LT 100-30 KE

Common issues

• Valve plate/reed valve wear or breakage on the high-pressure stages, causing capacity loss and higher discharge temperature
• Piston ring and rider ring wear leading to increased oil carry-over into the compressed air
• Intercooler/aftercooler fouling on the water side, reducing cooling and causing high stage discharge temperatures
• Moisture/condensate drain blockage or failure, allowing water carry-over into the starting air receivers
• Crankcase oil contamination or degradation from sustained high operating temperature
• Safety/relief valve seat leakage or failure to lift at the set pressure
• Low-pressure stage cylinder liner wear from dust ingress when intake filtration is neglected

Inspection checklist

• Check discharge temperature of each stage against the maker's normal operating range
• Function-test the safety relief valve at each stage for correct set pressure and free lift
• Drain and check condensate separators/traps for correct operation
• Check crankcase oil level and condition, and change per schedule
• Inspect the intake air filter for cleanliness and damage
• Check valve plates for wear, carbon deposits or breakage during scheduled overhaul
• Measure cylinder liner wear at low- and high-pressure stages
• Verify cooling water flow and jacket/intercooler condition
• Function-test the automatic drain and unloading system
• Check foundation bolts and listen for unusual noise/vibration as an early bearing-wear sign

Service intervals

Critical spares

• Valve plate kits, per stage
• Piston rings and rider rings, per stage
• Cylinder liners, low- and high-pressure stage
• Safety/relief valve sets
• Condensate drain trap/solenoid valve
• Intercooler/aftercooler element
• Oil filter and, if fitted, oil pump repair kit

Safety

• Stored high-pressure air energy up to 30 bar - always depressurise and lock out before opening any stage or fitting
• Hot surfaces on cylinder heads and intercoolers during and after running
• Relief valves must never be blocked or have their set pressure altered without proper testing
• Risk of an oil-air ignition event (diesel effect) in the high-pressure stage if lubrication or cooling is neglected

Class survey

Starting air compressors are typically covered under Continuous Survey Machinery if enrolled; class wants safety valve test records and evidence of periodic internal inspection. The starting air receivers themselves are separately class-surveyed pressure vessels.

Estimated lifetime: Marine starting air compressors of this reciprocating, water-cooled class typically run 40,000-60,000 hours before major overhaul, with valve and piston ring sets renewed at intermediate intervals - actual life depends heavily on duty cycle and maintenance.