My opener also has 2 wheels on the top of each side of the door: one with a big spool of line and the other just a pulley wheel. So I also lubricated the axles of those spools. You can watch closely while raising/lowering the door to see where the parts spin and move. Now my door runs much quieter, so I must have done something right! Hopefully this will reduce strain on the motor and make it last longer.
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They sent Doug Fussell out to my house on the day after Christmas! I had only called them three days before! Doug was a premier technician, very thorough and very efficient. I expected him to take two days, since he was replacing two doors and adding openers on each door. He only took the daylight hours of one day! I could not believe how fast he was! In addition, he thoroughly taught me how to use the remote openers. I highly recommend them to anyone!