4I3627 Backup Ring for Caterpillar Equipment

The 4I3627 backup ring is a transmission seal ring used in Caterpillar equipment, including specified Caterpillar engines, machines, and excavators. This is a new aftermarket part manufactured by CTP (Costex Tractor Parts).

The available fitment data identifies the part for Caterpillar equipment with 3066, 3116, 3126, 3126B, C6, C6.4, and C7 engines, as well as Caterpillar 320B excavator series machines. The part number must be checked against the equipment parts documentation and the configuration of the machine before installation.

Fitment

• Caterpillar engine-machine applications
• Caterpillar excavator applications
• Caterpillar 3066
• Caterpillar 3116
• Caterpillar 3126
• Caterpillar 3126B
• Caterpillar C6
• Caterpillar C6.4
• Caterpillar C7
• Caterpillar 320B
• Caterpillar 320B L
• Caterpillar 320B LL

The listed model designations include both engine models and machine series. The 320B, 320B L, and 320B LL designations are retained separately because the available application data lists them as distinct Caterpillar models. Fitment is limited to the applications for which the 4I3627 number is specified.

Cross-reference numbers

4I3627 is the Caterpillar part code associated with this backup ring and is also the SKU for this CTP replacement part. No additional supplier reference numbers are provided in the available product data.

Specifications

The supplied dimensional data is listed as length, width, and depth. The available description does not specify the material, thread, sealing compound, installation position, or whether additional seals or mounting components are included.