22U-06-11790 Stepper Throttle Motor for Komatsu Excavator

22U-06-11790 Throttle Motor for Komatsu Excavator

The 22U-06-11790 throttle motor is used for Komatsu excavator throttle control applications. It is also searched as a stepper motor, accelerator motor, governor motor or engine speed control motor for Komatsu compact and mid-size excavator repair.

This page focuses on 22U-06-11790 as the main part number. Before ordering, the removed motor should be checked by old part number, connector plug, cable direction, mounting holes, linkage position and machine serial number.

Komatsu Throttle Control Application

The throttle motor controls engine speed response by moving the throttle linkage according to machine control signals. In Komatsu excavator applications, a weak or incorrect throttle motor may affect idle stability, engine speed adjustment and work mode response.

Common model references for 22U-06-11790 include Komatsu PC60-7, PC70-7, PC128UU, PC128US and PC228UU. These model names should be treated as checking references only. Final fitment should be confirmed by the old motor and machine serial number.

Part Number and Reference Notes

The main part number for this page is 22U-06-11790. The no-hyphen search format 22U0611790 may also be used in buyer searches and supplier catalogs.

Some public listings may mention 22U-06-11113 together with 22U-06-11790 for Komatsu throttle motor applications. This number should be used as a catalog checking reference only and should not be treated as automatic interchange confirmation without checking the old motor, connector and cable layout.

For this product page, 22U-06-11790 should remain the primary search signal. Related references should support fitment checking, not replace the old motor verification process.

How to Identify the Correct 22U-06-11790 Motor

• Check whether the old motor number matches 22U-06-11790 or 22U0611790.

• Compare the connector plug, pin layout and cable direction.

• Check the mounting hole position and motor body shape.

• Compare throttle linkage position, lever direction and cable travel range.

• Confirm the machine model and serial number before shipment.

• Do not select by model name alone if the old motor has been replaced before.

Common Failure Symptoms

• Engine speed does not increase or decrease correctly after throttle command.

• Unstable idle speed or delayed engine speed response.

• Throttle motor does not move when the machine control signal is applied.

• Abnormal clicking, stuck movement or incomplete travel range.

• Fault caused by damaged connector, broken cable, worn gear or linkage obstruction.

• Engine speed control problem caused by controller, wiring or throttle linkage rather than the motor itself.

Troubleshooting Before Replacement

Before replacing the 22U-06-11790 throttle motor, inspect the complete throttle control circuit. A throttle control fault may be caused by the motor itself, wiring, connector contact, controller signal, linkage resistance or incorrect adjustment.

• Check the wiring harness, connector pins and ground condition.

• Inspect throttle linkage for sticking, rust, incorrect adjustment or mechanical obstruction.

• Confirm whether the motor receives the correct control signal during operation.

• Check whether the old motor gear, shaft or cable mechanism is damaged.

• Confirm whether the problem is caused by the throttle motor, controller, wiring or linkage adjustment before ordering a replacement.

Installation and Maintenance Notes

• Turn off machine power before removing the old throttle motor.

• Mark the original cable direction, lever position and linkage connection before disassembly.

• Do not force the linkage if the motor travel direction or mounting position is different.

• Keep the connector clean and dry during installation.

• After installation, check idle speed, high-speed response and full throttle travel range.

• Recheck throttle adjustment if engine speed response is slow or uneven after replacement.

Fitment Check Before Ordering

To reduce wrong orders, please send the old throttle motor number, Komatsu machine model, machine serial number, connector photo, cable direction photo, mounting hole photo, linkage position photo and full motor photo before quotation.

FAQ

Q: What is 22U-06-11790?

22U-06-11790 is a Komatsu throttle motor or stepper motor reference used in excavator engine speed control applications.

Q: Which Komatsu models are common references?

Common model references include Komatsu PC60-7, PC70-7, PC128UU, PC128US and PC228UU. Final fitment should be checked by old motor number and machine serial number.

Q: Is 22U-06-11113 the same as 22U-06-11790?

22U-06-11113 may appear in some public throttle motor listings together with 22U-06-11790. It should be checked by the old motor, connector and cable layout before being treated as a replacement reference.

Q: What should be checked before ordering?

Check the old motor number, connector plug, cable direction, mounting holes, linkage position and machine serial number. Clear photos of the removed motor are recommended.

Q: What can cause throttle motor failure symptoms?

Throttle control problems may be caused by the motor, wiring, controller signal, connector contact, stuck linkage or incorrect adjustment. The complete throttle control system should be checked before replacement.