|With capacitor trimmers, 1 turn is a good place to start. However, messing around with the trimmers to get reception is pretty much shooting in the dark. Follow the advice I gave you and let us know how far you get. Start at the speaker and work your way back until you can't get a signal to go through (from your signal generator or finger). That is a logical straight-forward way of going about it. Once you can't get a signal, the trouble most likely lies within that stage. You CAN find the trouble. Aside from measuring capacitors and resistors, IF transformers should usually have from about 10 to 80 ohms resistance. FM IF transformers will generally be less than this, but you're not dealing with FM in this radio.
This procedure will usually solve just about every "doesn't work" problem that arises on this forum.