Step 0 - Disconnect the Power!
Disconnect the power to avoid shock, damage, injury, or death!
Step 1 - Remove Lint Filter and Pop The Top of the Dryer
Remove the lint filter and then remove two screws that hold the lint filter housing to the dryer top, as shown below on the left. Use a flat head screw driver to apply a bit of pressure to pop the top, as shown below right.
Step 2 - Support the top.
Use a rope to secure the top from above as shown below to avoid damaging the wires. This is especially needed in this model since the opening around the wire could easily damage or even shear off wires if the top fell over.
Step 3 - Disconnect the door switch and remove two front bolts.
In the lower left photo, you see a wire connection to the door switch - this must be disconnected - just lift the plastic tab a little to allow the connection to be pulled apart. Then remove two bolts on the top inside of the dryer front, one bolt on each side, as shown below.
Step 4 - Remove the dryer front.
Once the two bolts of Step 3 are removed, you may lift away the dryer front. A short upward motion will easily free it from two lower hangers. Take care not to let the drum fall out - support it with something or have a friend help out.
Step 5 - Lift out the drum if needed. Make repairs as needed.
To do lift the drum out, you will need to first remove the belt from the motor and idler pulley as shown in the photo below. Then simply grab the drum and lift it out and away. Once the drum is out you have easy access to all parts within the cabinet. You can make some repairs with the drum in place, such as replacing the idler pulley or front felt ring. From the looks of it, the flimsy plastic pulley that is provided will only last 3-6 years before cracking up from the heat. To replace a broken belt, pull the drum, place the new belt over it, and then thread the belt over the idler pulley as shown above while either someone holds the drum in place or you support it some other way. Parts for this dryer may be purchased at this link.
Step 6 - Reassemble dryer by reversing steps 1-5.
To get the front on, it might be helpful to have someone hold the drum in place, although I was able to get the front on fairly easily alone.
Note: There is a bit of confusion on whether this is Model medc400vwo or medc400vw0 (O vs. zero?) I would try both numbers. The Sears site used a zero but I have seen some search results use an "o".