rear bearing

I got a new rear bearing for the dryer,I lifted the top and took off front panel. I then released the belt from the motor pulley I cannot get the drum to come out,I tried lifting it with the belt it will not come out ,what am I doing wrong?

Just give it a good yank upwards or just reach inside and remove the 3 screws holding the drum bearing on.

I changed the thermal high limit and the sensor that turns the heat on at 130 deg., and off at 160. When that didn’t work, I changed the flame sensor. Then i found the schematic. I checked the resistance of the ignitor, and the coils on the gas valve solenoids. The assist coil measured at 2K, instead of 560 ohms, so I replaced that. From what the schematis shows, the only other switch on the line is the timer itself. The only other part of the burner assembly that I can see it being is the gas valve itself. Both parts are expensive, I want to be sure I get it fixed this time. Please help - Thank you.