Fuel Water Separator 326-1644 for Caterpillar Excavators

Description

This 326-1644 fuel water separator is an advanced-efficiency spin-on filter engineered as a direct replacement for the Caterpillar 326-1644, widely used across CAT’s mid-size excavator lineup. It’s designed to eliminate free water and the majority of emulsified water from diesel fuel, along with fine contaminants, protecting fuel injectors and extending the service life of the secondary fuel filter.

Product Overview

The 326-1644 fuel water separator uses filter media engineered to remove nearly all free water and roughly 90% of emulsified water from diesel fuel, along with small particulate contamination. As explained in this overview of how fuel water separators work, water in diesel fuel can cause corrosion, microbial growth, and injector damage if it isn’t removed before reaching the engine. Construction features designed to improve durability include a nylon center tube to prevent metal contamination and molded end caps to prevent leaks. Each unit is manufactured with a standard 1-14 UN spin-on thread and dimensionally verified against OEM measurements before shipment.

Fits the Following Caterpillar Excavator Models

This filter is also cross-referenced under the Caterpillar 1R-0770 part number, which uses the same specifications. Always confirm your machine’s serial number range against the OEM cross-reference before ordering, as fuel system filtration specifications can vary across production years within the same model.

OEM Cross-Reference Numbers

Key Features

• Advanced-efficiency water separation, removing nearly all free water and roughly 90% of emulsified water from diesel fuel
• Standard 1-14 UN spin-on thread for straightforward installation
• Nylon center tube to help prevent metal contamination
• Molded end caps designed to prevent leaks
• Dimensionally verified against OEM specifications, not just cross-reference number matching
• Consistent batch quality control, with raw material and pre-shipment testing on every production run

Specifications (Publicly Referenced Dimensions)

Dimensions below are compiled from publicly available cross-reference filter databases and are provided as a reference guide. Note that public sources showed some variation in reported height (180.7mm to 194mm) for this part number — please verify against your machine’s actual filter housing or OEM documentation before bulk ordering.

Why Source This Fuel Water Separator from IXIN Filter

We manufacture this 326-1644 fuel water separator in our own production facility, with quality control checkpoints from raw material inspection through final pre-shipment testing. If you’re sourcing for a distribution business or fleet, we can provide:

• Sample units for independent testing before a bulk order
• Documentation on OEM cross-reference verification
• Flexible MOQ and private-label packaging options
• Consistent batch-to-batch quality for repeat orders

Frequently Asked Questions

Is the 326-1644 the same part as the 1R-0770? Yes. The 326-1644 is cross-referenced to the Caterpillar 1R-0770 part number, which shares the same specifications and fitment.

How much water does this filter remove from diesel fuel? It’s designed to remove nearly all free water and approximately 90% of emulsified water, along with fine particulate contamination, before fuel reaches the injection system.

Will this fit all the excavator models listed? It fits the CAT excavator models listed above, but fuel system configurations can vary by production year and serial number range. We recommend confirming your machine’s specific configuration before ordering, especially for bulk purchases.

Do you offer samples before a bulk order? Yes. We recommend requesting a sample for independent testing before committing to a bulk order, especially for first-time buyers.

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Ready to order or request a sample? Contact IXIN Filter for pricing, MOQ, and lead time on the 326-1644 fuel water separator.