CAT 4W-6017 Fuel Injector – Heavy-Duty Durability with Enhanced Contamination Resistance for 3406E and Early C15 Common-Rail Systems
1. Product:4W-6017
2. Compatible Equipment: Diesel Fuel Injection Systems
3. Manufacturer: Aftermarket OEM Replacement
4. Condition: Brand New, Fully Tested
5. Origin: ABOSEDE Diesel
6. Shipping period: 3-5 business days
7. Payment terms: T/T, Western Union, PayPal
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Product Introduction
In an ideal world, fuel delivered to the injector would meet ISO 18/16/13 cleanliness standards-free of water, particulate matter, and microbial contamination. In the real world, fuel quality varies significantly across regions and applications, from mining operations with dusty refuelling practices to marine environments where water ingress is common. The CAT 4W-6017 is engineered to withstand the harshest fuel conditions with a hardened needle guide and an abrasion-resistant control piston that resist the erosive effects of particulate contamination. The result is an injector that maintains its flow accuracy and leak-off rate for a longer period, even when operating with fuel that falls short of ideal cleanliness standards.
Needle Guide Hardening – The First Line of Defence
The 4W-6017's needle guide is manufactured from a nitride-hardened steel with a case depth of 0.020 mm and a surface hardness of 1,200 HV. This hardening process creates a wear-resistant layer that protects the guide surface from the abrasive particles that cause the needle to lose its concentric alignment. A misaligned needle increases the leak-off rate and alters the spray pattern, leading to poor combustion. The 4W-6017's hardened guide maintains its clearance within 0.001 mm of its initial value after 4,000 hours of operation with moderately contaminated fuel, compared to a 0.004 mm increase for unhardened guides.
Abrasion-Resistant Piston – Protecting the Hydraulic Interface
The control piston of the 4W-6017 is coated with a tungsten-carbide layer applied via a high-velocity oxygen fuel (HVOF) thermal spray process. This coating achieves a hardness of 1,100 HV and a surface roughness of Ra ≤ 0.08 µm, providing exceptional resistance to the scoring that occurs when abrasive particles become trapped between the piston and the bore. The result is a stable leak-off rate that does not increase prematurely, even when operating with fuel that contains fine particulate matter.