To lift the cab on a 5-tonne Hitachi excavator, please follow these steps:

1.Ensure that the excavator is parked on a level surface and the engine is turned off. Engage the parking brake for added safety.

2.Locate the cab lifting points. These are usually marked on the excavator's frame or specified in the operator's manual. The lifting points are typically reinforced areas designed to safely support the weight of the cab.

3.Prepare the lifting equipment. You will need a suitable crane or lifting device capable of safely lifting the weight of the cab. Ensure that the lifting equipment is in good working condition and rated for the load.

4.Attach the lifting equipment to the designated lifting points on the excavator. Follow the manufacturer's instructions for properly securing the lifting equipment to the cab lifting points. It is important to use appropriate rigging techniques and ensure a secure connection.

5.Double-check the connections and ensure that the lifting equipment is properly balanced and aligned with the cab lifting points.

6.Slowly and carefully activate the lifting equipment to start raising the cab. Use the controls of the crane or lifting device to lift the cab smoothly and evenly. Avoid sudden movements or jerks that could cause instability or damage.

7.Monitor the lifting process closely. Ensure that the cab is being lifted evenly and that there are no signs of strain or imbalance. If any issues or concerns arise, stop the lifting operation immediately and assess the situation before proceeding.

8.Lift the cab to the desired height, allowing enough clearance to perform the required maintenance or repairs.

9.Once the cab is lifted to the desired height, secure it in place using appropriate safety measures, such as support stands or blocks, to prevent accidental lowering or movement.

10.Complete the necessary maintenance or repairs while the cab is lifted, following the appropriate procedures outlined in the operator's manual or as required for the specific task.

11.When finished, carefully lower the cab back down using the lifting equipment. Ensure that the cab is lowered evenly and smoothly until it rests securely on the excavator's frame.

12.Double-check that the cab is properly seated and secured before removing the lifting equipment.

Please note that these steps provide a general guideline for lifting the cab on a Hitachi excavator. It is essential to consult the operator's manual for your specific model and follow any manufacturer's instructions or safety guidelines provided. If you are unsure or inexperienced with this procedure, it is recommended to seek assistance from a qualified professional or contact the manufacturer for guidance.