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WARNING : electrical equipments that must be powered on during the
maintenance work or pressurized equipments must be clearly identified.
End of maintenance operations : all protective parts that were removed
before maintenance should be reinstalled and all security devices should
be reactivated. Pump surrounding area should be cleaned.
9.2 MAINTENANCE
INSPECTIONS SCHEDULE
It is recommended to build up a maintenance and inspection plan
to ensure a reliable use of pump and to reduce malfunctions
hazards. Following check points should be included in this maintenance
plan :
Check state and working of securities and auxiliary systems,
Check and adjust gland packing (if any) for visible leakage,
Check for any leaks from pump gaskets and flanges seals,
Check lubricant level and aspect of oil (oil lubricated bearings) in
bearing bracket,
Check running time and replacement frequency of lubricants / ball
bearings,
Check the bearing bracket housing surface temperature on ball
bearings area,
Check dirt and dust is removed from pump and motor ,
Check coupling alignment (depending on pump variant),
Check if there is unusual noises (cavitations, hissing, purring, ...) or
excessive vibrations.
Check point
State of the auxiliary systems
Motor
Shaft sealing
Leaks from gaskets
Oil level and grease quantities
Lubricants (ball bearings)
Bearings surface temperature
Cleaning
Alignment and coupling wear
Noise, vibrations
Anchoring quality
Those frequencies are given for information only. They could be used as
a basis to the creation of a maintenance plan when starting a new
installation. Depending on installation conditions and use, the
periodicity will be shortened or prolonged.
9.2.1
LUBRICATION
Recommended oil lubricants :
Bearing temp. < 80°C
1500 RPM
Type acc. to
CL68
DIN 51517
Kinematic
viscosity @
61,2 to 74,8
50°C
[mm²/s]
Corresp. Oil
SAE 20 et 20W
type
Bearing bracket size /oil quantity :
Bearing bracket size
45
55
65
75
9.2.1.1 Oil change intervals
The bearing bracket is delivered without the first oil load. Before
start up proceed with oil filling through the upper filling port up to
the indicated oil level indicator.
AND
PERIODIC
Periodicity
Depends on equipment type. See
dedicated equipment IOM
See manufacturer IOM
Weekly
Weekly
Daily / Weekly / Monthly
Replacement frequency according ball
bearing type and shaft speed
Monthly
Twice a year
Twice a year
Monthly
Yearly
Amb.
> 1500
Temp.
RPM
< 0°C
CL46
CL22
41,8 to
19,8 to
50,8
24,2
SAE
10W
Oil ( liters )
0,8
1,5
2,0
2,3
A constant level oiler is available as an option. When oil level
decreases in the bearing housing, air comes in the auxiliary oil tank
and allows oil to go inside the bearing housing. Oil will run in the bearing
housing until optimum level "N" is reached inside.
In this case, first filling of bearing housing is done through the upper
port fitted with a plug.
Level is reached when oil appears in the elbow of the fitting (G). (to
check, rotate tank). Then fill in the auxiliary oil tank and put back in its
vertical position. Always check that oil tank is filled with oil while the
pump is running.
D = Oil tank
E = Fitting
F = Oil tank filling port
G = Elbow of tank fitting.
When assembling the oil tank on the pump, make sure it is
perfectly vertical (pump is horizontal).
Oil change intervals :
If ball bearings are new, oil load should be replaced after 200 hour of
running time, the renewal is as indicated below.
Light duty, bearing temperature below 5°C, no risk of pollution : once a
year.
Standard duty or heavy duty, bearing temperature above 50°C, or
pollution risk : every 6 months.
9.3 DISMANTLING AND RE‐ASSEMBLY
9.3.1
DISMANTLING
Make sure that electric power is disconnected and could not be
switched on again by fault during maintenance operations.
• Drain the piping at least between the isolating valve on the suction and
discharge side.
• If necessary disconnect any measuring sensors and gauges.
• Remove drain plug and drain the pump casing.
• If necessary, remove connections to mechanical seal auxiliary piping.
• Drain oil from bearing bracket and remove constant level oiler to avoid
damages during following operations.
• Pump casing can be kept fastened to pipe work.
• Remove motor fastening screws and move the motor rearward so that
there is enough space to remove the back‐pull‐out assembly.
When using a coupling with spacer part, it is not necessary to
move the motor rearward.
• Dismantle coupling guard, half coupling on pump side.
1. Mark the position of the parts in relation to each other with a color
pen or a scribing tool.
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