Question about Bowflex Treadmill Series 7

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Rhythmic thumping noise with increased speed

Brand new treadmill, just set it up. When you increase the speed greater at 1.5mph, you hear a thumping noise towards the back of the treadmill, very rhythmic in sound, similar to sound of a heartbeat just louder. treadmill has been calibrated and passed, but sound remains and if you increase speed higher, sound remains just occurs more often but carries same rhythm.

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  • Anonymous Mar 18, 2014

    i have fitted a new belt to my treadmill and have lubed bearings as best i can and when at walking speed its fine but when increase speed it whines quiet loud

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  • 12 Answers

The problem is the rear roller has a bad bearing and needs to be replaced

Posted on Mar 16, 2009

  • medalwinner Dec 13, 2010

    Not correct, they all make this sound (we have installed hundred's). The belt is brand new, just use the unit, by hour 50 it will be gone. Do NOT tighten the belt to reduce the noise, it will prematurely burn up the motor.

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Posted on Jan 02, 2017

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please see the video and lube the rollers bearing front+back too
2) Run the software calibration for easy diagnostic with sensor speed.and fix it.
Steps for Newer Style Console Calibration
1. Locate the calibration area on the rear or underside of the console (a hole, near the console's center, that goes through to the electronics board. (This hole should not have a screw in it.)
2. Insert a pencil (eraser end), into the hole and feel around for the cal button (will click when pressed).
3. Press the button 2 times (with the pencil eraser). The first click should show CL11 in the console, the second click should show CL21.
4. If the process was done correctly, and CL21 appears in the console, you are in "calibration mode." The next few steps consists of pressing buttons on the console and observing settings. This will not require any other tools.
5. Press ENTER. CL22 should display in the TIME window and (??) in the SPEED window.
6. Press ENTER. CL23 should display in the TIME window and (??) in the SPEED window.
7. Press ENTER. CL24 should display in the TIME window and (??) in the SPEED window.
8. Press ENTER. CL25 should display in the TIME window and (??) in the SPEED window.
9. Press ENTER. CL26 should display in the TIME window. You should then see the letter "E."
10. Press ENTER. You should see "SS" or "55" in the console.
11.Push the STOP/START button. For safety, at this point, you should step off, or be off, the treadmill.
12. Push the ENTER button. The walking belt should start to move, accelerate to maximum speed, then stop on its own.
13. When the belt stops, the incline should self test by raising to its highest incline position, then lowering back down to its lowest position.
14. Once the incline test is complete, push the POWER button 2 times. The unit should shut off and the console should go completely blank. If this happens, the treadmill is done calibrating and is ready for use.
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