Foxcroft FX-1000p, Instruction Manual

Page: 44 / 58

Parts Replacement
1. Replace all of the O-rings removed. A light coating of silicone grease may be applied to the
O-rings.
2. To replace the item #3 O-rings: in the lower block for the negative cell, stretch it slightly before
putting it into the block. To replace the second item #3 O-ring place it into the counterbore of the
large block which covers the top of the negative cell.
3. Reinsert the flushing plug and flow nozzle (tip down) into the lower block.
4. Slide the mixer onto the mixing motor shaft. Make sure the set screw lines up with the flat on the
shaft.
5. To set the mixer gap place a 5/32” spacer (e.g., a drill bit) between the end of the mixer hub and
the bottom of the mixing motor mounting plate. Tighten the set screw in the mixer firmly.
6. Inset the copper negative cell into the counterbore of the large block. Make sure the O-ring in the
block is in place.
7. Pour the new mixing balls into the negative cell.
8. Making sure the item #3 O-ring in the lower block is in place, place the lower block onto the
negative cell, push the block down until the negative cell and flow nozzle are seated with the
upper block.
Tech Tip:
When the flow nozzle is completely inserted into the upper and lower blocks you will
still see a 1/16” gap above and below the hex portion of the nozzle.
9. Reinsert the (4) 1/4”-20 screws, tighten evenly and firmly; do not over-tighten to avoid stripping
the threads in the upper block. Make sure the lower block is level and parallel with the upper
block.
Re-assembling the bottom block if the analyzer is mounted on the wall:
9a. Rotate the mixer while inserting the bottom block into the top block. This ensures that no
mixing balls get jammed under the mixer arms. Continue to rotate the mixer by hand until
mixer turns freely. Insert the four mounting screws, tighten evenly and firmly. Rotate the
mixer to be sure it is rotating freely. Make sure the lower block is level and parallel with the
upper block.
10. Re-mount the analyzer on the wall.
Figure 55 Figure 56 Figure 57
Preventive Maintenance Kit
44
FX-1000p