Almost finished the rack “depowering”. Its really pretty simple. I basically followed these instrucitons: http://www.flyinmiata.com/tech/depower.php?x=1
I didnt take step by step pics, so Ill explain quickly.
1. Remove C clip from the column side of the rack (this will allow the pinion shaft to be removed later)
2. Remove the large lock nut (I had to beat it loose with a brass drift), the adjustment nut, spring and support yoke,
3. Remove the small cover on the bottom of the rack, exposing the nut that holds the pinion shaft in. Then tap the pinion shaft, bearing, seal etc, out the top side of the rack, where the C clip was removed in step 1.
This shows the bottom cover and nut removed, exposing the threads on the bottom of the pinion shaft
Here are all the pieces that should now be out
Row 1: bottom cover, pinon nut, top pinion bearing, seals C clip
Row 2: lock nut, adjustment nut, spring, (yoke not shown)
Row 3: pinion shaft
4. Loosen the large nut at the end of the rack where the pressure ports are. This may vary depending on the exact rack design. (you’ll also need to remove the boot by cutting the clamps etc.)
5. Slide off the end rack cover exposing the shaft and the pressure seal and guide.
6. Remove the bolt that holds the pressure seal in place, then tap the seal off the end of the shaft. (DO NOT REMOVE THE GUIDE BUSHING)
7. Clean up the old shaft, pinion etc, regrease and reassemble
8. Plug the unused ports however you like. I welded up the holes in the tube nuts that I pulled from the pressure lines.
Rack cleaned up.
Pressure port nuts welded up and everything painted (I have yet to decide how to plug the feed and return lines to the pump).
Tonight Im hoping to get it greased up and reassembled. Ill add the rest of the pics then.
Dan