2443838 Back-up Ring for Caterpillar Equipment

The 2443838 back-up ring is a sealing-system component used with Caterpillar equipment. It is installed with a seal to help prevent seal extrusion when pressure increases in the application.

This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts). The part belongs to the O-Ring Seals category and is identified by the Caterpillar reference number 244-3838.

Fitment

The back-up ring is listed for the following Caterpillar backhoe loader equipment and models:

• Caterpillar backhoe loaders
• Caterpillar 420D
• Caterpillar 420E
• Caterpillar 430D
• Caterpillar 430E

Fitment should be verified against the equipment model, serial number and the dimensions of the removed sealing component before installation.

Cross-reference numbers

The numbers 2443838 and 244-3838 identify the same back-up ring reference used for this component. The part number may be shown with or without the hyphen in equipment parts catalogs and ordering systems.

Specifications

The ring is designed to work as part of a complete sealing arrangement. Its stated function is to support the seal during pressure changes and protect the sealing system from extrusion. The dimensions listed above are the supplied specifications for the 2443838 part number.

Before replacing the component, compare the part number and measured dimensions with the existing back-up ring. The correct installation position depends on the design of the seal groove and the equipment assembly in which the ring is used.