Product Overview

The CAT Pump Filler Cap (5CP21) is a genuine OEM replacement component designed for a wide range of CAT pump models, including 3CP, 4HP, 5CP, 5DX, 6DX, and 66DX series. This durable oil filler cap seals the crankcase oil reservoir, helping to maintain internal pressure, prevent contamination, and ensure smooth pump operation.

Essential for routine servicing or repairs, the cap is built from high-quality materials to withstand demanding high-pressure cleaning environments.

Key Features

✅ OEM CAT Pump Replacement Part – Genuine fit and long-lasting performance
✅ Compatible with Multiple Models – 3CP, 4HP, 5CP, 5DX, 6DX, 66DX
✅ Prevents Oil Leakage and Contamination – Protects internal pump components
✅ Durable Construction – Engineered for industrial and commercial use
✅ Simple Installation – Quick and easy to replace without special tools

Why Choose This Product?

This CAT 1346798 filler cap is a critical maintenance part that ensures your pump operates reliably under pressure. Whether you're maintaining a single unit or managing a fleet, using genuine CAT spares like this filler cap keeps your pressure washing system running at peak performance.

Perfect for workshop servicing, agriculture, industrial cleaning, and vehicle wash systems.