Question about Nordic Track NordicTrack Treadmill, A2550
Tighten the rear roller bolts evenly with the unit off. The correct tension is when you firmly lift up on the right and left edges in the middle of the walking belt and get 2-3 inches gap above the walking board. If one side is looser than the other, the walking belt may wander sideways. Turn the rear roller screw on the side that it shifted to in a clockwise manner(1/2 turn at a time). Test on a low speed and adjust as needed. (you may manually recenter the walking belt with your foot if it shifted too far to one side and is rubbing on the plastic edges.) You likely have a worn motor belt that needs changing or even a pulley on the front roller that is slipping and needs replacing. They all cause slippage.
Posted on Oct 03, 2010
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Posted on Jan 02, 2017
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Check page 27 in the owner's manual:
"If the walking belt slips when walked on, first remove
the key and UNPLUG THE POWER CORD. Using
the allen wrench, turn both rear roller bolts clockwise,
1/4 of a turn. When the walking belt is correctly tightened,
you should be able to lift each side of the walking
belt 3 to 4 inches off the walking platform. Be
careful to keep the walking belt centered. Plug in the
power cord, insert the key, and carefully walk on the
treadmill for a few minutes. Repeat until the walking
belt is properly tightened."
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