3B8453 O-Ring for Caterpillar Equipment

The 3B8453 is a standard O-ring seal for Caterpillar engines and machines. It is used on Caterpillar 3408, 3408C, 3408E, 3412, 3412D, 3412E, 3508, 3508B, 3512 and 3512B engine models. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The seal is made for installation in compatible Caterpillar equipment where an O-ring with the specified AS568 dash size, dimensions and material characteristics is required. The component is supplied as an individual black nitrile rubber sealing ring without a coating.

Fitment

• Caterpillar 3408 engine
• Caterpillar 3408C engine
• Caterpillar 3408E engine
• Caterpillar 3412 engine
• Caterpillar 3412D engine
• Caterpillar 3412E engine
• Caterpillar 3508 engine
• Caterpillar 3508B engine
• Caterpillar 3512 engine
• Caterpillar 3512B engine

Equipment type listed for this part: Caterpillar engine and machine applications. The model information identifies the engine series and variants for which the 3B8453 O-ring is specified. Actual installation position depends on the assembly and service application within the machine or engine.

Cross-reference numbers

The numbers 3B8453 and 3B-8453 identify the same O-ring reference in different number formats. The SAE AS568 dash size is listed separately as -314 and should be checked together with the measured dimensions when confirming part compatibility.

Specifications

The principal dimensional values for identification are the 0.73-inch inner diameter, 1.145-inch outside diameter and 0.21-inch cross-section diameter. The NBR material is specified with a hardness of 75 Shore A, while the ring colour is black and the surface has no coating.