CAT 1R-1807 Oil Filter — spin-on OEM replacement for Cat engines, high-efficiency media

The CAT 1R-1807 is a genuine Caterpillar spin-on oil filter engineered to maintain oil cleanliness and protect engine components in heavy-duty Cat machinery.

Designed by Caterpillar for compatibility with Cat engines, the 1R-1807 oil filter delivers dependable particle removal and fluid containment in demanding work environments. This spin-on filter matches specific thread and size specifications used across many Cat applications and is cross-referenced to Fleetguard LF3973, offering a direct-fit replacement that preserves service intervals and filtration performance.

How does the CAT 1R-1807 protect an engine during heavy use?

The 1R-1807 captures contaminants and prevents abrasive particles from circulating in the oil, reducing wear on bearings and other precision surfaces. Its internal media and seal design help maintain oil pressure and integrity under load.

• Advanced efficiency media traps fine particles to reduce wear
• Spin-on design simplifies replacement during scheduled service
• Durable sealing and construction sustain pressure in high-demand conditions

What are the physical and installation specifications I need to know?

This filter has a 107.9 mm diameter and a 254.6 mm height, with a 1 1/8-16-2B thread size for direct fit on compatible housings. Those dimensions ensure correct fitment and proper gasket seating for an oil-tight connection.

• Height: 254.6 mm — fits designated Cat filter housings
• Diameter: 107.9 mm — consistent with OEM sizing
• Thread: 1 1/8-16-2B — standard spin-on mounting for Cat models

How does the 1R-1807 compare to cross-reference options like Fleetguard LF3973?

The 1R-1807 is the Caterpillar genuine part designed to meet Cat performance expectations; Fleetguard LF3973 is an acceptable cross-reference for some applications. Choosing the OEM Cat filter ensures exact specification matching and is recommended for preserving warranty and service predictability.

• Genuine Caterpillar part tailored to Cat engine design
• Cross-reference: Fleetguard LF3973 for compatible alternatives
• Using the OEM part helps maintain expected oil-change intervals

When should this filter be replaced and what service tips help ensure best results?

Replace the filter according to your engine’s service schedule or when oil analysis recommends earlier service. When installing, clean the mounting surface, lubricate the gasket lightly with clean oil, and torque to the vehicle or equipment manufacturer's recommendation.

• Follow your engine’s scheduled oil-change intervals for replacement
• Inspect and clean the filter mounting surface before installation
• Lubricate gasket and tighten to the correct specification to prevent leaks

Who is this for: The CAT 1R-1807 oil filter is intended for fleet managers, heavy-equipment operators, and service technicians who maintain Caterpillar engines and want an OEM filtration solution that fits directly, sustains service intervals, and protects engine components in commercial, construction, mining, or agricultural settings. If you need a reliable spin-on filter sized to Cat specifications with proven compatibility and cross-reference options, the 1R-1807 is built for that role.