It wouldn't hurt to do a manual adjustment of the # K23-478-479 that you just installed, but normally the initial break in process you did gets it tight enough. Another way to speed up the process is to travel at a slower speed like you were doing and repeatedly slide the manual override lever. With every application it should adjust one click tighter.
Let me know if you are still having weak brakes and I'll see what we can do beyond that as well! view full answer...
If you have not already done so you can adjust the brake pad pressure star wheel to increase the pad pressure on the hub surface. This will increase your braking force. Since it sounds like all the brakes are behaving in the same way (and have the same modest wear) this is most likely the issue.
You can use the brake spoon adjustment tool # W80630 or a flat blade screwdriver to rotate the star wheel upward (as viewed from the rear of the brake, where the adjustment slot is). Please refer... view full answer...
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