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5 Maintenance
5.2
Maintenance schedule
It is advisable to install pressure gauges on both sides of the pump so that any problems within the pump/pipework can
be monitored.
Maintenance schedule
Your weekly schedule should include:
-
Checking the oil level in the gearcase with the pump stationary.
-
Checking the seals for leakage.
-
Checking the oil seals for leakage.
-
Check pumping pressures.
In certain operational circumstances the pump will pose a thermal hazard and as such should not be touched during operation.
After shutdown the pump unit should be allowed time to cool.
Oil should be changed every 3000 hours of operation or a period of 2 years, whichever is the soonest.
Recommended Spare Parts
Part description
Quantity
Lip seal drive end
1
O-ring rotorcase cover
1
Lip seal gland end
2
O-ring rotor sealing shaft end
2
O-ring rotor sealing nut end
2
The table shows recommended spare parts
that should be retained within your maintenance
schedule.
Primary seals
2
Rotor nut O-ring Seal Replacement Interval
It is recommended that the rotor nut O-ring seal is replaced every 12 months to maintain a bacteria tight seal.
Rotor Nut Seal Inspection
Periodically inspect the rotor nut O-ring seal for any discoloration, nicks, or cracks. If any of the defects above are noticed,
the O-ring seal must be replaced. Inspection and replacement refer to the seal replacement procedure below.
Seal Replacement Procedure
1. Remove rotor case cover (see 5.3 Dismantling, step Step 1).
2. Undo rotor nuts and ensure components are dry before servicing.
3. With a penlight, inspect rotor nut blind tapped hole for contamination. If soiled, refer to cleaning procedure below.
4. Remove and discard rotor nut O-ring seal.
5. Fit new rotor nut O-ring seal.
6. Fit rotor nut and use a torque wrench to tighten to correct torque value (see table 6.1.3 on page 37).
7. Fit the rotor case cover.
Cleaning Procedure for Soiled Rotor Nut Tapped Hole
1. Remove rotor nut from the shaft.
2. Submerge and soak nut for 5 minutes in COP tank with 2% caustic wash.
3. Scrub the hole with internal thread vigorously by plunging a clean sanitary bristle pipe brush in and out of the hole
for two minutes while submerged.
4. Soak nut in acid sanitizer for 5 minutes, and then scrub the hole again with the pipe brush for two minutes.
5. Rinse well with clean water and blow-dry blind tapped hole with clean air.
6. Swab test the inside of the tapped hole to determine cleanliness.
7. Should the swab test fail, repeat steps 2 thru 6 above until swab test is passed.
Should swab testing continue to fail, or time is of the essence, install a new rotor nut.
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Содержание SRU series
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