Modular S S80-70-275N

Common issues

• Loss of self-priming performance due to a worn priming valve or air-release mechanism
• Mechanical seal wear and leakage
• Impeller wear or damage from debris commonly found in bilge water
• Clogging by rags or solid debris reducing flow
• Coupling misalignment leading to vibration and premature bearing wear
• Reduced capacity from a partially blocked suction strainer

Inspection checklist

• Self-priming time test against the baseline figure
• Mechanical seal leakage check
• Suction strainer condition check
• Capacity test against the pump curve
• Non-return valve function check
• Bilge alarm/level switch function test on the associated system
• Coupling alignment check

Service intervals

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Mechanical seal kit
• Impeller
• Wear plate
• Priming/non-return valve
• Coupling element

Safety

• Bilge discharge must respect MARPOL Annex I oil content limits - bypassing the oil content monitor is a serious violation, not a maintenance shortcut
• Pressurized suction/discharge lines - isolate before opening
• Entrapment risk at the coupling guard if removed for maintenance and not refitted

Class survey

Bilge system function, including this pump's capacity, is tested at survey; the oil discharge monitoring equipment and its remote/local control are checked as part of the same survey scope.

Estimated lifetime: Self-priming bilge pumps often see intermittent rather than continuous duty; major overhaul intervals are commonly quoted in the range of 15,000-30,000 running hours or per the maker's/company PMS recommendation - confirm against the specific maker's data