Backup Ring 1682271 for Caterpillar Equipment

The 1682271 backup ring is a transmission seal ring used in sealing assemblies on Caterpillar backhoe loaders. It is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The ring is installed together with a compatible seal in applications where the sealing assembly is exposed to increased hydraulic or transmission pressure. Its function is to support the seal and limit extrusion through the clearance between mating components. The supplied product data identifies the part as a backup ring with a urethane rubber construction.

Fitment

The part is listed for Caterpillar backhoe loader equipment in the following models:

• Caterpillar 416C
• Caterpillar 416D
• Caterpillar 420D
• Caterpillar 424D
• Caterpillar 426C
• Caterpillar 428C
• Caterpillar 428D
• Caterpillar 430D
• Caterpillar 432D
• Caterpillar 436C
• Caterpillar 438C
• Caterpillar 438D
• Caterpillar 442D
• Caterpillar 446B
• Caterpillar 446D

Fitment should be checked against the machine model and the number marked on the removed component before installation. The model information supplied for this part identifies the equipment type as backhoe loader and does not specify a separate position or individual transmission assembly.

Cross-reference numbers

Numbers 1682271 and 168-2271 refer to the same listed backup ring. The number 168-2271 is the equipment manufacturer reference shown in the supplied application data.

Specifications

The cross-section width, inner diameter, and cross-section height are the dimensional values provided for the ring. Length, width, depth, and weight are listed separately in the product data as overall product dimensions and weight. No additional seals, retaining elements, or installation tools are specified as included with the part.