Lubrication - OKIDATA ML320 Service Manual

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 lubrication should be performed as listed below.
Every six months
or
300 hours of operation
or
When a part on the lubrication schedule is replaced
3.5.03 Lubrication Types
Grease (Dow Corning BR2 or equivalent)
Machine Oil (10 - 30 weight)
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 Chart will direct you to use the following amounts of lubricant.
Medium
Oil: three to four drops
Grease: thin coating (approximately 0.15 inch)
Small
Oil: one drop
Grease: extremely thin coating (approximately 0.008 inch)
3.5.05 Lubrication Table
Lubrication Disassembly
Point Procedure
Ribbon Drive 3.2.14
Assembly
(Visible
bearings of
gears)
Service Guide ML320/ML321
Chapter 3 Maintenance & Disassembly
Lubricant Amount
Machine Oil Small
Page: 81
Notes
Do NOT
lubricate the
teeth of the
gears. Do NOT
disassemble
the case.