7D8439 Shim for Caterpillar Equipment

7D8439 is a steel shim used in wheel and final drive assemblies of Caterpillar equipment. It is installed as required to provide the specified bearing preload during assembly or service of the applicable machine components.

This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts). The part is identified by SKU 7D8439 and is listed for use with Caterpillar engine and machine applications.

Fitment

The 7D8439 shim is listed for the following Caterpillar equipment models and engine-machine applications:

• Caterpillar 3176C
• Caterpillar 3196
• Caterpillar 3304
• Caterpillar 3306
• Caterpillar 3406
• Caterpillar 3406B
• Caterpillar 3406C
• Caterpillar C-12
• Caterpillar C-9
• Caterpillar C6.6

Application: wheel and final drive assemblies where a shim is required for bearing preload adjustment. Compatibility should be checked against the machine configuration and the service specification before installation.

Cross-reference numbers

• 7D8439
• 7D-8439

7D8439 and 7D-8439 are the two listed formats for identifying the same shim part number.

Specifications

The shim is a flat steel component with a specified thickness and outside diameter. Its purpose in the wheel or final drive assembly is to establish the required bearing preload when the assembly design and service procedure call for this part. The 5/8-inch fastener reference and the 0.178 mm thickness should be verified against the applicable repair documentation before fitting.