2S9911 V-Belt Single Fits Caterpillar Models

One New Aftermarket Replacement Cogged V-Belt (BX78) for Caterpillar (Cat) Equipment

This single cogged V-belt is an aftermarket replacement for Caterpillar OEM part number 2S9911. A BX78 section cogged belt, it delivers reliable power transmission in Caterpillar construction and industrial equipment drive systems. The cogged design improves flexibility and reduces heat buildup compared to standard wrapped belts, making it well suited for drives with smaller diameter pulleys.

Specifications

• Belt Type: Cogged V-Belt
• Belt Section: BX
• Outside Circumference: 81 in (2057.4 mm)
• Inside Length: 78 in (1981 mm)
• Top Width: 0.66 in (16.8 mm / 17 mm)
• Belt Depth: 0.43 in (10.9 mm)
• Ribs: Single
• Industry Cross-Section Designation: BX78

Compatible Models

Caterpillar (Cat): Fits Caterpillar equipment. Specific model fitment was not listed in product data; verify against your machine's belt routing diagram or OEM part number 2S9911 before ordering.

Replaces Part Number(s):

2S9911

Aftermarket Interchange Numbers

BX78, Gates BX78, Browning BX78, Goodyear 45078, Dayco 435160, Dayco 435403, Dayco 435589, NAPA 25-20550, NAPA BX78, Goodyear BX78, PIX A-BX78, Reliance Electric 108702, Roper 84352, Continental Belt 1/BX78, Grainger 6L284, Dayton Rubber 6L284G, 16CX2060, 17A2055

New aftermarket replacement part - not remanufactured, not used.