Can you show a picture of the pipe without the motor
The motor is now assembled again. Sorry I forgot to take a photo of the motor, but I can take one tomorrow.
How did you determine that the arm is stuck, but the motor is OK?? Bench setup with two or more 12 volt battery's or power supply?
How old is the dish/motor?
Yes, I did use a a 24 volt power supply, The motor drive it´s very easy to separate from the arm, (just one bolt) the dish is about 31 years old but I did restore it to new condition, because its a Channel Master... this motor has 30 years old.
Taking the gearbox is recommended first , if only to remove any water that might be lying at the base of the drive
The usual unstick is to lock the worm drive by clamping in a vice and unscrew (anticlockwise) the top end with a 3/8 extension bar through the bolt hole. There are more issues that arise if the actuator is already extended to maximum travel.
That´s what ive done.
that giant spiral screw had a lot of rust and corrosion but i did clean it very well, the only problem is the shaft has a little bit of play, about 2 or 3mm when I push it or pull it. The culprit seems to be that thing like a nut where the spiral works. It´s made of a softer material than the big spiral screw.
After lubricating everything it works...but it´s noisy, grinding noise...from the arm.
I didn´t change the bottom bearing because I dont have anything to clamp and secure the giant screw, to remove the lock nut at the shaft end. the bearing is damaged with a lot of rust, it can rotate now, and I did fill it with bearing grease.
The motor alone, drive and gears, is very quiet.