IF the belt is tracking to the right, tighten the right side bolt or screw 1/2 turn and loosen the left bolt or screw 1/4 turn.  Repeat as necessary, this should center the walking belt.
  
Always wipe the treadmill down after each use, perspiration is very corrosive.
  
 
If your treadmill inclines increase the elevation to maximum and vacuum underneath. If it doesn't incline pull it out and vacuum.
 

Most operating problems are usually easily seen, detected and repaired. If the cause of a problem is not obvious, follow a logical process of checking each component in the system.
 
Repair of Your Treadmill
 
I t would be impossible for me to list every problem for every manufacturer’s treadmill in this report, but here are some common problems:
 
** Walking belt is not centered.  See preventive maintenance procedures (page 4) for centering belt.
 
** No power, check that the unit is plugged in to a live outlet, ALWAYS USE CAUTION when dealing with electricity. Try another outlet if you need to.
 
If you know the outlet is live, unplug the unit and check the fuses, you may need to lift the cover for this. IF you have power but the motor does not turn you either have a bad power supply or the motor brushes are worn. Contact the manufacturer for information.

Use this link for the Full Treadmill Report

Treadmill Belts