itself, so no plate needed. On some frames that read is reinforced, like Trek. They have said for years the plate is not needed. Since there is a 'support screw' you'd be mixing things up to call the clamp or mounting screw by the same name.

Exactly , 2mm allen for the support or aka stabilizing screw and the 5mm for the clamp screw


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