22630-44B20 Komatsu Sensor for K21 & TB45 Forklift Engines

Overview

The 22630-44B20 SENSOR is a Komatsu replacement sensor designed for K21 and TB45 series forklift engines. Sensors like this one feed real-time data to the engine management system, helping keep fuel delivery, ignition timing and overall performance within specification. When a sensor starts to fail, operators often notice erratic running, warning codes, hard starting or rising fuel consumption. Fitting the correct 22630-44B20 SENSOR promptly helps prevent unplanned downtime and protects more costly engine components from secondary damage.

Manufactured to Komatsu’s design standards for fit and function, this sensor is a dependable choice for maintenance teams, fleet managers and parts departments servicing Komatsu-powered forklifts.

Compatibility

The 22630-44B20 for K21-181-A and related engines covers two Komatsu engine families:

• K21 engine series: K21-181, K21-184 and K21-187 engines in both -A and -B configurations, plus the K21-1X3-TO variant
• TB45 engine series: the TB45-1 engine used in heavier Komatsu forklift applications

Before ordering, we recommend confirming the engine model and serial number on your unit’s identification plate. If your forklift runs a K21-181-A, K21-184-B, K21-187-A or another compatible engine listed above, this sensor is the correct match. Not certain? Send us your engine number and our team will verify fitment before you order.

Quality and Reliability

Engine sensors work in one of the harshest environments on a forklift: constant vibration, heat cycles, dust and moisture. The 22630-44B20 SENSOR is built to Komatsu’s specifications, delivering accurate, stable signal output so the engine control system can respond correctly under changing loads. Consistent signal quality supports smooth idling, responsive acceleration and efficient fuel use throughout long duty cycles.

Choosing a sensor matched precisely to your engine series, rather than an unverified substitute, reduces the risk of repeat faults and unnecessary workshop visits.

Installation and Maintenance Tips

• Confirm part number 22630-44B20 against your Komatsu service manual before removing the old unit.
• Disconnect the battery and let the engine cool fully before starting work.
• Compare the new sensor with the old one: the connector type, thread and overall length should match.
• Install to the torque value specified in the service manual, as over-tightening can damage threads or the sensor body.
• Inspect the wiring harness and connector for corrosion, chafing or bent pins, a common cause of sensor faults.
• Clear stored fault codes after installation and run the engine to confirm a stable reading.

Why Order from Us

forkliftpartssearch.com specializes in forklift parts, with deep coverage of Komatsu engine components. When you order the 22630-44B20 SENSOR from us, you get accurately listed part numbers, knowledgeable support to confirm compatibility with your K21 or TB45 engine, and a broad catalog of related forklift parts so you can consolidate maintenance orders in one place. Our team is ready to help you identify the right part the first time and keep your equipment productive.