Scheme 135
Scheme 136
Scheme 137
- Verify the customer concern by operating the system.
- Visually inspect for obvious signs of mechanical damage. VISUAL INSPECTION CHART Mechanical Damaged or contaminated belt Belt tension Belt tensioner Belt idler Pulleys Loose hardware
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step. NOTE: Up to 15 cracks in a rib over a distance of 100 mm (3.93 in) can be considered acceptable. If damage exceeds the acceptable limit or any chunks are found to be missing from the ribs, a new belt must be installed. Under no circumstances should the belt or tensioner be lubricated as potential damage to the belt material construction and tensioner damping mechanism can occur.
- The condition of the drive belt should be compared against the illustration and appropriate action taken. Small scattered deposits of rubber material. This is not a concern, therefore, installation of a new belt is not required. Longer deposit areas building up to 50 percent of the rib height. This is not considered a concern but it can result in excessive noise. If noise is apparent, install a new belt. Heavy deposits building up along the grooves resulting in a possible noise and belt stability concern. If heavy deposits are apparent, install a new belt.
- Check the belt for cracks. Up to 15 cracks in a rib over a distance of 100 mm (3.93 in) can be considered acceptable. If cracks exceed this standard, install a new belt.
- There should be no chunks missing from the belt ribs. If the belt shows any evidence of this, install a new belt.
- If the concern is not visually evident, verify the symptom.
See also:
• SPECIFICATIONS