2502940 Retainer-Pin Fits Caterpillar Models

One New Aftermarket Replacement Piston Pin Retainer for Caterpillar (Cat) C15, C16, C18 and 3406E Engines

This aftermarket piston pin retainer (retaining ring) secures the piston pin within the piston assembly in Caterpillar heavy-duty diesel engines. The internal retaining ring seats in the piston pin bore to prevent lateral movement of the pin during engine operation. It is a critical engine rebuild component used in Cat C15, C16, C18, and 3406E engine families, which power a broad range of Caterpillar construction equipment, trucks, and industrial machines.

Specifications

• Type: Internal Retaining Ring (Piston Pin Retainer)
• Free O.D.: 2.535 in (64.38 mm)
• Thickness: 0.078 in (1.98 mm)

Compatible Engines

Caterpillar: 3406E, C15, C15 ACERT, C16, C18

Compatible Models (partial list - equipment powered by above engines)

Caterpillar Excavators: 323D L, 323D2 L, 330D L, 336D L, 365C, 365C L, 365C L MH, 374D L, 374F L, 385C, 385C FS, 385C L, 385C L MH, 390D, 390D L, 390F L

Caterpillar Motor Graders: 24M

Caterpillar Wheel Tractors/Scrapers: 621B, 621G, 623G, 627F, 627G, 631D, 631E, 631G, 637D

Caterpillar Off-Highway Trucks: 735, 740, 825C, 825H, 826C, 826H

Caterpillar Pipelayers: 583T, 587T

Replaces Part Number(s):

2502940, 250-2940

Aftermarket Interchange Numbers

PAI 311009; Interstate-McBee M-2502940; 5000-231; N5000-231

New aftermarket replacement part - not remanufactured, not used.