Caterpillar 9U1738 Friction Disc For Heavy Equipment Clutch And Transmission

Caterpillar 9U1738 Friction Disc is a direct-replacement friction plate for CAT heavy‑equipment clutch and transmission assemblies. The cataloged OEM part number is 9U1738, and many aftermarket listings identify 2200190 as a direct-fit cross-reference for this disc, enabling seamless replacement in the same clutch-pack design without field adaptations. The disc is used inside CAT transmission and multi‑disc clutch packs to transfer torque as hydraulic pressure engages and disengages the pack, providing predictable engagement during gear shifts in equipment built around Caterpillar gear trains. Verified listings show 9U1738 as a Caterpillar friction disc and note 2200190 as fitting Caterpillar equipment that uses the 9U1738 component, including references to Caterpillar 990-series machines. As a standalone friction disc, it is designed to be installed in compatible CAT units during routine clutch service to restore clutch-pack integrity and performance. This part is intended for replacement of worn discs in compatible Caterpillar machines and does not require modifications to the surrounding transmission components when used with the proper service procedures.