What Is a Throttle Motor?

A throttle motor — also known as a stepper motor or throttle actuator — is a critical electromechanical component in modern excavators that precisely controls the engine’s throttle opening. It serves as the bridge between the machine’s electronic control unit (ECU) and the engine’s fuel injection pump, converting digital commands into mechanical movement.

Unlike traditional mechanical throttle linkages operated by hand levers, the throttle motor enables electronic throttle control , allowing the excavator’s onboard computer to automatically adjust engine speed based on load conditions, operator input, and hydraulic demand.

Kaye Throttle Motors: Quality You Can Trust

At Kaye Machinery Parts, we manufacture high-quality throttle motors designed to meet or exceed original equipment specifications. Our product line covers a wide range of excavator brands and models, ensuring reliable performance and long service life.

Kaye Features of Kaye Throttle Motors

Precision Engineering: Manufactured with tight tolerances for accurate throttle positioning and smooth operation
Durable Construction: High-quality materials and robust housing withstand harsh construction site environments, including dust, vibration, and temperature extremes
Original Chip Integration: Equipped with original-grade electronic chips for reliable signal processing and extended service life
Reinforced Wiring Harness: Stainless steel wire rope and abrasion-resistant sheathing ensure durability in high-wear areas
Plug-and-Play Installation: Direct replacement for OEM units, with matching connectors and mounting points for hassle-free installation
Comprehensive Model Coverage: Compatible with major excavator brands including Komatsu, Hitachi, Caterpillar, Sany, Hyundai, and more

Popular Compatible Models

Kaye throttle motors are available for a broad range of excavator models, including but not limited to:

Komatsu: PC200-7, PC220-7, PC200-8, PC300-7, PC360-7 (e.g.7834-41-2000/7834-41-2001/7834-41-2002 )
Hitachi: EX200-5, EX220-5, EX300-5, ZAX200-6, ZAX240 (e.g., 4614911/4360509)
Caterpillar: 320C, 320D, 325C, 330C (e.g., 7Y-3913/4I-5496)
Sany: SY215, SY235, SY335, SY365(AC2/2000,AC2/1500,AC2/1000)
Hyundai: R210-7, R220-7, R215-9, R225-9(21EN-32260)
Kobelco: SK200-6, SK200-8, SK250-8, SK350-8(YN20S00002F3/YN20S00002F1)

Not sure which model fits your machine? Contact our technical support team with your excavator’s brand, model, and serial number, and we will help you identify the correct replacement part.