RU110

Common issues

• Compressor fouling (reduced air flow, surging)
• Turbine-end deposits (reduced efficiency, increased exhaust back pressure)
• Bearing wear (increased axial/radial play, vibration, oil leakage)
• Rotor imbalance (excessive vibration, bearing damage, potential for rotor contact)
• Oil leakage from bearing housing or oil supply/drain lines
• Air filter clogging (reduced air intake, increased pressure drop)
• Exhaust gas leakage from casing joints or flanges
• Foreign object damage (FOD) to compressor or turbine blades

Inspection checklist

• Visual inspection of compressor impeller for fouling, damage, or rubbing marks.
• Visual inspection of turbine blades for deposits, erosion, or damage.
• Check bearing axial and radial play (if accessible, typically with a dial gauge or by hand-feel for excessive movement).
• Inspect for oil leakage around bearing housing, oil supply/drain lines, and casing joints.
• Check condition of air filter element; clean or replace as necessary.
• Inspect exhaust gas casing and flanges for signs of leakage (soot marks).
• Verify security of all mounting bolts and connections (air, exhaust, oil).
• Check condition of compressor drain line for blockage and proper function.
• Listen for abnormal noises or vibrations during operation (if engine is running).

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

• Complete bearing cartridge/set (thrust and journal bearings)
• Gasket set for overhaul (casing, oil lines, air/gas connections)
• O-rings and seals (especially for oil passages)
• Air filter element
• Impeller nut (often single-use)
• Lubricating oil filter element (if applicable to turbocharger's oil system)

Safety

• High temperature surfaces (exhaust casing, turbine housing) – risk of burns.
• High-speed rotating parts (rotor) – potential for severe injury if guards are removed or casing integrity is compromised.
• Pressurized air and exhaust gas systems – ensure proper depressurization before maintenance.
• Noise levels – wear hearing protection during operation or inspection in close proximity.
• Hot oil spray – risk during bearing failure or improper disassembly of oil lines.

Class survey

Class surveyors will typically review maintenance records, verify the last major overhaul date, and inspect the general condition of the turbocharger. They will check for obvious oil/exhaust gas leakages, excessive vibration, and the security of mounting. Bearing play may be checked if accessible or if concerns arise. Confirmation of critical spare parts being onboard and readily available is also a common check. Compliance with manufacturer's service intervals and classification society requirements for annual inspections is paramount.

Estimated lifetime: 12,000 - 24,000 running hours before requiring a full workshop overhaul and potential component replacement (e.g., rotor assembly, casings) to extend service life.