2. INSPECTION AND ADJUSTMENT (2) V-belt tension check When there is not enough tension in the V-belt, the V-belt will slip making it impossible for the alternator to generate power and cooling water pump and cooling fan will not work causing the engine to overheat. Check and adjust the V-belt tension (deflection) in the following manner. [NOTICE] Be especially careful not to splash engine oil on the V-belt, because it will cause slipping, stretching and aging of the belt. 1) Press the V-belt with your thumb [approx. 98N {10kg}] at the middle of the V-belt span to check the tension (deflection).
Available positions to check and adjust the V-belt tension (deflection) are at the A , B or C direction as shown in the illustration right. You may choose a position whichever you can easily carry out the check and adjust- ment on the machine unit. "New V-belt" refers to a V-belt which has been used less than 5 minutes on a running engine. "Used V-belt" refers to a V-belt, which has been used on a running engine for 5 minutes or more. The specified deflection to be measured at each position should be as follows. (Unit: mm) 2) If necessary, adjust the V-belt tension (deflection). To adjust the V-belt tension, loosen the set bolt and move the alternator to tighten the V-belt.
After replacing with a new V-belt and adjust- ing it, run the engine for 5 minutes and read- just the deflection to the value in the table above. 3) After replacing with a new V-belt and adjusting it, run the engine for 5 minutes and readjust the deflection to the value in the table above. 4) Visually check the V-belt for cracks, oiliness or wear. If any, replace the V-belt with new one. 82E-5 – 98E-5 SERIES 2-7 Direction A B C For used V-belt 10 – 14 7 – 10 9 – 13 For new V-belt 8 – 12 5 – 8 7 – 11