Direct Factory Source & Professional Manufacturer: Global Export for Engine Cylinder Liners
Featured Custom Solutions: Caterpillar 320C Cylinder Liner, Komatsu PC200-8 Liner Kit, Isuzu 4HK1 Engine Sleeve, Cummins 6BT Liner Kit.
Product Overview and Technical Specification
Are you facing rotation delays or unusual noise in your Caterpillar 320C Excavator? The Swing Motor Main Valve with Part Number 171-0030 (also searched as 1710030) is the critical component designed to regulate hydraulic pressure and ensure smooth revolving motion. At Honour Time Machinery Limited, we provide high-quality Chinese alternative parts that meet or exceed original equipment standards, solving common hydraulic drift and swing power loss issues.
| Specification Item | Details |
|---|
| Model NO. | CAT 320C / 171-0030 |
| Application | Excavator Swing System |
| Certification | ISO9001 Standard |
| Condition | 100% Brand New High Quality Replacement |
| Part Number | 171-0030, 1710030 |
| Product Name | Main Valve / Swing Relief Valve |
| Transport Package | Standard Export Carton Box |
| Origin | China Direct Factory |
| Production Capacity | 5000 PCS / Year |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | Express: DHL, Fedex, EMS, UPS or by Air/Sea |
Professional Engine Parts Supply by Honour Time Machinery Limited
Our core expertise lies in providing robust engine solutions including Cummins Engine Assembly, Komatsu Overhaul Kits, Caterpillar Spare Parts, Isuzu Liner Kits, Kubota Components, Yanmar Pistons, and Weichai Engine Parts. We specialize in high-durability Cylinder Liners, Pistons, Piston Rings, Main Bearings, Connecting Rod Bearings, Thrust Washers, Full Gasket Sets, Fuel Injection Pumps, Injectors, Crankshafts, Turbochargers, Water Pumps, Oil Pumps, Cylinder Blocks, Cylinder Heads, and Connecting Rods.
Featured Product Categories:
| Liner Kit | Piston | Piston Ring | Gasket Kit |
| Gasket Head | Crankshaft | Valve Guide | Nozzle |
| Bearing | Pressure Switch | Flameout Solenoid | Monitor |
| Radiator | Main Valve | Belt | Engine Bearing |
| Cylinder Block | Valve Seat | Accelerator Motor | Transmitter |
Engine Compatibility List
We provide a wide range of engine models for major brands. Our inventory includes Caterpillar 3116 Engine Parts, Komatsu 6D102 Overhaul Kits, and Isuzu 6HK1 Fuel Injectors.
| Brand | Supported Models |
|---|
| CATERPILLAR | 3114, 3116, C4, C6, 3064T, S6K, C7, C-9, C13 |
| KOMATSU | 3D82, 3D84, 4D105, 6D95, 6D108, 6D110, 4D84, 4D95, 6D102, 6D105, 6D114, 6D170 |
| ISUZU | 3LD1, 4LE1, 4BG1, 4HK1, 6SD1, 6WG1, 4LE2, 4JB1, 6BG1, 6HK1, 6WF1 |
| KOBELCO | J05E, 6D34T, 6D16, J08E, 6D22T, 6D24T, 6D16T, 6D34 |
| MITSUBISHI | 4D34, 4D24, K4M, S3Q2, 6D16, 6D24, S4KT, 6D40 |
| YANMAR | 4D88E, 4TNE84, 4TNV88, 4TNV94L, 4TNE88, 4TNE94, 4TNV98, 4TNV106 |
| VOLVO | D6D, D6E, D9E, D12D, D7D, D7E, D12E, D16D |
| CUMMINS | QSB6.7, QSM11-C, B5.9-C, B3.9-C, QSM11, C8.3-C |
Expert Knowledge: Construction Machinery Components
Caterpillar C7 Fuel Injector: Installed in the cylinder head of a CAT 324D excavator, it atomizes fuel for combustion.
Komatsu 6D107 Turbocharger: Located on the exhaust manifold of a PC200-8 excavator to increase engine power through air compression.
Isuzu 6HK1 Water Pump: Mounted on the front of the engine block in a Hitachi ZX200-3 to circulate coolant and prevent overheating.
Cummins QSB6.7 Piston: Moves within the cylinder of a Liugong 922E excavator, converting gas pressure into mechanical force.
Kubota V2403 Glow Plug: Threaded into the cylinder head of a Bobcat S185 skid steer to assist in cold weather starting.
Yanmar 4TNV98 Crankshaft: The main rotating shaft in an engine, found in a Takeuchi TB290 mini excavator.
Weichai WD10 Cylinder Head: Sits on top of the engine block of a Shantui SD16 bulldozer, housing valves and injectors.
Caterpillar 320C Swing Relief Valve (171-0030): Installed in the swing motor hydraulic circuit to protect the system from pressure spikes.
Komatsu PC300-7 Main Control Valve: The central hub of the hydraulic system that directs oil to various actuators.
Isuzu 4JJ1 Oil Pump: Located in the engine sump of a Case CX130B to provide lubrication to moving parts.
Case Study: CAT 320C Swing Motor Failure & Solution
Problem Description: A Caterpillar 320C excavator exhibited "Swing Drift" where the upper structure would not stop immediately after releasing the control lever. This posed a safety risk and reduced precision during operation.
Technical Diagnosis: Upon inspection, the Swing Motor Main Valve (171-0030 / 1710030) was found to have internal wear and a weakened spring, leading to pressure leakage.
Maintenance Solution: Replace the faulty valve with our High-Quality Replacement 171-0030. We also recommend checking the hydraulic oil filters and ensuring the swing bearing is properly lubricated every 500 working hours to prevent contamination of the new valve.
5 Key Product Features
Optimized for CAT 320C: Specifically engineered for the Caterpillar 320C swing motor system for perfect fitment.
Durable Material: Manufactured with high-strength alloy steel to withstand extreme hydraulic pressures and heat.
Precision Engineering: Eliminates swing drift and hydraulic lag, restoring original excavator performance.
Cost-Effective: A premium Chinese alternative that offers 100% functionality at a fraction of the cost.
Heavy-Duty Use: Designed for rigorous construction environments and high-frequency rotation tasks.
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About Honour Time Machinery Limited: We are a leading global supplier of high-precision engine assemblies and components for Cummins, Komatsu, Caterpillar, Isuzu, and Yanmar. Based in China, we specialize in factory-direct export of premium overhaul kits and hydraulic parts for the construction and mining industries.
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