Seal 4L9021 for Caterpillar Equipment

4L9021 is a lip-type seal used in Caterpillar industrial engines, marine products and engine-generator sets. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The seal is identified by SKU 4L9021 and is intended for applications where the specified shaft and housing dimensions correspond to the dimensions listed below. The available application data is grouped by equipment type to distinguish the engine, marine and generator-set fitments.

Fitment

Industrial engines

• Caterpillar 3208
• Caterpillar 3304
• Caterpillar 3304B
• Caterpillar 3306
• Caterpillar 3306B
• Caterpillar D330C
• Caterpillar D333C
• Caterpillar D343
• Caterpillar D353C
• Caterpillar D353D
• Caterpillar D353E

Marine products

• Caterpillar 3208
• Caterpillar 3304
• Caterpillar 3306
• Caterpillar D330A
• Caterpillar D330C
• Caterpillar D333A
• Caterpillar D333C
• Caterpillar D336
• Caterpillar D343
• Caterpillar D353C
• Caterpillar D353D
• Caterpillar D353E

Engine-generator sets

• Caterpillar 3304
• Caterpillar 3304B
• Caterpillar SR4

The model designations above represent the listed Caterpillar equipment applications for part number 4L9021. The same seal number is specified for several equipment categories, including industrial engines, marine products and engine-generator sets.

Cross-reference numbers

• 4L9021
• 4L-9021

4L9021 and 4L-9021 are the same seal identification written with different number formatting. Use the complete equipment application and dimensional data when matching the part.

Specifications

The stated outside diameter, shaft diameter and seal width are the dimensional parameters supplied for this part. The material designation is NBR, and the seal construction is specified as lip type. The listed weight and package dimensions are 0.1 lb, 8.89 cm in length, 15.24 cm in width and 1.27 cm in depth.