SPEED SENSOR ASSY

560 375 35B SPEED SENSOR ASSY is essentially the eyes and ears for the control system when it comes to rotational movement. It tells the machine's brain exactly how fast a shaft or gear is spinning, whether that's the engine crankshaft, a pump drive, or even a tramming motor. Without that real-time feedback, the controller wouldn't know if it's hitting the target RPM for a hydraulic pump, or if the engine is truly running at the speed it's commanded. It's crucial for keeping things synchronized and running at their intended pace, which directly affects everything from drilling efficiency to tramming power.

When one of these starts to go bad, you’ll often notice some pretty clear symptoms. Usually, what happens is the signal gets intermittent before it completely drops out. This can cause the engine to hunt for RPM, or you might see the hydraulic pressure fluctuate wildly because the pump controller isn't getting a steady speed input. On a tramming motor, it could lead to jerky movement or the machine going into limp mode because the system thinks it's overspeeding or underspeeding when it's not. Sometimes, you'll get a 'no signal' fault code, but other times it's just erratic behavior that's tough to pinpoint until you start looking at live data from the sensor.

Replacing these isn't usually a big job, but before you just swap it out, always give the wiring harness a good once-over. Corrosion in the connector or a chafed wire is a pretty common culprit for intermittent signals, and it's easy to overlook. Also, make sure the mounting gap to the target wheel is correct – too far and it won't read, too close and it can get damaged. Sometimes, it's just metal swarf or dirt built up on the sensor tip blocking the signal, so a quick clean can sometimes save you a new part. Don't forget to check for any physical damage to the sensor tip itself, especially if it's in an exposed area.