Product Details
Product Overview
This high-quality diesel engine piston ring set is a critical component for Isuzu 4HK1 and 6HK1 engines, widely used in heavy-duty excavators, construction machinery, and commercial trucks. The set includes part numbers 8-98023-526-0 and 8-98023-525-0, ensuring precise fitment and reliable sealing performance for demanding working conditions.
Manufactured to meet or exceed OEM specifications, this piston ring set is designed for engines that power popular excavator models such as the Hitachi ZX200, ZX210, and ZX240 series, as well as various Isuzu-powered industrial equipment. Each ring is engineered to withstand high temperatures, extreme pressures, and continuous heavy loads, making it an ideal replacement for worn or damaged piston rings during engine overhaul or repair.
Key Features & Benefits
- OEM Grade Quality: Manufactured to match Isuzu original specifications for 4HK1 and 6HK1 engines, ensuring direct replacement without modifications.
- Superior Compression: Precision-ground ring surfaces provide optimal cylinder wall contact, maximizing compression and reducing blow-by for improved engine performance.
- Extended Durability: Constructed from high-strength alloy steel with advanced surface treatment, offering excellent wear resistance and longer service life in harsh excavator environments.
- Oil Control Efficiency: Specially designed oil rings minimize oil consumption while maintaining proper lubrication, reducing emissions and operational costs.
- Complete Set: Includes all necessary rings (compression, intermediate, and oil rings) for a full piston set, simplifying inventory management for repair shops and parts distributors.
- Heat Resistance: Engineered to maintain dimensional stability under extreme thermal loads common in heavy equipment operation.
Technical Specifications
| Specification |
Details |
| Part Number |
8-98023-526-0, 8-98023-525-0 |
| Engine Model |
Isuzu 4HK1, 6HK1 |
| Product Type |
Piston Ring Set |
| Material |
High-Strength Alloy Steel |
| Surface Treatment |
Chrome Plating / Phosphate Coating |
| Ring Composition |
Top Compression Ring, Second Compression Ring, Oil Control Ring |
| Compatible Bore Size |
Standard (Oversize options may be available) |
| Application |
Excavator Engine, Construction Machinery |
OEM Cross-Reference
This piston ring set is directly interchangeable with the following OEM part numbers:
- Isuzu OEM: 8-98023-526-0, 8-98023-525-0
- Hitachi OEM: 4244880, 4244881 (where applicable)
- Alternative Numbers: 8-98023-524-0, 8-98023-527-0 (related variants)
Always verify your engine’s exact specifications and existing part numbers before ordering to ensure proper fitment.
Compatibility
This piston ring set is commonly used for the following engine models and equipment applications:
- Engine Models: Isuzu 4HK1-TC, 4HK1-TCC, 6HK1-TC, 6HK1-TCC
- Excavator Models: Hitachi ZX200-3, ZX210-3, ZX240-3, ZX200-5G, ZX210-5G, ZX240-5G; Sumitomo SH200, SH210; Kobelco SK200, SK210 series
- Other Equipment: Isuzu NPR/NQR trucks, Isuzu industrial engines, and various construction machinery powered by 4HK1 or 6HK1 engines
Fitment is based on common usage patterns. We recommend cross-checking your engine serial number and existing piston ring dimensions for absolute compatibility.
Global Supply & Distribution
We offer worldwide shipping capabilities with extensive experience exporting to major industrial markets including North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands, France), Asia-Pacific (Japan, South Korea, Australia, Singapore), Middle East (UAE, Saudi Arabia, Qatar), Africa (South Africa, Nigeria), and South America (Brazil, Chile, Peru).
Fast delivery is available to major ports and industrial centers such as Shanghai, Rotterdam, Los Angeles, Dubai, and Singapore. We maintain reliable inventory levels and offer flexible shipping options including air freight, sea freight, and express courier services to meet urgent project deadlines. Our export documentation complies with international trade standards, ensuring smooth customs clearance worldwide.
Quality Assurance
All piston ring sets are manufactured under strict quality control systems adhering to ISO 9001:2015 standards. Each ring undergoes rigorous dimensional inspection, hardness testing, and surface finish verification before packaging. We ensure materials meet OEM specifications for thermal expansion, wear resistance, and fatigue strength.
We offer a 12-month warranty against manufacturing defects from the date of purchase. In the unlikely event of a defect, we provide prompt replacement or refund. Our testing procedures include compression ring gap measurement, oil ring tension testing, and visual inspection for surface imperfections to guarantee reliable performance in your engine rebuild.
FAQ
Q: How do I verify this piston ring set fits my Isuzu 4HK1 engine?
A: Check your engine’s serial number and the existing part number on your old piston ring set. The numbers 8-98023-526-0 and 8-98023-525-0 are standard for 4HK1 and 6HK1 engines. Measure your cylinder bore diameter to ensure it matches standard specifications. If your engine has been rebored, you may require oversize rings.
Q: Can I install these rings without removing the engine from the excavator?
A: While possible in some cases, we recommend removing the cylinder head and oil pan for proper access. For complete piston ring replacement, the piston assembly must be extracted from the engine block. This typically requires removing the excavator’s engine from the chassis. Always follow the manufacturer’s service manual for your specific excavator model.
Q: What is the recommended break-in procedure after installing new piston rings?
A: After installation, perform a gradual break-in period of 50-100 operating hours. Avoid sustained high RPM or heavy loads initially. Vary engine speed and load conditions to allow proper ring seating. Use high-quality diesel engine oil meeting API CJ-4 or CK-4 specifications. Monitor oil consumption closely during the first 100 hours and check for any abnormal smoke or performance issues.
