Look at bladecprepair.com on how to adjust the swashplate. It should be level. Rotor head must be centered on the hub after adjusting the swashplate. Then adjust pitch and tracking.
1. Adjust servo links so that the swash plate is level relative to the main gear. Adjust it so that the rotor head is in the middle of the hub (part it slides on).
2. When swash plate is level, the head may have moved. That changes the pitch. Adjust pitch using the long link from the swash to the bell-hiller arm so that you get zero pitch at throttle min.
3. Now weigh down heli and spin up. View blades from the side. The blades must look like one. If they split in two, increase pitch on low blade.