Seal Ring 9D7972 for Caterpillar Transmission

9D7972 is a transmission seal ring used in rotary coupling and torque converter applications on Caterpillar equipment. The ring is installed between stationary and rotating transmission components to support oil transfer while limiting fluid leakage.

This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified by SKU 9D7972 and by the hyphenated part-number format 9D-7972. It belongs to the transmission seal ring category and is intended for service and replacement applications where the specified 9D7972 seal ring is required.

Fitment

The 9D7972 seal ring is listed for the following Caterpillar motor grader models and series:

• AUTOGRADER
• 120G
• 120H
• 120H ES
• 120H NA
• 120K
• 120K 2
• 12H
• 135H
• 135H NA
• 140H
• 160H NA
• 163H NA

Fitment should be confirmed against the machine model, transmission configuration, and the part number installed during service, as equipment series can use different transmission components.

Cross-reference numbers

9D7972 and 9D-7972 identify the same seal ring designation, with the difference being the presentation of the part number with or without a hyphen.

Specifications

The seal ring forms part of the transmission sealing arrangement at a rotary interface. In operation, oil is conveyed from a stationary component toward a rotating component through the related transmission or torque converter assembly. The ring’s curved outside-diameter profile and 121 mm inner diameter are the listed identification characteristics for this part.

Before installation, compare the removed seal ring with the replacement for part-number designation, inner diameter, cross-section profile, and material. The listed dimensions of 15.24 cm, 20.32 cm, and 2.54 cm are provided as product specification data and should not be treated as the seal ring’s inner diameter or cross-section measurements.