# Hydraulic Filter Cross

> A cited reference for hydraulic and lube-oil filter elements (pressure, return and suction line) by maker part number and model code, with brand cross-references: what a part is and what crosses to it. 4,066 part pages. Every fact links to the manufacturer document it came from, and every cross-reference carries an evidence label (see Data notes).

How to use this site as a source: quote the part number and manufacturer, and cite the part page URL. The page's Sources section names the exact catalogue page or manufacturer page behind each claim. Nothing is sold here. Where a part page shows a seller's price and availability, it is what that seller's page showed on the date given (offers in the part's index.json); the other seller buttons are outbound searches.

Machine-readable: every part page exists as JSON at the same URL plus `index.json` (for example https://www.hydraulicfiltercross.com/parts/hydac/0030-d-005-bh4hc/index.json). Sitemaps: https://www.hydraulicfiltercross.com/sitemap.xml. Full page index: https://www.hydraulicfiltercross.com/llms-full.txt.

## Key pages

- [How this site is built](https://www.hydraulicfiltercross.com/methodology/): sources, evidence labels, audits, what is deliberately missing
- [Brands](https://www.hydraulicfiltercross.com/brands/) and [Categories](https://www.hydraulicfiltercross.com/categories/)

## Categories

- [Replacement filter element](https://www.hydraulicfiltercross.com/categories/hydraulic-filter-elements-replacement-filter-element/): 1,031 parts
- [Pressure line filter element](https://www.hydraulicfiltercross.com/categories/hydraulic-filter-elements-pressure-line-filter-element/): 835 parts
- [Return line filter element](https://www.hydraulicfiltercross.com/categories/hydraulic-filter-elements-return-line-filter-element/): 674 parts
- [Spin-on hydraulic filter](https://www.hydraulicfiltercross.com/categories/hydraulic-filter-elements-spin-on-hydraulic-filter/): 42 parts
- [Suction filter element](https://www.hydraulicfiltercross.com/categories/hydraulic-filter-elements-suction-filter-element/): 17 parts

## Brands

- [HYDAC](https://www.hydraulicfiltercross.com/brands/hydac/): 3,269 parts
- [Main Filter](https://www.hydraulicfiltercross.com/brands/main-filter/): 793 parts

## Data notes

- Specifications are shown as the manufacturer prints them; a value printed without a unit is shown without one.
- Cross-references carry their evidence label: 4,493 Single source (one publisher's statement, not corroborated).
- No product images are shown.
- Data updated 2026-09-28. Contact: see the methodology page.