CAT Fuel Water Separator 175-2949 — OEM diesel filter, 185mm height, 1-14″ thread for reliable water and contaminant removal

CAT 175-2949 Advanced High Efficiency Fuel Water Separator is a genuine Caterpillar fuel filter designed to remove water and contaminants from diesel fuel for reliable engine protection.

The CAT 175-2949 is an OEM fuel/water separator engineered to meet Caterpillar specifications for fit and filtration performance. Built for vehicle-specific installations, this component balances compact dimensions with robust separation capability to protect fuel systems and injectors. If you want a direct-replacement, factory-quality fuel water separator, the 175-2949 provides the correct thread, height, and diameter to match original equipment.

What does the CAT 175-2949 remove from my fuel?

This separator targets free water and particulate contamination before fuel reaches critical engine components. It uses an internal media designed to coalesce and retain water droplets while capturing dirt and rust particles, reducing wear and injection issues.

• Removes free water and separates it from diesel fuel
• Captures particulate contaminants down to specified micron ratings
• Helps prolong injector and pump life by delivering cleaner fuel
• Genuine CAT media and seals optimized for original equipment

How will I know it fits my vehicle?

The 175-2949 is a vehicle-specific, direct-replacement cartridge made to match Caterpillar fuel systems. Key dimensions and thread size correspond to factory mounts so installation is straightforward when replacing the original separator.

• Thread size: 1 - 14 inch for correct mounting compatibility
• Height: 185 mm — matches OEM installation envelope
• Diameter: 93 mm — designed for factory filter housings
• Fit type: Vehicle Specific — verify parts manual or VIN before purchase

What are the physical specs and why do they matter?

Physical dimensions and thread form ensure a secure seal and proper flow characteristics inside the fuel system. Correct height and diameter maintain clearance and allow the internal media to perform as intended, while the specified thread angle prevents leaks and simplifies replacement.

• 185 mm height provides required media volume for separation
• 93 mm diameter ensures correct sealing surface and housing fit
• 1 - 14 inch thread guarantees proper engagement with filter head
• Factory tolerances maintain consistent pressure drop and flow

How do I install or replace the CAT 175-2949?

Replacement follows standard fuel filter service steps and should be performed with the engine off and pressure relieved. Use OEM-recommended procedures: drain any water first, remove the old separator, clean the mount, lubricate seals, and hand-tighten to specified torque to avoid leaks.

• Relieve system pressure and collect drained fuel appropriately
• Drain free water before removing the old separator for cleaner service
• Clean the mounting surface, lubricate gasket, and thread carefully
• Hand-tighten and check for leaks after priming the system

Who is this for? Technicians, fleet managers, and owners of Caterpillar-equipped vehicles seeking an authentic replacement part will benefit from the 175-2949. It’s intended for those who require factory-fit filtration performance to protect diesel injection systems and extend maintenance intervals. Always verify compatibility with your vehicle’s parts manual or VIN, and use genuine CAT components to preserve equipment reliability and resale value.