3.1 Preventative Maintenance
Procedures
Purpose
By following an effective preventive maintenance
program, unscheduled downtime can be eliminated. This
program should be used by the Operation Manager to
get a maximum utilization of manpower and equipment
as well as to prevent possible unsafe situations and/or
production delays due to equipment breakdown.
Scope
The maintenance chart in figure 3 includes the items to be
regularly checked and inspected with a recommended time
schedule. These are basic maintenance recommendations,
and each company should develop their own comprehensive
preventive maintenance program schedule, tailor-made to
their individual operational procedures and requirements.
Maintenance must only be performed by a properly
trained and qualified individual following all the applicable
safety procedures.
Procedures
Every procedure herein recommended must be performed
in a safe manner (utilizing tools and/or equipment which
are free of hazards) and following the safety codes of
practice set by the authorities having jurisdiction. These
are general guidelines and are not intended to cover all
the safety aspects that must be considered and followed
while performing these procedures.
1. Visual Inspection:
This includes checking for leaks, corroded areas,
condition of hoses, piping and fittings, and any
unsafe condition which may hinder the safety of the
personnel and/or the facility.
2. Clean Inlet Strainer Screen:
A clogged strainer screen will create too much flow
restriction and vapor will be formed causing the pump
to cavitate. This reduces the pump’s capacity and
accelerates the wear of the internal parts.
3. Inspect Drive Coupling and Driveline:
Check the coupling alignment and the condition of the
union for cuts, broken sections and wear.
4. Lubricate Pump Bearings:
Use only ball bearing grease, applied with a manual
lubrication pump or gun. Always clean the grease
openings thoroughly before greasing.
5. Lubricate Motor Bearing:
Follow the recommendations of the electric motor
manufacturer for the type of grease to use and the
lubrication frequency.
6. Performance Test:
a. While transferring liquid with the pump, check the
pressure at the pump’s inlet port. The pressure
drop in the inlet piping should not be greater than
3 psi.
b. While transferring liquid with the pump, close the
discharge valve(s) so the full flow will be directed
back to the storage tank through the bypass
valve. Then slowly close the valve downstream of
the bypass valves. The discharge pressure of the
pump should increase to the maximum differential
pressure of the pump at no flow conditions (see
Appendix C—Performance Curves).
c. If the maximum differential pressure is not obtained,
the pump must be serviced. See Appendix G—
Troubleshooting Guide for additional help.
d. Replace vanes or sideplates if worn.
7. Tighten all hold-down bolts.
8. Inspect motor starter contact points. This procedure
must be performed by an authorized and qualified
electrician according to the electric motor
manufacturer’s guidelines.
9
To Next Page
Loading...
