Basic Info.
| Part no. | 7N8574/6N8101 | Material | steel |
| Type | Cylinder Head Assembly | Part Type | Engine Parts |
| Compatibility | Caterpillar 3304PC | Transport Package | Wooden box |
| Trademark | DIRON | Origin | Luoyang City |
| HS Code | 84099991 | Production Capacity | 5000PCS/Year |
Product Details
Item Model： 7N8574/6N8101
Date First Listed：2025/06/24
Manufacturer：Diron Parts
Product Description
Part Number: 7N8574
Part Type：Cylinder Head Complete
Description: Replacement Part Cylinder Head Assembly 7N8574/6N8101 for Caterpillar 3304PC
Product Introduction: Cylinder Head Assemblies 7N8574 and 6N8101 for Caterpillar 3304 Precombustion Chamber (PC) Diesel Engine
Overview
The Cylinder Head Assemblies 7N8574 and 6N8101 are precision-engineered components designed for the Caterpillar 3304 Precombustion Chamber (PC) diesel engine, critical for sealing the combustion chamber, housing the valves, and facilitating efficient airflow and fuel combustion. These parts are essential for maintaining engine performance and reliability in heavy-duty applications, such as wheel loaders, excavators, and track-type tractors. Available as new aftermarket, remanufactured, or genuine OEM parts, they provide robust solutions for engine maintenance.
Key Features
Material: Constructed from high-grade cast iron, designed to withstand high temperatures, pressures, and mechanical stresses in the 3304 PC engine. Features precision-machined surfaces for optimal sealing, heat dissipation, and durability.
Design: Engineered to OEM specifications for precise fitment and performance in 3304 PC engines. Includes valve seats, guides, and ports optimized for efficient combustion and exhaust flow in precombustion chamber systems. Available as bare heads (with valve guides and seats) or loaded assemblies with pre-installed valves, springs, premium valve stem seals, retainers, and injector cups. Incorporates advanced cooling passages to manage engine temperature effectively.
Compatibility: Compatible with Caterpillar 3304 Precombustion Chamber (PC) diesel engines, used in:
Wheel Loaders: 930, 950, 966C.
Track-Type Tractors: D4D, D4E, D5, D6C, D6D, 941, 951B, 955L.
Excavators: 225.
Pipelayers: 561C, 571G, 572G.
Other Applications: Generator sets (SR4, 3304), wheel tractor-scrapers (627, 637), and compactors (815, 816).
Engines: 3304, 3304B (inline 4-cylinder, 7.0L, 2-valve per cylinder configuration, precombustion chamber), with specific serial numbers (e.g., 2B, 5B, 7Z, 10Z, 12Z). Exact compatibility must be verified using the engine’s serial number via CAT SIS, as per Caterpillar’s policy.
Cross-References:
7N8574: 7N-8574, CA7N8574, 6N8101, 2P6274, 6N8875, 8N1188, 20R8344, 360422 (PAI reference).
6N8101: 6N-8101, CA6N8101, 7N8574, 2P6274, 6N8875, 8N1188, 20R8344, 360422.
Both part numbers are interchangeable for 3304 PC engines and are often listed as equivalent or superseded numbers, with 8N1188 being a common cross-reference. They are distinct from 1N4304 (3304DI, from the prior query) and 8N1187/6N8120 (3306).
Dimensions: Specific dimensions are not publicly detailed, but approximate measurements for 3304 heads are 914.4 mm (length), 304.8 mm (width), and 139.7 mm (height), based on supplier data for similar heads (e.g., 1N4304). Typical bare cylinder heads weigh approximately 150-180 lbs (68-82 kg), with loaded assemblies heavier (e.g., 151 lbs/68.5 kg for 7N8574, per PAI data) due to pre-installed components.
