Another guide, now for the 600 STIs. These were in very bad cosmetic condition(on the brink of being unusable) and the shifters did not click at all. Obvious signs of the gummed up grease.
600 levers are not symmetrical. The right side lever is different to the left side lever. So I will be going through both left and right sides in this guide.
Use a 2mm allen key to remove this grub screw. Theres a little threadlock so it may be tight.
Get some sort of tool(4mm key in this case) to push out the pivot.
Now you can remove the lever from the body. Use a knife or flat edged tool to peel off the 600 badge.
Use a 8mm socket to unscrew the nameplate screw. Make sure youre holding onto both the name plate and the lever when unscrewing, otherise there is a possibility that the name plate will go flying off as its connected to a loaded spring.
Carefully lift whilst twisting the name plate off. You will be greeted with this spring. This is different to the assembly of the new Sora(3300) and 105(5500) levers, but exactly the same as the RX100 and RSX. Id say its much more easy to dismantle and rebuild because the spring is here.
Flip to the backside of the lever, and push over the smaller lever to reveal a Phillips screw. Unscrew this, and be careful of a small screw washer behind.