3406 Set:

---Valve guide oem:1737188

---Intake valve seat oem:4N5893

---Exhaust valve seat oem:1W5283

Engineered to meet the exacting standards of Caterpillar's 3406 engine platform, these OEM-specified valve seats (#4N5893 intake / #1W5283 exhaust) deliver uncompromising durability and sealing performance in the most demanding operating conditions. These critical components form the foundation for proper valve operation, ensuring optimal combustion efficiency throughout extended service intervals.

Material Innovation for Extreme Applications

The exhaust valve seat (1W5283) utilizes a proprietary high-nickel chromium alloy engineered to withstand continuous exposure to 850°C (1562°F) exhaust gases while resisting thermal fatigue and oxidation. The intake seat (4N5893) features a copper-impregnated iron matrix that combines excellent thermal conductivity with superior machinability, promoting both heat dissipation and precise surface finish.

Performance-Enhancing Features:

1. Extended Component Life - Advanced metallurgy reduces valve recession by up to 45% compared to conventional seats, particularly valuable in high-hour industrial applications where downtime is costly.

2. Optimized Heat Management - The exhaust seat's multi-layer alloy construction creates a thermal barrier that:

   • Reduces heat transfer to cylinder heads

   • Minimizes thermal distortion

   • Maintains critical sealing surfaces under extreme temperatures

3. Precision Machined Surfaces - CNC-finished to 0.5-0.8μm Ra surface roughness ensures:

   • Perfect 360° valve contact

   • Consistent compression retention

   • Reduced blow-by across all operating conditions

Technical Specifications:

• Exhaust Seat Material: Ni-Cr-Mo-Ti alloy matrix

• Intake Seat Material: Cu-Fe composite with beryllium enhancement

• Hardness: 48-52 HRC (exhaust), 38-42 HRC (intake)

• Temperature Range: -40°C to 900°C (exhaust)

• Concentricity: 99.6% minimum

Ideal for Severe-Service Applications:

• Over-the-road trucking (long-haul applications)

• Marine and offshore power systems

• Mining and quarry equipment

• Industrial power generation

• Heavy construction machinery

Documented Field Performance:
Operators consistently report:
• 30-35% longer valve service life
• 4-6% improved fuel efficiency through better sealing
• Reduced cylinder head temperatures in turbocharged applications
• Lower maintenance costs through extended overhaul intervals

These Caterpillar 3406 valve seats represent the ideal fusion of materials science and precision engineering. Available in standard configurations with options for oversized repairs or performance enhancements, they deliver OEM-quality performance with the durability demanded by today's severe-service applications. The exhaust seat's advanced thermal properties make it particularly effective in aftercooled and turbocharged configurations where exhaust gas temperatures routinely challenge conventional materials.

With over 30 years of expertise in automotive parts export, we specialize in manufacturing high-precision, high-performance components for global markets. Our products meet stringent quality standards and are trusted by clients worldwide.

• Equipped with advanced testing machinery for material analysis and heat treatment verification.
• Dedicated engineering and QC teams ensure every product meets your exact specifications and performance requirements.

• Custom solutions available based on your samples or technical drawings.
• Trial orders (small quantities accepted) to facilitate smooth collaboration and build long-term partnerships.