Baldwin - Coolant Bases

Coolant filter bases are used to add a spin-on filter to a cooling system not outfitted with a filter.

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    Coolant filter bases are used to add a spin-on filter to a cooling system not outfitted with a filter. The objective of diesel engine coolant filters, also known as water filters, is to remove contaminants from the engine cooling system and add chemicals to the coolant itself to replenish important protectants that may be lost over time. Coolant filters can be of cartridge or spin-on design; however, spin-on designs are most common on today's diesel engine cooling systems.

Performance Characteristics




Engine Oil Filter Housing Mount


2.53125 inch
64.3 mm


3 3/32 to 8 3/16 inch
78.6 to 208 mm


0.73 to 0.79 kg
1.6 to 1.75 lb

Inlet Port Size

3/8-18 NPT

Outlet Port Size

3/8-18 NPT

Outside Diameter

4.6875 inch
119.1 mm

FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE. This document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors provide product or system options for further investigation by users having technical expertise. The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components and assuring that all performance, endurance, maintenance, safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry standards, and follow the information concerning the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized distributors. To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and sufficient for all applications and reasonably foreseeable uses of the components or systems. Click here to view all product safety information.

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