I have two Majors; I am assuming the procedure is the same for the SJ or
Mini and the only difference is size of the machine and of the burrs.
If I am wrong, I am sure someone will correct me. The only tool you
should need is a straight slot screwdriver.
1. Unplug the machine, lest something really stupid happen.
2. Remove the hopper.
3. Remove the big chrome adjustment ring. It should turn clockwise to
remove it. Pressing down on the center sleeve that sticks up thru the
hole might make it easier to turn.
4. Lift that center sleeve from the grinder. It is the upper burr
carrier. The burr is attached by 3 screws. Just remove the screws,
remove the upper burr, clean the carrier behind the burr (it collects
coffee grinds in the little space), then replace the burr with the new one.
5. Remove the 3 screws from the bottom burr. Lift it out, clean
everything, then replace with the new burr and tighten screws.
NOTE: Make sure that both burrs are seated properly and that there is
no coffee grounds or other debris keeping either burr from seating flush.
6. Make sure the 4 springs are in place in the grinder housing,
especially if you have taken an air hose to it as I do. Those boogers
are a bitch to find in a dirty garage when they take a compressed air
ride across the room.
7. I usually apply a minute amount of lithium grease to the brass
threads of the adjustment ring before replacing it. Remember, it turns
counter clockwise when putting it back on. Again, pressing down on the
upper burr carrier makes it easier to turn the ring.
I tighten it all the way down, the back off a bit, then plug the grinder
in, turn it on and adjust the setting. I have true 0 marked on the
adjustment ring with a magic marker. This is where the burrs just make
contact when running. This point sometimes changes when installing new
burrs, so marking "0" with your old burrs installed may just be a waste
of time. Trial and error will tell you how to adjust the burrs for
espresso, drip, FP etc.
RK Drum roasting in Chesapeake, VA
Paul Jolly wrote: