7861-92-4130 Potentiometer Sensor for Komatsu Excavator PC120-5 PC200-5

7861-92-4130 Throttle Position Sensor for Komatsu PC200-5

The 7861-92-4130 throttle position sensor is supplied for Komatsu excavator throttle motor position feedback and engine speed control system repair. It is commonly requested as a throttle position sensor, potentiometer angle sensor, fitting sensor, position transmitter or throttle motor locator sensor for Komatsu PC200-5 and related excavator models.

This page focuses on 7861-92-4130 as the main part number. The no-hyphen format 7861924130 may appear in buyer searches and parts lists, while 7861-92-4131, 7861-92-4132 and 7861-92-4133 may appear as related checking references. Final fitment should be confirmed by the old sensor number, plug type, wire count, sensor shape and machine information before ordering.

Part Number and Product Type Clarification

This product should be positioned as a throttle position sensor or potentiometer angle sensor rather than a complete throttle motor actuator assembly. In the throttle control system, the sensor helps provide position feedback so the control system can recognize throttle movement or actuator position.

Some buyers may search this item using terms such as fitting sensor, throttle motor locator, position sensor, angle sensor or TPS sensor. These search terms can be covered in the description, but the page should keep 7861-92-4130 as the main part number signal.

Because similar Komatsu throttle sensors can use different plugs, wire layouts or sensor housings, do not order by the short model name alone. Compare the removed sensor before quotation or shipment.

Application Reference for Komatsu Excavators

The strongest model reference for this page is Komatsu PC200-5. Market references may also connect 7861-92-4130 with Komatsu PC220-5, PC120-5, PC200-6, PC220-6, PC200-7, PC300-7 and other Komatsu equipment using similar throttle position feedback parts.

These model names should be treated as application references, not as the only fitment proof. Older excavators may have previous repair history, different throttle motor assemblies or different sensor plug versions.

For accurate ordering, confirm the old sensor part number, excavator model, machine serial number, plug shape and wire layout before shipment.

How to Confirm the Correct 7861-92-4130 Sensor

Throttle position sensors are small components, but wrong plug type or sensor version can cause installation problems. Before ordering, check the removed part carefully.

• Confirm whether the old sensor number is 7861-92-4130 or 7861924130.

• Compare the plug shape, pin layout and wire count.

• Check whether the sensor is used as a throttle motor locator or angle feedback sensor.

• Compare the mounting holes, sensor body shape and connector direction.

• Confirm the machine model and serial number before ordering.

• Send clear photos of the old sensor, plug and installation position if you are not sure.

Common Failure Symptoms

A throttle position sensor may need replacement when the excavator has unstable engine speed, delayed throttle response, incorrect throttle position feedback, engine speed hunting, abnormal idle control or throttle control fault symptoms.

These symptoms are not always caused by the sensor itself. Wiring harness damage, loose connector pins, actuator motor failure, controller signal problems, poor ground connection or mechanical throttle linkage issues can create similar problems.

Before replacing the sensor, inspect the plug, harness, power supply, ground signal and throttle motor movement. Replacing only the sensor may not solve the fault if the actuator or wiring circuit is damaged.

Troubleshooting Before Replacement

Before ordering a 7861-92-4130 replacement sensor, check the electrical and mechanical throttle control system. This helps repair shops and equipment owners avoid replacing the wrong component.

• Inspect the connector for corrosion, looseness, oil contamination or broken pins.

• Check the wiring harness between the sensor, throttle motor and controller.

• Confirm whether the throttle motor moves smoothly without sticking.

• Measure the sensor output according to the service procedure if testing tools are available.

• Check for broken mounting points, water damage or sensor body wear.

• Confirm whether the fault follows the sensor after comparison or testing.

Installation and Maintenance Notes

Before installation, turn off the machine power and inspect the connector area. Keep dust, water, oil and metal particles away from the plug and sensor body.

Compare the replacement sensor with the removed unit before installation. Do not force the plug if the connector shape or pin layout is different. After installation, check throttle response, idle stability and engine speed control.

For long service life, keep the throttle motor area clean and avoid pulling the harness during repair. If the machine works in wet or dusty conditions, inspect the connector sealing condition during maintenance.

Buying Notes for Repair Shops and Parts Distributors

For repair shops, this 7861-92-4130 sensor is suitable for Komatsu excavator throttle control troubleshooting when the old sensor is damaged, unstable or unable to provide correct position feedback. For distributors, it can be supplied as a small electrical replacement part for Komatsu excavator service demand.

Topvelsun supports small repair orders and bulk inquiries. To improve quotation accuracy, please send the required quantity, old sensor number, machine model, serial number and photos of the plug, sensor body and installation position.

FAQ

What is the main product on this page?

This page is for the 7861-92-4130 throttle position sensor, also described as a potentiometer angle sensor or throttle motor locator sensor for Komatsu excavator references.

Is 7861924130 the same search reference as 7861-92-4130?

7861924130 is the no-hyphen writing format of 7861-92-4130. The main part number of this page should remain 7861-92-4130, and the removed sensor should still be checked before ordering.

Is this a complete throttle motor actuator?

No. This product should be described as a throttle position sensor or potentiometer sensor, not a complete throttle motor actuator assembly. Please compare the old part before ordering.

Which Komatsu models are common references?

Common references may include Komatsu PC200-5, PC220-5, PC120-5, PC200-6, PC220-6, PC200-7 and PC300-7. Final confirmation should be based on old sensor number, plug type and machine information.

What should I check before ordering?

Please check the old sensor number, plug shape, pin layout, wire count, mounting holes, sensor body shape and machine serial number. Clear photos of the removed sensor are recommended.

What can cause repeated throttle control problems?

Repeated problems may be caused by wiring harness damage, loose connector pins, water or oil contamination, throttle motor actuator failure, controller signal problems or incorrect sensor version.