Do you have the bolt in the cocked and locked position? It has to be cocked and locked down in order for the safety to move. To remove the bolt from the action you need to withdraw it rearward and push the safety full forward. Reverse to reassemble.
Attached is a trigger diagram for the 788. I got it from a poster on another forum. It depicts modifications to add adjustments. It will give you an idea of how the mechanics work.
Attached is a trigger diagram for the 788. I got it from a poster on another forum. It depicts modifications to add adjustments. It will give you an idea of how the mechanics work.