SA50T (Mobile Fire & Emergency)

Common issues

• Hatz diesel engine hard starting after prolonged storage - fuel system air lock or stale fuel
• Recoil/electric starter failure from infrequent testing
• Pump seal leakage after standing idle, causing loss of prime
• Suction strainer clogging, reducing flow
• Fuel filter/injector fouling from water contamination or stale diesel
• Corrosion of the pump casing/impeller from saltwater service without adequate flushing
• Coupling/drive shaft wear between engine and pump
• Loss of self-priming capability from worn seals or air leaks at suction connections

Inspection checklist

• Test-run monthly per SOLAS/flag requirement and record run time to full pressure
• Check the starting system (battery/recoil) and record start performance
• Inspect the fuel system for water/contamination and drain the water trap
• Check suction hose, strainer, and couplings for damage
• Verify discharge pressure/flow against nameplate rating (24 m³/h at 26 mLC)
• Inspect the pump seal for leakage after running
• Check engine oil level/condition
• Inspect the exhaust system for blockage or leaks
• Confirm the stowage location is accessible and the pump is readily deployable
• Check fuel tank level and fuel freshness

Service intervals

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

Critical spares

• Hatz engine fuel filter
• Hatz engine oil filter
• Pump mechanical seal
• Suction strainer
• Starter battery (electric start variant)
• Recoil starter cord/assembly
• Impeller (if worn or damaged)

Safety

• Hot exhaust surfaces during and after running
• Diesel fuel handling fire risk
• Manual handling injury risk - the unit weighs approximately 50 kg and is carried/rigged manually
• Carbon monoxide risk if run in an enclosed space without ventilation

Class survey

Class/flag surveys check that the portable pump is readily accessible, starts within the required time, and that monthly test records are maintained in the deck log. Where this unit serves a SOLAS emergency/portable fire pump role, requirements on capacity and independence from the main power source apply.

Estimated lifetime: As an emergency-use portable pump run mainly for monthly tests, engine hours accumulate slowly; the Hatz diesel driver typically reaches several thousand hours between major overhauls under this light duty, but real service life depends heavily on storage conditions and test frequency.