Step Tappet Repair Kit Cummins 3804700 | 3803497, 4077027, 3085343

Keep Your Engine Timing Precise with the Cummins 3804700 Step Tappet Repair Kit

The Cummins 3804700 Step Tappet Repair Kit is a comprehensive solution engineered to restore and maintain the Step Timing Control (STC) system in heavy-duty Cummins diesel engines. The step tappet is a critical component of the engine’s valvetrain and fuel injection timing system, transferring camshaft motion to ensure precise valve and injector operation. Over time, wear on the tappet components can lead to timing inaccuracies, reduced fuel efficiency, and potential engine damage. This repair kit provides all the essential components to rebuild the step tappet to factory-standard performance.

Key Features & Benefits

• Complete Repair Solution: Includes high-quality components such as the retaining ring, compression spring, injector springs, ball guide, and tappet socket for a thorough rebuild.
• Optimized Engine Performance: Restores precise Step Timing Control (STC) to ensure optimal fuel injection timing, combustion efficiency, and power output.
• Durable Construction: Manufactured from premium-grade materials designed to withstand the extreme pressures and temperatures of heavy-duty diesel operations.
• Cost-Effective Maintenance: Rebuilding the step tappet with this kit is a highly economical alternative to replacing the entire assembly, saving you time and money.

Engine Compatibility

This step tappet repair kit is compatible with a wide range of Cummins heavy-duty diesel engines, including:

• Cummins L10 & M11 (including Celect / Celect Plus)
• Cummins N14 & NT855 (including STC and mechanical applications)
• Cummins K19, K38, K50, KTA19, KTA38, KTA50
• Cummins QSK19 & QSK60

Kit Bill of Materials (BOM)

• 1 x Retaining Ring (3027988)
• 1 x Compression Spring (3027994)
• 1 x Plunger Spring (3054852)
• 1 x Ball Guide (3076033)
• 1 x Tappet Socket (3085345)
• 1 x STC Spring (3085343 / 4077027)