Unlocking Peak Performance: Premium Komatsu S6D125 Piston Kit Featuring Piston 6152-31-2112, Liner 6150-21-2221, and Ring Set 6150-31-2030 (6150312030)
Custom Engine Parts Development & Direct Factory Sales
As a reliable Source Factory, Honour Time Machinery Limited offers full-service Customization and Development for various engine components, including Cylinder Liners, Pistons, and Piston Rings. Whether you need modifications for S6D125 engine cylinders or full production runs for Aftermarket Export, we guarantee premium quality directly from the manufacturer. Partner with us for your heavy duty engine parts needs.
The Power of Precision: Honour Time Engine Solutions
Welcome to Honour Time Machinery Limited, your dedicated source for high-quality diesel engine overhaul parts and engine assembly components. Our featured product set for the robust Komatsu S6D125 engine guarantees optimal performance and longevity for your heavy equipment. We specialize in providing the complete combustion chamber solution, ensuring reliability for demanding applications. We stock both the hyphenated part number 6150-31-2030 and the quick reference 6150312030 piston ring set, alongside the critical Piston 6152-31-2112 and Cylinder Liner 6150-21-2221. We are experts in providing Komatsu excavator engine parts and other heavy equipment engine rebuild kits.
Detailed Specifications for Komatsu S6D125 Components
We provide meticulously checked specifications for our Komatsu S6D125 overhaul parts to ensure perfect fitment and function. Here are the key technical details for the Piston, Liner, and Ring Set:
| Specification | Piston 6152-31-2112 | Cylinder Liner 6150-21-2221 | Ring Set 6150-31-2030 |
|---|---|---|---|
| Engine Model | S6D125 | S6D125 | S6D125 |
| Bore Diameter | 125.0 mm | 125.0 mm | 125.0 mm |
| No. of Cylinders | 6 | 6 | 6 |
| Total Length | 129.5 mm | 250.0 mm | N/A |
| Comp Height (CH) | 79.2 mm | N/A | N/A |
| Chamber Dia | 70.0 mm | N/A | N/A |
| Pin Size | 50.0 mm | N/A | N/A |
| Ring Groove (T/2nd/Oil) | 3.0 / 2.5 / 4.0 mm | N/A | N/A |
| Inside Bore | N/A | 125.0 mm | N/A |
| Top Outside (Flange) | N/A | 140.0 mm | N/A |
| Flange Depth | N/A | 10.0 mm | N/A |
| Surface Treatment | Molybdenum Coating | Honing Finish | Chrome Plated |
| Top Ring | N/A | N/A | 3.0 mm (KE) |
| 2nd Ring | N/A | N/A | 2.5 mm (Taper) |
| Oil Ring | N/A | N/A | 4.0 mm (Coil Expander) |
| RIK No. / TP No. / NPR No. | N/A | N/A | Cross Reference Available |
Essential Engine Components and Expert Knowledge
Beyond the specific Komatsu S6D125 piston and 6150-21-2221 liner, Honour Time Machinery Limited supplies a vast inventory of reliable aftermarket engine parts for major global brands. Our main product line includes Engine Assemblies and all associated spare parts for Cummins, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai engines. Key components we offer include Crankshaft Bearings, Connecting Rod Bearings, Thrust Washers, Engine Overhaul Gasket Kits, Fuel Injection Pumps, Injectors, Crankshafts, Turbochargers, Water Pumps, Oil Pumps, Cylinder Blocks, Cylinder Heads, and Connecting Rods.
Long-Tail Keywords for Enhanced Search Visibility:
Technical Glossary and Maintenance Insights
10 Essential Construction Machinery Component Definitions:
Cylinder Head Gasket (Sealing): Placed between the Cylinder Head and Cylinder Block to seal the combustion chamber. Example: Cummins QSB6.7 Cylinder Head Gasket.
Connecting Rod (Power Transmission): Links the Piston to the Crankshaft. Example: Caterpillar C7 Connecting Rod.
Crankshaft Main Bearing (Support): Supports the Crankshaft within the Cylinder Block. Example: Komatsu PC450-8 SAA6D125E Main Bearing.
Oil Cooler Core (Cooling): Located near the oil filter housing, it cools the engine oil using coolant. Example: Isuzu 4HK1 Oil Cooler Core.
Injector Nozzle (Fuel Delivery): Installed in the Cylinder Head, it sprays fuel into the combustion chamber. Example: Kubota V2403 Injector Nozzle.
Rocker Arm (Valve Train): Mounted on the Cylinder Head, it transfers motion from the pushrod to open the valves. Example: Yanmar 4TNV94 Rocker Arm.
Turbocharger Compressor Wheel (Air Intake): Located within the Turbocharger housing, it compresses intake air. Example: Weichai WP12 Turbocharger Compressor Wheel.
Camshaft Bushing (Support): Supports the rotation of the Camshaft within the Engine Block. Example: Cummins B5.9 Camshaft Bushing.
Water Pump Impeller (Cooling): Inside the Water Pump housing, it circulates coolant through the engine block. Example: Caterpillar D6T Water Pump Impeller.
Hydraulic Pump Seal Kit (Sealing): Installed in the main hydraulic pump (not engine), preventing oil leaks. Example: Komatsu PC200-7 Hydraulic Pump Seal Kit.
9. Construction Machinery Fault and Resolution Example:
Fault: Komatsu PC300-7 excavator (S6D114E engine) experiences sudden, excessive blue smoke from the exhaust and a noticeable drop in engine power, accompanied by high oil consumption.
Diagnosis and Solution: This often indicates a failure in the piston and liner area, specifically worn Piston Rings or a scored Cylinder Liner, allowing engine oil to enter the combustion chamber. The solution is a full engine top-end overhaul, replacing the piston, liner (like the 6150-21-2221 style), and piston ring set (6150312030) with high-quality, precision-matched components from a trusted supplier like Honour Time to restore compression and minimize oil blow-by.
Connect with Honour Time for Your Global Parts Supply
Ready to secure premium, factory-direct engine components? As an Export-focused Manufacturer, Honour Time Machinery Limited is dedicated to providing reliable aftermarket engine parts globally. Contact us today for wholesale pricing and expert support on our full range, including Caterpillar overhaul parts, Cummins crankshafts, and our featured Komatsu 6152-31-2112 Piston.

