These fans are from early and later model TCs. They appear to be the same but differ electrically. The fan on the left is Apple P/N 607-2113 and the fan on the right is Apple P/N 607-3650. NOTE: We will fit a 33 Ohm resistor to -2113 and a 39 Ohm resistor to -3650. 33 Ohms on a -3650 makes it run too fast and make too much noise!
Having removed the fan from the baseplate by pushing the rubber pillars through the holes, now remove the pillars from the fan.
Gently stretch away from the fan and hold against the side.
Now push the end through the hole; a small plain -blade screwdriver is better than the pliers shown.
Until it can be pulled out without snapping off the head.
With sharp side cutters, cut here.
It should look clean, like this.
Next cut the pillar like so...
Top, bottom and pieces removed.
Clamp the bottom piece.
Apply 'superglue'. Just a dab...
... it should look 'wet' only.
Carefully apply the top and press together.
Resulting in a shortened pillar. It will be possible, if you're quick, to reposition the top and bottom pieces for a better fit.
Before and after. I really should have 'repositioned' those top and bottom pieces!
Re-insert into the other side of the fan. Repeat for the other two support pillars.
Extra text added here to REALLY emphasise which wire to cut and which wire needs the resistor!
Cut the control line. Snip and strip back the 5V line. 'Tin' the ends with solder.
A 33 Ohm, (or 39 Ohm for fan type -3650) 1/2 Watt resistor, small and large pieces of heatshrink tubing.
Solder in the resistor.
Apply the heatshrink.
Shrink it to fit tightly.
Peel back the sponge gasket and hold it back with tape.
Apply the tape 'patch' with non-sticky piece on the inside. I have not shown how to make the 'inside' patch but it needs another bit of tape put over the hole and a very sharp tipped knife to cut out around the opening.
Trim away the surplus tape with a sharp blade.
I sign mine with year and week number... vanity, all is vanity! You could add 'COPYRIGHT - CHRIS FACKRELL' :-)
A completed fan 'assembly', ready for fitting to the base plate.