Specializing in Genuine Quality Piston Rings and Overhaul Kits for Heavy Machinery.
At Honour Time Machinery Limited, we are the Source Factory, offering Direct-Sale Engine Parts. We support customized development for all types of Engine Cylinder Liners.
Leverage our R&D capabilities for tailor-made engine component solutions designed for international trade and superior performance.
Our featured components ensure a perfect fit and reliable performance for your machinery. Specifically focusing on the 3KR2 Engine Model No., we supply high-grade parts essential for routine maintenance and complete engine overhauls. The primary component highlighted here is the premium Piston Ring Set, designed to meet or exceed OEM specifications.
| Product Category | Model / Part No. | No-Symbol Part No. |
|---|---|---|
| Engine Model No. | 3KR2 | 3KR2 |
| Piston Ring No. | 8-94421-065-0 | 8944210650 |
NOTE: Always verify the complete Part Number including 8-94421-065-0 and its simplified form 8944210650 for accurate order placement.
| Piston Specs | Liner Specs | Ring Set Details |
|---|---|---|
| Piston No.: 3KR2P | Liner No.: 3KR2L | Ring Set No.: 8-94421-065-0 |
| Bore Diameter: 84.00mm | Inside Bore: 84.00mm | RIK No: RIK8400 |
| No. of Cyl: 3 | Bottom Outside: 87.0mm | TP No: TP8400 |
| Total Length: 75.2mm | Total Length: 155.0mm | NPR No: NPR8400 |
| Comp Height: 45.1mm | Top Outside: 87.0mm | Top Ring: 2.0K |
| Chamber Dia: 40.0mm | Flange Depth: 8.0mm | 2nd Ring: 1.5 |
| Ring Groove: 2.0K/1.5/4.0 | Surface Treatment: Phosphated | Oil Ring: 4.0 |
| Pin Size: 24x66mm | FF/SF: SF | Bushing No: BU2400 |
Honour Time Machinery Limited is your international hub for premium engine assemblies and spare parts. We specialize in components for major construction and industrial brands, including Caterpillar, Cummins, Komatsu, Isuzu, Kubota, Yanmar, and Weichai. Our extensive product catalog ensures you find exactly what you need for your machinery maintenance and repairs.
Our core offerings include Cylinder Liner sets, Piston assemblies, Piston Ring kits, Main Bearing and Con Rod Bearing sets, Thrust Washer kits, and full Overhaul Kits. Beyond standard components, we supply essential engine accessories like Diesel Pump units, Injector systems, Crankshaft, Turbocharger, Water Pump, Oil Pump, Cylinder Block, Cylinder Head, and Connecting Rod parts.
Understanding the critical components of heavy equipment is key to proper maintenance. Here are 10 essential engine and machinery terms:
Crankshaft: Converts the reciprocating motion of the piston into rotational motion. Installed Location: Bottom of the engine block. Keyword Example: Komatsu PC400-7 Crankshaft.
Piston: The moving component that is contained by a cylinder and is made gas-tight by piston rings. Installed Location: Inside the cylinder liner. Keyword Example: Caterpillar D8T Piston.
Turbocharger: Increases engine power by forcing extra compressed air into the combustion chamber. Installed Location: Exhaust manifold outlet. Keyword Example: Cummins N14 Turbocharger.
Cylinder Head: Sits above the cylinder block, closing the top of the cylinder and forming the combustion chamber. Installed Location: Top of the engine block. Keyword Example: Isuzu 6BG1 Cylinder Head.
Water Pump: Circulates coolant through the engine block and radiator to regulate temperature. Installed Location: Front of the engine, driven by belt. Keyword Example: Yanmar 4TNE94 Water Pump.
Fuel Injector: Sprays a fine mist of fuel into the combustion chamber or intake manifold. Installed Location: Cylinder head or intake manifold. Keyword Example: Weichai WP12 Fuel Injector.
Connecting Rod: Connects the piston to the crankshaft. Installed Location: Inside the engine block, between piston and crankshaft. Keyword Example: Caterpillar C9 Connecting Rod.
Main Bearing: Supports the crankshaft, allowing it to rotate smoothly within the engine block. Installed Location: Engine block main journals. Keyword Example: Kubota V3800 Main Bearing Set.
Cylinder Block: The main body of the engine that contains the cylinders and their components. Installed Location: Center of the engine assembly. Keyword Example: Isuzu 4HK1 Cylinder Block.
Thrust Washer: Controls the fore and aft movement (end play) of the crankshaft. Installed Location: Main bearing caps. Keyword Example: Cummins ISX15 Thrust Washer.
Equipment: Yanmar VIO50-6 Mini Excavator | Engine: Yanmar 4TNV88
Description of Fault: The Yanmar VIO50-6 with a Yanmar 4TNV88 engine is emitting thick, persistent white smoke, particularly during startup and low-load operation. The coolant level is dropping, and the oil dipstick shows signs of contamination (milky substance).
Root Cause & Solution: White smoke often indicates raw diesel or, more commonly, water/coolant being burned in the combustion chamber. Given the coolant loss and oil contamination, the primary suspect is a failure in the cylinder sealing components.
Inspection: Check the Cylinder Head Gasket for breaches between the water jacket and the combustion chamber/oil passages. For engines with wet liners, inspect the Cylinder Liner o-rings/seals.
Action: A complete engine overhaul is required. Replace the Yanmar 4TNV88 Head Gasket (using a genuine quality Honour Time Overhaul Kit). Pressure test the cylinder head for cracks. If the coolant is leaking past the liner seals, the Yanmar 4TNV88 Cylinder Liner seals must be replaced, and the liner itself inspected for pitting or wear.
Honour Time Machinery Limited is committed to providing premium engine assemblies and top-tier spare parts to the global market. Contact us today for reliable, manufacturer-direct pricing and export-ready quality components like the 3KR2 Piston Ring 8-94421-065-0.
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