FFS2000 Series Chapter 11: Maintenance
Page 62 TTN047338-D02
If the vacuum ports at the bottom of the V-groove appear plugged it may be necessary to remove the inserts so
they can be “blown clean” from behind. If necessary, a 0.002” plastic shim (red) from the shim kit can be used to
clear the V-groove ports.
Note: Never use any sharp metal objects to “clean” the V-grooves or vacuum ports as this can damage the
surfaces.
11.2.2. Change / Remove FHB Inserts
The FHBs contain replaceable V-groove inserts which are designed to hold a specific coating size. Follow the
appropriate instructions below based on the style of FHBs supplied with the system.
Standard FHB (Included with Item #s FFS2000 and FFS2000PT)
To change the V-groove inserts, back off the four 2-56 set screws in the base of each FHB using a 0.035hex key
(one full turn counter-clockwise should be sufficient). The insert should slide freely side-to side and can easily be
removed by “overhanging” one end of the insert and then lifting it up and out with the hex key.
Install the new insert such that the V-groove side is up and the size label (if so imprinted) is right side up. Make
sure the new V-groove is fully seated and that the ends are flush side-to-side with the FHB sliding block. Gently
tighten the four set screws to secure in place.
The top FHB inserts can be similarly changed by loosening the four set screws accessible from the front edge of
the FHB top. For standard Ø250 µm coated fibers or smaller, the top insert is simply a flat. However, one side is
beveled more at the ends to minimize potential damage to the coating when it exits the FHB. Make sure to install
the insert with the beveled surface out.
For holding Ø900 µm fiber coatings, the top insert has a recessed center section to allow the top to close more
parallel to the base. When installing these inserts, make sure the recessed surface is facing out.
Figure 51 Change Standard FHB Insert
Rotary FHB (Included with Item #s FFS2000PM and FFS2000WS)
To change the inserts, fully loosen the two 00-96 pan head screws with a flat bladed jeweler’s screwdriver. The
screws (and insert) can be removed by lowering and raising the FHB top such that the magnets grab the screw
and/or insert. After the old insert is removed, make sure the insert pocket is clean. Then install the new insert (V-
groove side up). Replace the screws and tighten gently.
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