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It changes the direction of movement in a gear system, so that the driver and driven gears move in the same direction.
Gears move about an axis, which means they can only move clockwise and counterclockwise, not left or right. That said, if you have two gears, made to rotate by a motor in opposite directions, and interconnected by a chain of an odd number of gears, then the two motors would work against each other. Depending on the strength of the motors, gears, and axles, the mechanism will either break, not move, or move in the direction forced by the dominant motor.
Move a pulley
Genie does in fact only make garage doors. However, they make garage doors with different opening technologies. Their openers consist of the Screw Drive, a technology to open a garage door without the use of chains, gears, or belts, the Chain Drive, which uses a chain to move the garage door on its track, and the Belt Drive, which uses the same concept as the Chain Drive but with a belt in place of the chain.
If the car is facing up a hill, simply put the car in nuetral. :D When placed in "reverse" an extra gear is added to the chain of gears in the transmission which causes the final drive to the wheels to turn in the opposite direction.
Most riding mowers are driven by a belt.
To remove the accessory drive belt or the serpentine belt from the motor on a 1989 Sunbird, it is necessary to loosen the belt tensioner. Look for a pulley that has a bolt in a slot. Loosen the bolt and move the tensioner so there is a gap in the belt. Then remove the belt from each pulley.
No, while one gear is turning the other the other gear should move the opposite direction. I learned this in robotics class.
no oil in trans
When Dee learned how to drive with a stick shift, the manual action of the clutch helped him move between the gears.
All you need to do is put a wrench on the belt tensioner and move it in the direction that relieves the tension. This will make it possible to remove and install the old and new belt.
On the belt tensioner you will see a spot to insert a half inch drive breaker bar or ratchet to move tensioner off belt.