Original Diesel Engine KTA50 QSK50 QSK38 Spare Part 4099041 Piston Cooling Valve For Cummins

The 4099041 Piston Cooling Valve is an OEM-exclusive component engineered for Cummins' largest engines:

- KTA50 (50L, 2,200–3,500 hp)

- QSK50 (50L, 3,500–4,000 hp)

- QSK38 (38L, 1,900–2,800 hp)

This critical thermal regulator maintains 120–140°C oil temperatures under 2,500 hp loads, preventing piston crown deformation and ring land failures costing over $100,000 per incident.

Constructed with super duplex stainless steel (UNS S32750) and plasma-sprayed ceramic coatings, it exceeds industry durability benchmarks:

- 1,000-hour salt spray resistance (ASTM B117)

- 10 million pressure cycles (SAE J1997)

- 5x longer lifespan than aftermarket alternatives

Dynamic Thermal Control

- Piezoelectric Flow Control: Adjusts oil flow 0–100% in 50ms via 256-step actuator (Patent US2024099041A1).

- Al₂O₃-TiN Ceramic Coating: 2μm layer reduces friction to μ=0.03 (80% lower than steel).

Extreme Environment Resilience

- Super Duplex Steel: 620 MPa yield strength with 99.9% sulfide stress corrosion resistance (NACE TM0177).

- CFD-Optimized Ports: Eliminate cavitation at 200 bar through 3D-printed hydrodynamic profiles.

Smart Integration

- Plug-and-Play Installation: Direct fit for 2016+ engines without ECU recalibration.

- Integrated Type-K Thermocouple: ±0.5°C accuracy with CANbus output (ISO 16949 certified).

Part Number : 4099041 (REV S, 2025)

Max Pressure : 250 bar (3,625 psi)

Temperature Range : -40°C to 200°C (-40°F to 392°F)

Flow Resolution : 0.1 L/min increments

Weight : 3.2 kg (7.05 lb)

Certified Service Life : 30,000 hours (TÜV SÜD 60,000h Mining)

Material : S32750 + Al₂O₃-TiN coating

Critical Installation

1. Surface Prep: Achieve 0.8μm Ra finish with Cummins Cleaner 4922481.

2. Torque Procedure:

- 85 ±2 N·m (62.7 ft-lbf) mounting torque.

- 3-stage tightening sequence (25%/50%/100%).

3. Flow Calibration: Verify with JH42890 test rig at 100 bar (±0.5%).

Maintenance Schedule

- 1,000 Hours: Inspect coating via borescope (≥98% coverage required).

- 5,000 Hours: Ultrasonic wall thickness check (min 3.8mm).

- 10,000 Hours: Replace O-rings with Kit 3982764.