9X4276 Oil Pressure Switch for Caterpillar 3412 3406 3126 3116 3114 3408B 3512B

Product Overview

This oil pressure switch monitors engine oil pressure and activates a warning light or gauge when pressure drops below safe levels. Designed for heavy-duty Caterpillar diesel engines, this 9X4276 switch ensures accurate pressure readings to protect against costly engine damage. The switch is essential for maintaining proper lubrication and preventing engine failure in construction, marine, and industrial equipment.

Key Features & Performance

• Direct OEM replacement – matches Caterpillar part number 9X4276
• NPT threaded fitting for secure installation
• Normally closed or normally open circuit options (verify per application)
• Rugged construction withstands high vibration and temperature extremes
• Pre-calibrated pressure threshold for consistent activation
• Durable brass or steel housing resists corrosion

Fitment & Compatibility

• Caterpillar 3114 engine
• Caterpillar 3116 engine
• Caterpillar 3126 engine
• Caterpillar 3406 engine
• Caterpillar 3408B engine
• Caterpillar 3412 engine
• Caterpillar 3512B engine

Common Uses

• Monitoring oil pressure in heavy-duty diesel generators
• Replacing failed switches on construction equipment like excavators and loaders
• Marine propulsion engines requiring reliable pressure alerts
• Industrial pumps and compressors with Caterpillar power units

Technical Specifications

• Part Number(s): 9X4276

Frequently Asked Questions

Q: How does this oil pressure switch work? A: The switch opens or closes an electrical circuit when engine oil pressure falls below its preset threshold, triggering a warning light or alarm.

Q: Is this switch compatible with my Caterpillar 3406B engine? A: Yes, the 9X4276 switch fits the 3406, 3406B, and 3408B models listed, but always verify thread type and electrical configuration before installation.

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