Turbocharger · Turbochargers
The IHI AT14 is a medium‑speed marine diesel turbocharger from the AT/RH series, featuring a compact axial‑flow design that delivers high boost efficiency for 4‑stroke main propulsion engines.
Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.
What our service work and the manufacturer documentation say about keeping this model running.
Servicing per the manufacturer's manual and classification society requirements. Annual inspection at class survey. Stock spare parts as specified by the manufacturer.
| Minor Inspection (visual, cleaning of compressor/turbine side) | 500-1000 running hours |
|---|---|
| Bearing Inspection/Replacement | 4,000-8,000 running hours or annually, whichever comes first |
| Major Overhaul (full disassembly, cleaning, balancing, replacement of wear parts) | 12,000-18,000 running hours or every 3-4 years |
| Rotor Balancing | As required, typically during major overhaul or if excessive vibration is detected |
| Rotor Axial Play (Thrust Bearing Clearance) | New: 0.10 - 0.20 mm; Max Allowable: 0.30 - 0.40 mm |
|---|---|
| Rotor Radial Play (Journal Bearing Clearance) | New: 0.05 - 0.10 mm; Max Allowable: 0.15 - 0.20 mm |
| Turbine Blade Tip Clearance | Manufacturer specific, typically 0.5 - 1.5 mm. Excessive rubbing indicates bearing wear. |
| Compressor Blade Tip Clearance | Manufacturer specific, typically 0.5 - 1.5 mm. Excessive rubbing indicates bearing wear. |
| Bearing Surface Condition | No scoring, pitting, or excessive discolouration. Smooth and uniform surface required. |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
During annual or special surveys, the class surveyor will typically check: 1. Operational Test: Verify proper operation, alarm functions (e.g., high exhaust temperature, low oil pressure if integrated). 2. Safety Devices: Check over-speed trip mechanism (if fitted or engine-integrated) and its functionality. 3. Casing Integrity: Visual inspection for cracks, deformation, or signs of exhaust gas/oil leakage. 4. Mounting & Foundations: Ensure secure mounting and absence of excessive vibration. 5. Exhaust Gas System: Inspect expansion bellows, insulation, and connections for leaks. 6. Lubricating Oil System: Verify oil supply pressure, temperature, and drain flow. 7. Maintenance Records: Review logbooks for service history, bearing replacements, and overhaul dates. 8. Spare Parts: Confirm critical spares are onboard as per Class/ISM requirements. 9. Overall Condition: General assessment of cleanliness, absence of leaks, and signs of distress.
Estimated lifetime: 50,000 - 80,000 running hours (before major component replacement or unit overhaul/replacement, assuming proper maintenance)
IHI AT-series parts are frame and execution specific; order by nameplate and engine application.
Free of charge — send us your request for IHI Corporation equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, IHI Corporation first.
Tell us what you need for this IHI Corporation AT14 — a part, a service call, a second opinion. Are you IHI Corporation? Claim this brand page.
Service engineer? Write the day report for this AT14 in OceanSphere Work — photos, hours and parts, as a PDF for the owner. Try it free for 14 days →
Yes. Specifications, documents and service notes for this model are readable without an account. An account adds saved searches and requests, nothing is taken away.
Yes. Tell us the manufacturer, the model and what you need — a person reads every request and replies by e-mail.
Send us the nameplate or the correct value. We check it against the manufacturer datasheet or class-society record and update the page.