2803730 2706252 Water Pump for CAT 303.5C 303.5D 303C 304C 304D 305.5D 305C

This Water Pump is a coolant circulation pump compatible with CAT 303.5C, 303.5D, 303C, 304C, 304D, 305.5D, and 305C models and matches OEM Part# 280-3730 and 270-6252.

Product Overview

This Water Pump circulates coolant through the engine block and radiator to prevent overheating in compact CAT excavators. Designed as a direct replacement for the original pump, this water pump maintains proper engine operating temperature for models including the 303.5C and 305C. It is built to meet OEM specifications for reliable long-term performance.

Key Features & Performance

• Precision-cast impeller provides consistent coolant flow at all engine speeds
• Heavy-duty bearing assembly reduces shaft wobble and extends service life
• Includes a new gasket for a leak-free seal during installation
• Direct bolt-on design requires no modifications for installation
• Balanced rotating assembly minimizes vibration and noise

Fitment & Compatibility

• CAT 303.5C
• CAT 303.5D
• CAT 303C
• CAT 304C
• CAT 304D
• CAT 305.5D
• CAT 305C

Common Uses

• Replacing a leaking or noisy water pump on a compact CAT excavator
• Performing scheduled cooling system maintenance during engine overhaul
• Restoring coolant circulation after a thermostat or radiator replacement

Technical Specifications

• Part Number(s): 280-3730, 270-6252
• Material: Cast Iron Housing with Steel Impeller
• Mounting Type: Bolt-On
• Includes Gasket: Yes

Frequently Asked Questions

Q: Is this water pump a direct replacement for the original CAT part? A: Yes, this pump is designed to match the dimensions and flow rate of the OEM 280-3730 and 270-6252 units.

Q: Does this water pump come with the pulley? A: No, the pulley must be transferred from your old pump; this is the pump body only.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.