And after I turned the two hex screws for adjusting the belt tension a quarter of a turn tighter, I only here a bump and no movement from the belt....I went a quarter turn looser and even a half and still nothing?????? just bought the thing and having doubts!
I assuming these hex screws are near the rear of the unit. But they should not affect operation unless really out of whack, but they should be adjusted with the belt moving. Try manually moving the belt first.
If it moves and If it is a newer machine more than likely the motor sensor is telling the control board that the motor is not working and it is shutting down as a safety measure.
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There are 2 adjusting screws, one is idle speed and the other is mixture. Adjust the idle screw until it keeps running. That may be all you need. But to check that the mixture is right turn the mixture screw, quarter turn at a time, keep count! until it flutters or speeds up. If it speeds up stop and adjust the idle back a quarter turn at a time until it runs without the blade turning.
Make and model not stated. Most machines have a dial for upper thread tension. Higher the number, the tighter the tension.
Bobbin tensions can also be adjusted, but it is not recommend that sewing novices attempt to adjust bobbin tension. (Bobbin tensions are very sensitive and a slight quarter-turn will usually make a big impact. Plus, one should know how to return it to its original position if/when things go awry.)
Set the speed on the treadmill at 2 MPH, If the
walking belt has shifted to the left, use the hex
key to turn the left idler roller screw located on rear
of walking deck clockwise 1/4 of a turn; if the walking
belt has shifted to the right, turn the left idler roller
screw clockwise 1/4 of a turn. Be careful not to
overtighten the walking belt. Always wait to see if the
belt moves as your turning the screws. Take your time
in adjusting belt.
You have not properly aligned and / or adjusted the tension. If it is SLIDING then you do not have enough Rear Tension. Once you get the right amount of REAR TENSION, then you have to adjust the left right (balance the belt). Your belt should go straight, right now you have it too far to the FRAYED SIDE. Turn the Machine on, have your Hex Wrench in the Bolt and turn it slowly CW and as the belt come back to Center, watch the adjustment. If it continues to go past, then loosen it a little until you have the right balance. Remember REAR TENSION FIRST... THEN BALANCE for Alignment
If belt hesitates or slips when walking on unit it may be caused by either a loose walking belt or a loose drive belt. To determine the cause
perform the following test: Stand beside Tread-Climber® fitness machine and set speed to 2 MPH. Step on one treadle and attempt to stop
movement. If one belt stops but roller at rear and other belt continue to turn walking belt tension should be adjusted. If both belts stop but motor is still turning the drive belt tension should be adjusted.
Adjust walking belt tension at the front of the unit using the provided hex wrench on the exposed adjustment bolts located on each side of each
front roller. Be sure to adjust both bolts on each roller the same amount as to not disrupt belt alignment. Tighten (turn clockwise) each adjustment bolt in full turn increments. After each adjustment, restart unit and check to see if belt slippage has been eliminated. Repeat if necessary.
If it doesn't have an automatic belt tensioner there will be an adjustment screw on either the alternator or power steering pump (possibly both if there are two belts). Loosen the two mounting bolts securing the accessory (ie: alt or p/s pump) and tighten the screw. Once adequate tension is on the belt tighten the mounting bolts.
Sometimes the adjustment is on a seperate pulley and not one of the accessories. If this is the case, loosen the center bolt on the pulley and tighten the adjustment screw. Once tight, tighten the center bolt.
If you have an automatic tensioner there are no adjustments to make the belt tighter.