20R-9517 Piston Pump CAT Excavator Main Pump 320 326GC 323GC 323
The 20R-9517 piston pump is the core main pump component of the Cat excavator's hydraulic system. Constructed from high-strength steel and using precision-machined pistons, it features a compact design, high pressure resistance, and wear resistance. It is responsible for converting engine power into stable hydraulic pressure, providing power for the excavator's swing, travel, and bucket movements.
| Part Number | 20R-9517 |
| Part Type | Main Piston Pump |
| Application Equipment | 320 326GC 323GC 323 Series Excavators |
| Pump Type | Variable Displacement Piston Pump |
| Material | High-strength steel and alloy materials |
| Function | Provides stable hydraulic pressure and flow, enabling hydraulic motion control |
Features and Advantages
High-efficiency piston pump structure: The variable displacement design provides efficient hydraulic flow, ensuring rapid hydraulic response.
Durable and reliable: The steel pump body and high-quality components guarantee wear resistance, high pressure resistance, and fatigue resistance.
Hydraulic system stability: Provides continuous and stable pressure, improving the accuracy and efficiency of the overall machine's hydraulic operations.
Our Product Range | Engine Rebuild Kit | Turbochargers | Engine Diesel Pumps | Engine Controllers (ECU) |
| Cylinder Blocks | Cylinder Heads | Water Pumps | Injectors |
| Starter Motors | Filters | Other Engine Accessories | Excavator Hydraulic Pumps |
| Swivel Components | Distributor Valves | Travel Motor Assemblies | Chassis Components and Other Accessories |
Pump and Pump Base Interface Close-up, showing the mounting interface and threads
20R-9517 Main Piston Pump Overall Appearance
20R-9517 Piston Pump Side View
20R-9517 Piston Pump Original Replacement Part
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Frequently Asked Questions
Q1: What is your main products?
A1: We are specialized in the excavator engine spare parts, for example Main cylinder block, cylinder head, crankshaft, Engine assembly, piston, cylinder liner, piston ring, camshaft, connecting rod, oil pump, water pump, valve series products, movement, etc. almost all parts of the entire engine.
Q2: Do you test all products before shipping?
A2: Yes, we conduct 100% testing before shipping.
Q3: Which engine models is this Main Piston Pump compatible with?
A3: This product is designed for specific diesel engine models. If you can provide the engine model or original part number, we can confirm compatibility before shipping to avoid incompatibility issues.
Q4: Can you provide cross-reference information for OEM part numbers?
A4: Yes, we support original part interchange. Please provide the original part number, and we will verify the replacement part accordingly.
Q5: What should I do if there is a problem with the product?
A5: Our products undergo professional testing and are of very stable quality. If you do find any problems, please contact us. We have a professional after-sales team to help you solve the problem.
Why Choose Us?
• Over 20 years of experience specializing in construction machinery, engines, and parts – with stable experience supplying mainstream brands and models.
• Extensive experience in model matching enables us to provide customers with accurate parts selection, reducing procurement risks.
• A long-term, stable, and reliable supply system ensures reliable product sourcing and meets continuous procurement needs.
• For product information or quotations, our professional team will provide you with detailed answers immediately upon receiving your request.
