A video I made when the mobile crane is equipped with power functions as per the last few pages of the instructions. Part 1 shows why I would later remove the clutch gear from the mobile crane; there is simply too much torque required to extend and raise the boom at the same time and hence the clutch will slip. Part 2 will show the capabilities of the crane without the clutch gear.

Part 1 of 2

Lego 8053 Technic Mobile Crane Part 1 of 2

Part 2 of 2

Lego 8053 Technic Mobile Crane Part 2 of 2

Thanks for your demo paanjang16! I'm relying on your post to understand further as I have not plan to buy this set.