UNIREX Pump - Manual (Page 40)

MARK 3 USER INSTRUCTIONS ENGLISH 71569102 08-06
Page 40 of 68 flowserve.com
If platforms, stairs and guard rails are required for
maintenance, they must be placed for easy access to
areas where maintenance and inspection are to be
carried out. The positioning of these accessories
must not limit access or hinder the lifting of the part to
be serviced.
When air or compressed inert gas is used in the
maintenance process, the operator and anyone in the
vicinity must be careful and have the appropriate
protection.
Do not spray air or compressed inert gas on skin.
Do not direct an air or gas jet towards other people.
Never use air or compressed inert gas to clean
clothes.
Before working on the pump, take measures to
prevent the pump from being accidentally started.
Place a warning sign on the starting device:
"Machine under repair: do not start."
With electric drive equipment, lock the main switch
open and withdraw any fuses. Put a warning sign on
the fuse box or main switch:
"Machine under repair: do not connect."
Never clean equipment with flammable 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.
6.1 Maintenance schedule
It is recommended that a maintenance plan and
schedule be implemented, in accordance 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 packing 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 the remaining
hours before 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
6.1.1 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.
6.1.2 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.
6.1.3 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
6.2 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. Please refer to the Flowserve Mark 3
Pump Parts Catalog for more information. A copy of
this book can be obtained from your local Flowserve
sales engineer or distributor/representative.