8M8281 Silicone O-Ring — SKU 8M8281

The 8M8281 silicone O-ring is a sealing component for Caterpillar equipment, including articulated dump trucks and engine-machine applications. It is used in fixed installations and in certain applications involving moving parts. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The seal is made from silicone rubber identified as VMQ and has a nominal hardness of 70 Shore A. The supplied part corresponds to Caterpillar part number 8M-8281 and SAE AS568 dash size -202. The dimensional data and application information below are provided for identification and equipment matching.

Fitment

The O-ring is listed for the following Caterpillar equipment types and models:

• Caterpillar articulated dump trucks
• Caterpillar engine-machine applications
• Caterpillar D250E
• Caterpillar D250E II
• Caterpillar D300E
• Caterpillar D300E II
• Caterpillar D350E
• Caterpillar D400E
• Caterpillar 3304 engine
• Caterpillar 3306 engine
• Caterpillar 3406 engine
• Caterpillar 3406B engine

Use of the seal depends on the configuration and service application of the machine or engine. Confirm the required seal dimensions and part-number designation against the equipment parts information before installation.

Cross-reference numbers

• Caterpillar: 8M-8281
• SAE AS568 designation: -202

The product SKU is written as 8M8281, while the Caterpillar part-number format is written as 8M-8281. These designations refer to the same O-ring identification shown in the supplied product data.

Specifications

The part is supplied as a silicone O-ring. The product data does not specify an installation kit, additional seals, fasteners, lubricant, or other included components; therefore, no additional items are listed as included.