Throttle motor

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Replacement Throttle Motors for Excavators and Heavy Equipment

Find replacement excavator throttle motors at Fab Heavy Parts for selected Caterpillar, Komatsu, Hitachi, Sumitomo, and other heavy equipment applications. A throttle motor, sometimes described as a throttle governor motor or actuator, operates as part of an engine speed control system, adjusting the associated throttle or governor linkage in response to control inputs.

Our throttle motor collection includes application-specific throttle motor assemblies, stepper motor assemblies, and governor actuators. Different machines may require different motor configurations, electrical connectors, cable arrangements, and mounting designs.

Throttle Motor, Governor Actuator, and Stepper Motor Options

Not all throttle motors use the same operating arrangement. Some listed throttle motor feature cable-operated actuator assemblies, while others are identified as stepper motors or governor motors.

When selecting a replacement, pay attention to the part number of the existing throttle motor, electrical connector configuration, pin count where specified, cable arrangement, and mounting points. These details can affect compatibility even when two motors look similar or are listed for equipment from the same manufacturer.

Throttle Motors for Caterpillar, Komatsu, Hitachi, and More

Fab Heavy Parts offers throttle motor options listed for several excavator applications, including:

  • Caterpillar: Selected 311B, 312B, 312C, 319C, and 320C excavator applications, with product references such as 120-0002 and 247-5211.

  • Komatsu: Selected PC200-6, PC300-6, PC200-7, PC220-7, and PC240-7 applications, including listings associated with the 7834-40 and 7834-41 part-number groups.

  • Hitachi: Selected EX200-5 and ZAX-series excavator applications, including the KP56RM2G-007 stepper motor assembly.

  • Sumitomo: Selected S280 and SH280 applications, including a KHR1713 throttle motor listing.

These are examples of individual product applications, not guarantees of compatibility across entire machine series.

Choosing the Correct Excavator Throttle Motor

Before ordering, compare the part number of your existing throttle motor with the replacement listing. Confirm your excavator model and serial number, then review the electrical plug, pin configuration, cable connections, and mounting arrangement.

If the existing throttle motor's part number is missing, photographs of the existing motor, its connector, and its mounting location may help identify possible replacements.

For more background, read our throttle motor guide. You can also review our Komatsu PC200-7 throttle motor listing for an example of a machine-specific replacement.

Explore the available throttle motors and check individual product details to find an option suited to your equipment.

Need Help Finding the Right Throttle motor?

Can't find the replacement part you need? Send FAB Heavy Parts your part number, engine model, or equipment details. Our team can help review your requirements and provide a quotation.

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Frequently Asked Questions

How do I know which throttle motor fits my excavator?

Start with your excavator make, model, and serial number, then check the part number on the original throttle motor. Compare the replacement throttle motor listing's electrical connector, pin configuration, cable arrangement, and mounting design. Machines within the same model series may use different components, so we recommend confirming the exact configuration before ordering.

Are all excavator throttle motors and governor motors interchangeable?

No. Throttle motors and governor actuators can differ in their electrical connections, control mechanisms, cable arrangements, and mounting points. Some products are identified as stepper motor assemblies, while others use different actuator designs. Even if two parts look similar, you should confirm the original part number and application before treating them as interchangeable.

Can you help me find a replacement if the part number on my throttle motor is missing?

You can provide your excavator make, model, serial number, and any available engine information. Clear photographs of the original throttle motor, electrical plug, cable connections, and mounting points may also help us review possible replacements. Additional measurements or equipment information may be needed before compatibility can be confirmed.

What should I check before installing my replacement throttle motor?

Before installation, compare the new motor with the original assembly. Check the part number, connector shape, pin arrangement, cable connections, and mounting points. Inspect the replacement for visible damage and follow your equipment manufacturer's service instructions for installation, adjustment, and any required setup procedures. Do not assume that all throttle motors use the same installation or calibration process.

Why is my excavator still having engine speed control problems after replacing the throttle motor?

Continued engine speed control problems do not necessarily mean the new throttle motor is faulty. Possible causes include damaged wiring, poor electrical connections, incorrect cable adjustment, linkage problems, or faults elsewhere in the control system. First confirm that the replacement matches the original application, then follow the equipment manufacturer's diagnostic procedures. Avoid operating the machine if engine speed cannot be controlled safely.

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