6V8399 O-Ring for Caterpillar Equipment

The 6V8399 O-ring is a standard rubber sealing component for Caterpillar equipment, including Caterpillar asphalt pavers and backhoe loaders. It can be used as an axial or radial seal in compatible assemblies to help limit fluid leakage and the entry of contaminants. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The seal is made from nitrile rubber (NBR) with a specified hardness of 90 Shore A. The supplied product identification includes the Caterpillar reference format 6V-8399 and the compact format 6V8399.

Fitment

• Equipment brand: Caterpillar
• Equipment type: asphalt paver
• Equipment type: backhoe loader
• Caterpillar 10 FT
• Caterpillar 10-20B
• Caterpillar 10-20WB
• Caterpillar 8 FT
• Caterpillar 416C
• Caterpillar 416D
• Caterpillar 420D
• Caterpillar 420E
• Caterpillar 426C
• Caterpillar 430D

Fitment should be checked against the equipment model, serial number, and the dimensions of the installed seal position before installation. The listed models include both machine series identified by numerical designations and asphalt paver configurations identified as 8 FT, 10 FT, 10-20B, and 10-20WB.

Cross-reference numbers

Specifications

The dimensional data for this O-ring includes the inner diameter, outside diameter, and cross-section diameter listed above. These values identify the sealing size, while the SAE AS568 dash designation provides an additional size reference for component matching. The NBR material specification and 90 Shore A hardness describe the seal compound and hardness stated for the part.