Pulls to the left under braking

I have a problem. I just serviced my front calipers and cleaned/adjusted my rear drums. Now that they are working good again, i noticed that it pulls to the left under hard braking. I.e. nose dive braking, it dives to the left. I don't know what it could be. Could it be that since the sliders are moving free, it shows that there is an imbalance in the front brakes? Could it be my brakes need a bleed???

Check the front pads. Did you get grease or break fluid on one of them? You might want to take the pads out, wash them in water based degreaser and wipe down the rotor with degreaser. You could have a extreme pull if one of the hoses going to the calipers is pinched or plugged. What is the wear on the pads? Are you sure you put the pads back exactly as you took them off. Didn't switch wheels or sides. Buying new pads may solve your problem if the old ones are worn.