GT4594 Turbocharger for CAT 345B / CAT 3176C Engine
Part Numbers:196-2776 720538-5002S 291-5480 1962776 196-2776 1962775 196-2775 0R7910 0R7911
Restore Full Engine Power for Your CAT 345B & 3176C with the GT4594 Turbocharger
The GT4594 Turbocharger is built specifically for Caterpillar’s 3176C engine, widely used in CAT 345B excavators. It delivers strong low-end torque, stable boost, and long-lasting durability even under the intense demands of heavy construction, mining, and earthmoving work.
Whether your machine is underpowered, consuming too much fuel, or showing signs of turbo wear, this unit is engineered to bring your excavator back to factory performance, improving both operational efficiency and productivity.
Key Features
OEM-Standard Fitment
Direct replacement for all listed CAT and Garrett part numbers. No modifications or additional parts required.
Heavy-Duty Turbine Housing
Made from high-temperature alloy to withstand long work shifts in extreme environments.
Fully Balanced Rotating Assembly
Every turbo is high-speed VSR balanced for maximum stability, reduced vibration, and increased durability.
Increased Low-End Torque
The GT4594 design improves engine responsiveness, essential for digging, lifting, and high-load operations.
Fuel Savings & Cleaner Exhaust
Optimized air compression enhances combustion, reducing smoke and fuel consumption.
Who Is This Turbo For?
This turbocharger is ideal for:
- Construction equipment fleets operating CAT 345B excavators
- Mining companies needing reliable power under heavy loads
- Equipment repair shops requiring dependable OEM-standard replacements
- Machinery distributors and parts resellers
- Contractors looking to restore machine power and reduce downtime
What Problems Does It Solve?
The GT4594 Turbocharger resolves common performance issues found on aging 3176C engines:
- Reduced digging power
- Slow acceleration or late boost
- Black smoke under load
- Excessive fuel consumption
- Whistling, whining, or grinding noises
- Oil leakage due to worn bearings/seals
- Housing cracks from thermal fatigue
Restoring the turbocharger returns your excavator to stable daily operation and improves jobsite productivity.
Technical Specifications
- Model: GT4594
- Engine: CAT 3176C
- Machine: CAT 345B
- Cooling: Oil-cooled
- Bearings: Journal bearing system
- Balance: High-speed VSR
Where This Turbo Performs Best
1. Heavy Construction Sites
Ideal for digging, trenching, and foundation operations requiring consistent torque.
2. Quarry & Aggregate Processing
Designed to handle dust, vibration, and high-load cycles.
3. Mining Operations
Built to withstand extreme temperatures and long-duty operation.
4. Earthmoving & Land Development
Provides stable and responsive power for heavy excavation.
5. Long-Hour Industrial Use
Perfect for equipment running extended hours with limited downtime.
Installation Guide
1. Preparation
- Shut down and cool the engine.
- Disconnect the battery.
- Replace engine oil and filter.
- Inspect air intake piping and replace dirty filters.
2. Remove the Old Turbo
- Detach oil feed and return lines.
- Remove exhaust manifold bolts.
- Inspect and clean all mounting surfaces.
3. Install the New Turbo
- Prime turbo with clean oil before installation.
- Use new gaskets for oil and air connections.
- Tighten all mounting bolts according to CAT torque requirements.
4. First Startup
- Idle engine for 3–5 minutes to ensure proper lubrication.
- Check for oil leaks or unusual noises.
- Avoid heavy load until operating temperature is reached.
Maintenance Tips
- Replace oil regularly and use the correct grade
- Clean or replace air filters to prevent dust damage
- Allow engine to idle before shutdown to cool the turbo
- Inspect boost pipes and clamps
- Check for proper oil pressure during operation
Proper maintenance can extend turbo life significantly.
Frequently Asked Questions
Q1: Is this turbo a direct replacement for 3176C?
Yes. If your machine uses one of the listed OEM numbers, this is a direct-fit replacement.
Q2: Does it come pre-balanced?
Yes. Every unit is high-speed VSR balanced and ready for installation.
Q3: Can this turbo be used for both CAT 345B and 3176C engine applications?
Correct — this is the proper replacement for both.
Q4: Do you offer bulk pricing?
Yes, wholesale and distributor pricing are available.
Q5: What warranty do you offer?
12-month manufacturing warranty.
About Us — Zhongke Turbocharger Co., Ltd. (Founded in 2001)
We are a specialized manufacturer of turbochargers and turbo components, supplying:
- Complete turbochargers
- CHRA/core assemblies
- Repair kits
- Compressor wheels, turbine shafts, and housings
For more than 20 years, we have served customers across Europe, the Middle East, Africa, South America, and Southeast Asia.
Our facility includes:
- Advanced CNC machining centers
- High-speed VSR balancing equipment
- Comprehensive quality control systems
- Skilled technicians and experienced engineers
We focus on precision, durability, and long-term reliability.
Meet Our Team
Engineering Department
Experts in aerodynamic design, structural strengthening, and OEM-standard modeling.
Production Department
Skilled technicians responsible for machining, balancing, and assembly.
Quality Inspection Department
Full-process inspection including material testing, balance accuracy, leakage tests, and final performance verification.
Sales & Support Department
Fast-response team offering professional advice, model matching, and after-sales support.
We believe strong products and honest service build long-lasting partnerships.
Upgrade Your CAT 345B or 3176C Engine Today
The GT4594 Turbocharger is the ideal choice for restoring lost power, boosting performance, and keeping your machine working reliably.
