USER INSTRUCTIONS POLYCHEM GRP ENGLISH 71569132 12-04A
Page 32 of 52
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Before working on the pump, take measures to
prevent an uncontrolled start. Put a warning board
on the starting device with the words:
"Machine under repair: do not start"
.
With electric drive equipment, lock the main switch
open and withdraw any fuses. Put a warning board
on the fuse box or main switch with the words:
"Machine under repair: do not connect".
Never clean equipment with inflammable solvents or
carbon tetrachloride. Protect yourself against toxic
fumes when using cleaning agents.
Refer to the parts list shown in section 8 for item
number references used throughout this section.
6.2 Maintenance schedule
It is recommended that a maintenance plan
and schedule is adopted, in line with these User
Instructions, to include the following:
a) Any auxiliary systems installed must be monitored,
if necessary, to ensure they function correctly.
b) Gland packings must be adjusted correctly to
give visible leakage and concentric alignment of
the gland follower to prevent excessive
temperature of the packing or follower.
c) Check for any leaks from gaskets and seals.
The correct functioning of the shaft seal must be
checked regularly.
d) Check bearing lubricant level, and if the hours
run show a lubricant change is required.
e) Check that the duty condition is in the safe
operating range for the pump.
f) Check vibration, noise level and surface temperature
at the bearings to confirm satisfactory operation.
g) Check dirt and dust is removed from areas around
close clearances, bearing housings and motors.
h) Check coupling alignment and re-align if necessary.
Our specialist service personnel can help with
preventative maintenance records and provide
condition monitoring for temperature and vibration to
identify the onset of potential problems.
If any problems are found the following sequence of
actions should take place:
a) Refer to section 7,
Faults; causes and remedies
,
for fault diagnosis.
b) Ensure equipment complies with the
recommendations in this manual.
c) Contact Flowserve if the problem persists.
6.2.1 Preventive maintenance
The following sections of this manual give instructions
on how to perform a complete maintenance overhaul.
However, it is also important to periodically repeat the
Pre start-up checks
listed in section 5.1. These
checks will help extend pump life as well as the
length of time between major overhauls.
6.2.2 Need for maintenance records
A procedure for keeping accurate maintenance
records is a critical part of any program to improve
pump reliability. There are many variables that can
contribute to pump failures. Often long term and
repetitive problems can only be solved by analyzing
these variables through pump maintenance records.
6.2.3 Cleanliness
One of the major causes of pump failure is the
presence of contaminants in the bearing housing. This
contamination can be in the form of moisture, dust, dirt
and other solid particles such as metal chips.
Contamination can also be harmful to the mechanical
seal (especially the seal faces), as well as other parts
of the pump. For example, dirt in the impeller threads
could cause the impeller to not be seated properly
against the shaft. This, in turn, could cause a series
of other problems. For these reasons, it is very
important that proper cleanliness be maintained.
Some guidelines are listed below.
After draining the oil from the bearing housing,
periodically send it out for analysis. (If it is
contaminated, determine the cause and correct.)
The work area should be clean and free from
dust, dirt, oil, grease etc.
Hands and gloves should be clean.
Only clean towels, rags, and tools should be used.
6.3 Spare parts
The decision on what spare parts to stock varies
greatly depending on many factors such as the
criticality of the application, the time required to buy
and receive new spares, the erosive/corrosive nature
of the application, and the cost of the spare part.
Section 8 identifies all of the components that make
up each pump addressed in this manual.
6.3.1 Ordering of spares
Flowserve keeps records of all pumps that have been
supplied. Spare parts can be ordered from your local
Flowserve Sales Engineer or from a Flowserve
Distributor or Representative.
