CYLINDER AS-BOOM 5023500 - Caterpillar

The Power Train Electric Drive System and the Accessory Power System will contain hazardous voltage levels during machine operation and for a period of time after machine shutdown.Do not remove any covers that will expose energized electrical components while the engine is operating. Do not remove any covers that will expose the energized electrical components while the components remain energized following an engine shutdown.Do not perform any type of electrical maintenance on the orange hazardous voltage conductors, the power train components or the accessory power system components while the engine is operating.Do not perform any type of electrical maintenance on the orange hazardous voltage conductors, the power train components or the accessory power system components while the components remain energized following an engine shutdown.Always perform the safe shutdown and de-energizing procedure before performing electrical service on the Power Train Electric Drive System or the Accessory Power System.Failure to follow these instructions could result in personal injury or death.
In order to avoid the build up of hazardous live voltages on the exposed surfaces, all grounding wires must be properly connected at all times during engine operation.Any disconnected grounding wires (including the grounding bond wires, the conductor shield wires, the power inverter grounding straps and the component housing grounding straps) must be properly reconnected before the engine is started.Failure to follow these instructions could result in personal injury or death.
Test Step 1. SAFE SHUTDOWN PROCEDUREThis procedure must be performed before the machine is to be serviced to ensure that the DC Power Bus voltage and the DC Accessory Power Bus voltage is at a low voltage level.ReferenceRefer to the Troubleshooting, "Electrical Maintenance Guidelines" section of this manual. Perform the "Safe Shutdown Procedure for Electric Drive Tractors" procedure to verify that the voltage in the power train electrical system has been discharged. Once the DC voltage is indicated to be less than 50.0 VDC, return to this point in this procedure and proceed.Expected Result:The "Safe Shutdown Procedure for Electric Drive Tractors" has been performed. All indications are that the DC voltage has been discharged to less than 50.0 VDC.Results:
OK - The DC voltage is indicated to be less than 50.0 VDC on the Message Display and as indicated by the Hazardous Voltage System Energized Indicator. Proceed to the next test step.
When a connector for the AC system or the DC system is to be initially disconnected from the Power Inverter, use a multimeter to verify that there is less than less than 50.0 VDC between the exposed conductors and frame ground before any disconnection actions are started.
Once the voltage levels of the DC Power Bus and the DC Accessory Power Bus have been verified to be less than 50.0 VDC, proceed to the next troubleshooting test step.
NOT OK - The DC voltage is indicated to be greater than 50.0 VDC on the Message Display or as indicated by the Hazardous Voltage Present Lamp.Repair: Wait for period of at least 10 minutes. Repeat the "Safe Shutdown Procedure for Electric Drive Tractors". If