The table below provides guidance on identifying and correcting any problems with your Model 730 Series vehicle barrier. Please refer to the HPU O&M manual for more detailed troubleshooting guides referring to the pumping unit. If you encounter problems that you cannot fix, contact B&B ARMR and we will gladly work with you to correct them.
| Symptom | Actions |
|---|---|
| Barrier does not raise up when commanded on control panel | 1. Check power. 2. Check for binding between beam and frame. Check connection of linkage between beam and frame. Check for foreign debris. 3. Check pressure gauge (option not standard on all units). 4. Check overload protector. 5. Manually raise the barrier by using the manual hand crank to see if problem is mechanical or electrical. 6. Check PLC input on pumping unit. 7. Check that safeties are clear. 8. Check PLC output on pumping unit. 9. Check push button operation. |
| Barrier does not close when commanded on control panel | 1. Check power. 2. Check for binding between beam and frame. Check connection of linkage between cylinder and beam. Check for foreign debris. 3. Check pressure gauge (option not standard on all units). 4. Check overload protector. 5. Determine if it is electrical or mechanical by manually lowering the barrier arm. Open the cartridge valve located below the motor on the pump. Push in and turn the blue knob counter clockwise. This will manually dump the pressure in the lines and lower the barrier arm. When finished, push in the blue knob and turn clockwise to engage the cartridge valve to its normal state. 6. Check PLC input on pumping unit. 7. Check that safeties are clear. 8. Check PLC output on pumping unit. 9. Check push button operation. |
| HPU pump will not build up pressure but is running | 1. Check power. 2. Close pressure relief valve. |
| HPU pump will not turn on | 1. Check power. 2. Check motor overload, press start. 3. Check motor starter. 4. Check low level switch. 5. Check pressure switch. |
| Barrier makes noise during operation | 1. Check linkage between beam and frame. Be sure it is secure and properly lubricated (dry graphite spray). 2. Check hinge area for debris and proper lubrication (dry graphite spray). 3. Check hydraulic cylinder clevis pins for lubrication (multi-grade grease). 4. Check bearing grease. |
| Hydraulic unit excessively hot | 1. Check that the pressure relief valve is closed (fully clockwise). 2. Check that the limit switch is adjusted correctly and not allowing the HPU to run excessively. 3. Check for correct voltages. |
| Barrier moves too slowly | 1. Check for mechanical binds. 2. Check flow control valve. 3. In extreme cold temperatures, a higher grade hydraulic fluid may be required to keep viscosity constant. |
| Traffic indicator light does not change | 1. Check proper limit switch operation. 2. Check bulbs. 3. Check PLC outputs. |