Canon imagePRESS C850 Series Troubleshooting Manual page 71

B-3-2) Remove the e-rings [3] (x3pcs) to remove the follower roller and then draw out the feed roller.
[Reference]
- Some models have only 2pcs of e-rings.
- Some models have a pin attached to the follower roller
B-3-3) Remove the e-rings [4] (x2pcs) to detach the estrangement rack [1].
B-4) Put marks with a magic marker on the teeth of the gear meshing with the estrangement rack.
B-5) Visually, check the condition of the teeth marked in the step B-4).
If chipped/shaved teeth are observed, shift the phase of the gear position by rotating by 180 degrees at angle.
The picture [A] shows a shaved gear tooth in a triangle shape. The picture [B], a gear tooth in the normal shape.
B-6) Clean up the soiling and filings attached to the estrangement rack and the gear with lint-free paper moistened with alcohol.
B-7) Apply Molykote EM-50L (HY9-0007-000) to at 4 locations on the front/back sides of the estrangement rack shown in the
following illustrations.
-Apply Molykote in an amount of a grain of rice (approximate 20mg) per a portion.
-Apply all over the teeth in the rack section [a] that meshes with the gear.
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