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Service Guide ML590/ML591
Chapter 3 Maintenance & Disassembly
3.5 LUBRICATION
3.5.01 General Information
If the lubrication procedures are not performed properly, the printer will require more frequent
cleaning. Excessive lubricant attracts dust and accumulations build up quickly. An accumulation of
paper dust is the most frequent cause of print quality problems in a dot matrix printer.
3.5.02 Lubrication Schedule
Routine inspection and lubricating should be performed:
once a year
or
every 600 hours of operating time.
3.5.03 Lubrication Types
Machine Oil or equivalent
Moly-lube Grease or equivalent
3.5.04 Lubrication Amounts
DO NOT
over-lubricate the printer. Operational problems are caused by excess lubricant. The
excess lubricant causes dust to accumulate. These accumulations can jam gears or cause print
problems.
The Lubrication Table will direct you to use the following amounts of lubricant.
Medium
Oil: three to four drops
Grease: thin coating (approximately .015 inch)
Small
Oil: one drop
Grease: extremely thin coating (approximately .008 inch)
3.5.05 Lubrication Table
Area to be Lubricated
Disassembly
Procedure
Lubricant Amount
Visible Bearings of Gears in Gear Case
Assembly
3.2.04
Oil Small
Bearing of Pull-up Roller Shaft
3.2.05
Grease Medium
Contact between Idle Gear Bearing and
Pull-up Roller Shaft
3.2.05
Grease Medium