8A5878 Bearing Cone fit Caterpillar

8A5878 is a bearing cone for Caterpillar equipment. It is used on Caterpillar 320C and 320D FM excavators, as well as Caterpillar 543, HF181, HF201, HF202, HF221, and HF222 forest machines. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified by the number 8A5878 and the hyphenated number 8A-5878. The application data associates this bearing cone with the listed Caterpillar excavator and forest machine models. The component is supplied as a bearing cone; the matching cup is identified separately by part number 4B8394.

Fitment

• Equipment brand: Caterpillar
• Equipment type: Excavators
• Excavator model: 320C
• Excavator model: 320D FM
• Equipment type: Forest machines
• Forest machine model: 543
• Forest machine model: HF181
• Forest machine model: HF201
• Forest machine model: HF202
• Forest machine model: HF221
• Forest machine model: HF222

The fitment list applies to the Caterpillar equipment models specified above. Model designation and machine type should be checked against the equipment identification and the part number before installation, particularly where the same machine series is available in more than one configuration.

Cross-reference numbers

• 8A5878
• 8A-5878

8A5878 and 8A-5878 are two number formats shown for the same bearing cone. The supplied application data does not identify additional manufacturer or supplier numbers for this bearing cone. Part number 4B8394 is listed as the corresponding cup and is not presented as the number of the cone itself.

Specifications

The dimensions provided for this part are an inner diameter of 3.750 inches and a width of 1.625 inches. The listed cup number, 4B8394, identifies the associated cup component; the product SKU remains 8A5878.