TMC 185-10 EWNA
Tamrotor Marine Compressors (TMC) TMC 185-10 EWNA — Marine Service/Control Air.
Inspector Detail
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Common issues
- Air/oil separator element clogging, causing oil carryover and reduced output pressure
- Oil cooler/aftercooler fouling reducing cooling efficiency
- Minimum pressure/check valve sticking, causing slow pressure build-up or backflow
- Water contamination in compressor oil from a cooling system leak
- Intake filter blockage reducing capacity
- Rotor bearing wear causing increased noise/vibration
- Safety/relief valve failing to lift at set pressure
- Drive coupling wear causing slip or vibration
Inspection checklist
- Check oil level and condition, test for water contamination
- Inspect/replace air intake filter per interval
- Check air/oil separator differential pressure
- Function test the safety relief valve
- Inspect drive coupling condition and alignment
- Check cooling water flow and inspect heat exchanger for fouling
- Verify automatic condensate drain/trap operation
- Check unloader/capacity control function
- Vibration and noise check against baseline
- Inspect pressure gauges and control panel alarms
Service intervals
| Oil and oil filter change | typically every 2000-4000 running hours or annually - confirm against Tamrotor manual |
| Air/oil separator element | typically every 2000-4000 running hours |
| Intake filter | clean/replace per condition, more often in dusty environments |
| Safety relief valve function test | annual |
| Major overhaul (bearings/seals) | per manufacturer interval, often in the 8000-16000h range - confirm against manual |
Typical wear limits
| Safety relief valve set tolerance | commonly required to lift within about ±3% of design pressure - confirm against the valve's own certificate |
| Rotor/bearing clearances | manufacturer-proprietary; check against the TMC overhaul manual for this model rather than a generic figure |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Air/oil separator element
- Intake filter element
- Minimum pressure valve
- Oil filter
- Drive coupling
- Safety relief valve
- Gasket/seal kit
Safety
- Stored compressed air energy
- Hot surfaces on compressor head and discharge piping
- Oil mist/fire risk if the separator fails and hot oil contacts hot surfaces
- Relief valve discharge hazard
- Rotating shaft/coupling guards must be in place before running
- Noise exposure
Class survey
Service/control air compressors are within periodic survey scope for essential auxiliary machinery. Class checks safety valve certification and testing, any associated air receiver as a separate pressure vessel item, and maintenance records against the vessel's approved planned maintenance system.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Monitor compressor oil temperature via temperature sensor gauge. Alarm should activate at 105°C with automatic shutdown at 115°C. Check oil cooler function and verify adequate cooling water flow (for water-cooled models) or air circulation (for air-cooled models).
Inspect oil filter visual condition and pressure drop indicator. Replace oil filter when receiver is empty following compressor shutdown. Check for oil color/clarity indicating age or contamination.
Verify receiver pressure gauge reading matches system design parameters. Inspect cyclone separator and multi-stage filter assembly for oil carryover or air leakage. Confirm oil-air separation efficiency via pressure differential readings.
Check TMV outlet temperature (target ~110°C in steady state). Verify TMV responds to ambient temperature changes and maintains proper delta-T. Monitor for condensation formation in discharge lines or receiver.
Inspect motor exterior for salt spray corrosion, moisture ingress, or mechanical damage. Verify motor IP55 certification still valid. Test motor insulation resistance with megohm meter (Class F motors typically require >1 MΩ at 500V). Confirm halogen-free cable integrity.
Type-general inspection and maintenance points for this equipment category — not model-specific.
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