CHAPTER 3
Maintenance & Troubleshooting
Periodic maintenance
Periodic maintenance is service to be performed on the
equipment at regular intervals, designed to help mini
-
mize unscheduled production down time and premature
parts failure. FLOW recommends that you keep detailed
service records to help you prepare a maintenance
schedule that is compatible with your application and
production requirements.
General precautions
Observe the following general precautions at all times.
Review the safety information in Chapter 2 before per-
forming any maintenance or service, and pay attention to
the safety messages in the maintenance and service pro
-
cedures. Do not make any unauthorized changes to
equipment or components.
Electrical
•
Maintain all electrical components, protective guards,
and shutdown devices according to approved prac
-
tices.
•
Make sure power cannot be applied to equipment
during maintenance work by turning off the main
electrical disconnect and locking it out.
•
Before servicing, use a volt meter to make sure the
system is not energized. Take extra precautions when
servicing the electrical system in a damp
environment.
•
Never use jumper wires across fuses, fuse holders, or
breakers.
•
Do not use metal rulers, flashlights, pencils, or tools
that have exposed conducting material.
•
De-energize all equipment before connecting or dis
-
connecting meters or test leads.
•
When connecting the volt meter to terminals for
measurement, use a range higher than the expected
voltage.
•
Replacement wires must conform to the manufac-
turer’s specifications, including proper color coding
and wire numbers.
Mechanical
•
Use only high-pressure fittings, valves, and tubing
certified for 60,000 psi (4140 bar) when making
changes to the high-pressure water system.
•
Immediately repair any leaks in fittings or connec
-
tions. Torque all fittings to the manufacturer’s
specifications.
•
When pressurizing any new, rebuilt, or recently ser
-
viced high-pressure component, clear all personnel
from the immediate area until system pressure has
been applied for three minutes and cycled on and
off at least three times. At first startup, run the pump
at low pressure. Then, if no leaks or problems occur,
increase the pressure to the full operating pressure
and continue.
•
Do not touch high-pressure leaks.
•
Bleed down the system pressure before servicing
any part of the system. Never tighten pressurized fit
-
tings.
•
Follow the manufacturer’s recommendations for ser
-
vicing the equipment, and use only original manu
-
facturer replacement parts.
© Flow International Corporation M-416 | 23
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