This is the tower crane of Zoomlion TC5610 that I drove, with five gears for the hook, four gears for the jib, and three gears for the trolley.

This is the tower crane I drove Zoomlion TC7015, the hook five gears, trolley three gears, the big arm does not have gear similar to the motorcycle throttle

Personally, I feel that tower cranes are more or less the same, practice makes perfect work. The same degree of use of the tower crane wear and tear program different operating methods are also different, have to figure out their own, adapt to the tower crane.

In the absence of familiarization with the operation, try to progress gradually a gear a gear transition, and try not to use high-speed gear.

I guess the key you're talking about would be the jib? First gear is slow, but stay in first gear for about 3 seconds will speed up, it is reasonable that the big arm 1~2 gears is enough, there is no need to use high speed gears.

If the trolley has three gears, you need to pay attention to how much the hook wobbles when you follow the hook to use the gears, and use at least 2 gears to follow the hook, because the first gear is too slow.

Hooks are generally hung to 5 gears when the speed will be very fast, and to a gear a gear reduction, if all of a sudden put into neutral will slip hooks, it is recommended that in about ten meters from the ground to the speed of the three gears, feel the slow if you can point to the fourth gear, otherwise the command call to stop hooks when it is too late.

In short, it is more practice can realize the method, there are still unclear can add me and then exchange