1957336 Harness Fits Caterpillar Models

One New Aftermarket Replacement Engine Wiring Harness for Caterpillar (Cat) Equipment with 3126B Engine

This engine wiring harness (OEM designation: HARNESS AS-ENGINE) serves as the main electrical backbone for the Caterpillar 3126B diesel engine, transmitting power and signals between the engine control unit (ECU) and sensors, actuators, and ancillary components to support accurate engine management and diagnostics. It is a direct plug-and-play replacement for the factory harness across a wide range of Cat excavators, track loaders, wheel loaders, track-type tractors, motor graders, pipelayers, and other equipment powered by the 3126B engine.

Compatible Models

Caterpillar Excavators: 322C, 322C FM, 325C, 325C FM, 325C L, M325C MH

Caterpillar Track-Type Tractors (Bulldozers): D5N, D6N

Caterpillar Track-Type Loaders: 953C, 963C

Caterpillar Wheel Loaders: 938G II, 950G II, 962G II

Caterpillar Integrated Toolcarriers: IT38G II, IT62G II

Caterpillar Motor Graders: 120H, 135H

Caterpillar Pipelayer: 561N

Caterpillar Wheel Harvesters / Forest Products: 570B, 580B

Caterpillar Engine - Industrial / Generator Set: 3126B, SPP101

Replaces Part Number(s):

1957336, 195-7336, CA1957336

Aftermarket Interchange Numbers

381-2499, 3812499

New aftermarket replacement part - not remanufactured, not used.