IBM System/36 Maintenance Information Manual page 10

Mechanical Safety
Do not touch moving mechanical parts when you are lubricating a part, checking for play, or doing similar
work.
Summary
Prevention is the main aid to electrical safety. Always think about electrical safety and use good practice, for
example:
• Ensure that the customer's power receptacle matches the IBM equipment specifications.
• Inspect power cables and plugs; check for loose, damaged, or worn parts.
• Review the procedures in the maintenance documents before you remove a part that can hold an
electrical charge from the machine. Carefully discharge the necessary parts exactly as instructed by the
procedure.
Never assume that a machine or a circuit is safe. No machine is always completely safe. You may not know
the exact condition of a machine. For example:
• The power receptacles could be wired wrong.
• Safety devices or features could be missing or defective.
• The design could have a problem.
• The machine could have been damaged when it was shipped.
• The machine could have an unsafe change or attachment.
• A part could be defective, therefore causing a hazard.
• A part could be assembled wrong.
These are some of the ways that the condition of the machine could affect safety. Before you start a service
call or procedure, use good judgment and caution.
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5363 Maintenance Information