1. Impeller, pump shaft and internal volute/casing can now be inspected for erosion, pitting and wear.
2.
If required rectify pitting or erosion in the impeller and casing with
two – part alloy epoxy putty.
3. Check main drive shaft bearings and thrust bearings for wear and replace if required.
4.
Check wear ring clearance using feeler gauges; in my day at sea it was
general practice is to replace with new rings at major overhaul.
5.
Check impeller / shaft key and key ways for damage and undue wear,
Unscrew impeller shaft securing nut and check threads are in
satisfactory condition; Re-tighten to manufacturers torque settings.
6. Give all parts a good clean removing any dirt/ medium residue before re- assembly using new parts as required.
7. Enter date of overhaul and parts renewed in the pump maintenance record card.
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