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Ordernumber
Date
25-01-2015
Ref.erence
STA-STF
Version
2
Status
Final
Page
18
of
20
4 Periodic maintenance
Periodical
Act
Note
Weekly
Check temperature
When rising check the
alignment
Montly
Add 30 CC grease
between the seals
½ yearly
Check the alignment
Each docking
Measure the wear-
down
Check the alignment
Eventually overhaul
the seal
If performance is unsatisfactory, refer to chapter 5
–
Trouble
shooting.
4.1 Weekly checks
Check weekly if the temperature stays on an acceptable level and that no leaking
appears. In case of any increase in temperature or leaking starts to show then check the
alignment.
As a guidance we can say that with a water temperature of 20 degree and a engine room
temperature of 25 degrees, the temperature rise of the seal should be be no more then a
few degrees.
When a bearing sits right after the seal then the temperature cannot rise more than 10
degrees.
Any higher difference between the temperatures of 20 degrees, between inlet water and
seal housing, indicates an (potential) misalignment.
4.2 Montly checks
Add approx. 30 CC of grease between the seals. (Mobil Unirex EP, Shell Albida RL or
equal)
4.3 Half yearly maintenance
Check the alignment as per instructions (2.5 Alignment of the seal) and the original
readings.
4.4 Each docking
4.4.1
Measuring the wear-down:
Before starting the work; the wear-down on the bearing bush needs to be measured.
The method of measuring this is the same as the zero wear-down measurement as
described in section 3
For the maximum allowable bearing wear, contact the relevant classification society.
After this work, the zero wear-down measurement needs to be undertaken again.
4.4.2
Alignment check