08/26/2020
The HB Series 2 machines are some of the most popular Hy-Brid Lifts, but they can be tricky to master when it comes to their voltage readings. When troubleshooting these lifts, it’s much easier to identify your problem when you know what voltage each terminal is supposed to have—and what each terminal is responsible for. To keep your machine running at peak performance, we created this quick “cheat sheet” that includes the voltage readings you should expect to see on your HB Series 2 scissor lift. Before reading it, here are a few things to keep in mind:
| Terminal Number | What It Is | Voltage Reading |
| 1 | Pot Wiper |
Driving Forward: 4.8V |
| 2 | Pot High, Speed Pot | Driving Forward: 4.8V Driving Reverse: 4.8V |
| 3 | Pot Low | 0V |
| 4 | Joystick Trigger | When Squeezing: 24V |
| 5 | Power from Low Control E-Stop | 24V |
| 6 | Right Steer Limit Switch | Turning Right: 24V |
| 7 | Left Steer Limit Switch | Turning Left: 24V |
| 8 | Descent Voltage | When Lowering the Platform: 24V |
| 9 | Fast & Slow Drive Signal | Voltage Will Vary for Driving Speed |
| 10 | Tilt Alarm Power | 24V |
| 11-12 | Elevation Power After Limit Switches | When Elevating the Platform: 24V |
| 13 | Elevation Power Before Limit Switches | When Elevating the Platform: 24V |
| 14 | Upper Control E-Stop Return Voltage | 24V |
| 15 | Lower Control Rocker Switch & Relay Power | 24V |
| 16 | Upper Control Power | 24V |
| 17 | Empty | Empty |
| 18 | Key Switch Power | 24V |
| 19 | Main Power Coming from Pump | 24V |
| 20-22 | Grounds | Grounds |
| 23-30 | Brakes | Brakes |
Even if your machine is running properly, be sure to keep this sheet handy for QA checks. If your machine is down and the voltage is off, give our service team a call at 262-297-5195 and we’ll get you back up and running.

The premier provider of access equipment offering articulated booms, scissor lifts, telehandlers, and vertical masts.