If your 3 point hitch won't lift, there are a few things that could be causing the problem. The first thing to check is the hydraulic fluid level. If the fluid is low, it won't be able to provide the necessary pressure to lift the hitch. Another possibility is that the hydraulic cylinder or lift arm could be damaged or frozen. If the cylinder is damaged, it will need to be replaced. If the lift arm is frozen, you may be able to thaw it out with a heat gun. Finally, the problem could be with the 3 point hitch itself. If the hitch is bent or damaged, it will need to be replaced.