Inspecting the Tip Cleaning Assembly

Remove debris chute hood by lifting straight up

Remove purge block and flicker/brush assemblies by lifting straight up and off their locating pins

Keep track of which assembly was on which side and replace them accordingly

If necessary, clean all parts and the surrounding areas using a vacuum, soft brush, and pick

Inspect the Kapton tape that lines the top of the hood

If the tape is torn or showing excessive wear, peel it off and replace it

Minor creases in the tape are acceptable

Inspect the purge block for any pock marks or surface irregularities (there should be none), and ensure it can sit flush on its ledge

Replace the purge block if necessary and discard the old one

Inspect the flickers for bends or excessive notches

If the flicker is worn, replace it by loosening and removing the screw that holds it in place

Inspect the brushes for any notches in the bristle pattern

Some frayed wires are acceptable, but the top edge of the brush profile should be straight

If the brush is worn, replace the entire assembly

This step is only necessary if you replaced one or both of the flicker/brush assemblies

Reinstall all components except for the debris chute hood

Loosen both adjustment screws by at least half a turn. This ensures that the new flickers will not be damaged if they are too high

With the oven door closed, navigate to Maintenance > Procedures > CHECK THIS

Tighten each adjustment screw incrementally, checking the height between adjustments, until the tips gently contact the flicker and brush with each pass

Reinstall all the components of the tip cleaning assembly, as well as the debris chute hood