Xerox Phaser 8400

7-6 Phaser 8400/8500/8550 Color Printer
Lubrication
The printer is lubricated during assembly at the factory and requires no periodic
lubrication. Some parts require lubrication following replacement. These parts are
identified in the replacement procedures. When lubricating during replacement, use
the grease approved for all Phaser printers. The grease part number is 006-7997-00.
Caution
Plastic parts will deteriorate when unspecified grease and chemicals are used,
such as WD-40® and Locktite® Threadlocker. To avoid damage, use only the
grease specified in the Lubrication section of the Service Manual.
Inspection
Rollers: Replace the rollers when you see any of the following defects:
■ Flat spots
■ Out of roundness
■ Cracked rubber
■ Loss of traction (tackiness) causing pick or feed failures
Gears: Replace gears that show any signs of wear or breakage. Look for these
problems:
■ Thinned gear teeth
■ Bent or missing gear teeth; check especially where a metal gear drives a
plastic gear.
■ Fractured or cracked gears (Oil or incorrect grease on a plastic gear can
cause the gear to crack.)
Belts: There are 3 rubber belts in the printer. Inspect the belts for wear.
Look for these problems:
■ Loose rubber particles below the belts indicate a worn belt.
■ Missing teeth in the belts
■ Cracking or moderate fraying; a small amount of fraying is inevitable, so
look for other signs of wear before replacing the belt.