1. Install the machine slot. When installing the machine slot, the machine slot bracket can be temporarily fixed with embedded bolts or embedded steel plates, and the spare slot is integrated. After overall leveling and alignment, it can be fixed with embedded bolts or embedded steel plates.

2. Install the head bearing seat, the middle bearing seat and the spiral drum. The first and second bearing seats are separated from the fuselage. The first end bearing seat and the middle bearing seat shall be temporarily fixed, and the bearing seat shall be fixed after the spiral drum is installed, leveled and aligned.

3. Install the drive frame, reducer and motor. Firstly, check the arrangement position and height of the anchor bolts of the driving frame according to the leveled center line of the spiral shaft, then install the driving frame, level and align it with the shim, and finally fix it reliably with the anchor bolts.