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345-7243
Caterpillar
We are a manufacturer dedicated to the research, development, manufacturing and sales of turbochargers, serving customers across the construction machinery, power generation and marine propulsion industries worldwide.
Today we are pleased to introduce a heavy-duty turbocharger built specifically for the Caterpillar C18 engine — the 345-7243 (GTA5518 / GTA5518BS). This component decides whether a machine delivers its full power, and it sits at the heart of every owner's daily fuel bill and maintenance costs. In this introduction, we want you to not only understand the product — but to trust our expertise.
The 345-7243 is the OEM turbocharger part number for the Caterpillar C18 (18.0L) engine, built on the GTA5518 / GTA5518BS turbocharger platform.
Its working principle is simple: hot exhaust gas from the engine spins the turbine, which drives the coaxial compressor to force more air into the cylinders. More air means more complete combustion — more power, lower fuel consumption and cleaner emissions from the same displacement.
For heavy-duty machines like excavators, mining trucks, generator sets and marine propulsion systems that run under continuous load, a worn turbocharger shows up immediately: sluggish power, black smoke, rising fuel bills. Installing a healthy 345-7243 is the most direct way to bring a machine back to peak condition.
1.Durable Hot-Side Construction Built for Heavy Duty
The turbine side features a high-strength cast-iron housing (761174-0101) with an A/R of 1.58, sized for the C18's exhaust flow and back-pressure characteristics, able to endure sustained high temperature and pressure. The compressor side uses a lightweight aluminum housing (704569-0083) for fast heat rejection and lower weight. The unit stays stable under high-temperature, high-load conditions — ideal for continuous-duty mining and power-generation applications.
2.Oil-Cooled Center Housing for Longer Life
Oil-Cooled Center Housing for Longer Life，The center housing is designed for forced oil lubrication, where engine oil forms a reliable film around the high-speed bearings to carry away heat and reduce wear. Compared with water-cooled designs, the oil-cooled layout is simpler, easier to service, and meaningfully extends turbocharger life under sustained heavy load.
3. Precision-Balanced Rotating Assembly for Smooth Operation
The turbine wheel (451941-0002) and compressor wheel (449207-0032) are balanced as a complete assembly to minimize vibration, noise and shaft wear at high speed. The higher the RPM, the more critical the balance — and this is one of the key factors behind turbocharger durability.
4.Stable Boost Control Protects the Engine
Equipped with a factory-spec wastegate actuator (451764-0050), boost pressure stays stable across the rev range, preventing over-boost and surge. The engine gets both responsive power and reliable protection, even under heavy load.
5.Better Fuel Economy, Lower Emissions
Restoring the correct air-fuel ratio means fuller combustion — the visible payoff is lower fuel consumption, less black smoke and cleaner emissions. For fleet operators, every litre saved is real operating profit.
6.100% Inspected Before Shipping
Every turbocharger is fully inspected before leaving our factory — correct assembly, smooth rotation, intact interfaces. Our name is on every unit, so nobody cares more about quality than we do.
1. Construction machinery: excavators and bulldozers (e.g., CAT 349, 352 and D-series dozers with C18 power);
2. Mining equipment: haul trucks, loaders and crushing equipment;
3. Generator sets: emergency, mobile and standby power plants;
4. Marine propulsion: main and auxiliary power systems.
Whether your machine works on a construction site, in a mine, at a power station or out at sea, the 345-7243 keeps its "heart" beating strong.
As the manufacturer, we know better than anyone: a turbocharger is a "heart-level" component spinning at extreme speed — the precision of a single blade or bolt can decide thousands of hours of service life. That is why every step of our process follows strict standards.
1.Precision Casting
Housings are produced with high-quality casting processes, with strict control over material composition and casting defects to ensure heat resistance, pressure capability and dimensional stability.
2.CNC Machining
All critical mating surfaces are CNC-machined for precise fit with the engine interface and consistent assembly.
3.Dynamic Balancing
Every rotating assembly is individually dynamically balanced to ensure smooth, low-vibration, low-noise operation at high speed.
4.Final Inspection
Each unit is checked for appearance, assembly, rotation smoothness and interface integrity before it is packed and shipped.
- Packaging: Export-standard, moisture-proof and shock-resistant packaging for safe long-distance shipping;
Shipping: [Door-to-door delivery to most countries worldwide, It will be delivered to you as quickly as possible，For bulk / large orders, shipping is quoted separately — please contact us];
1. Direct from the factory: no middlemen — better pricing and more controllable lead times;
2. Specialist focus: turbochargers are all we do, and we do them exceptionally well;
3. Strict quality control: casting, machining, balancing and inspection — every layer is checked;
4. Reliable service: pre-sale selection, responsive sales, and follow-up after-sales support;
5. Long-term partnership: OEM customization and stable supply for lasting cooperation.
A turbocharger may be small, but it is the soul of a machine's power. We believe that if you build products with care and do business with honesty, customers will stay. If you are looking for a reliable partner for the 345-7243 turbocharger, please feel free to reach out — let our products do the talking.
