HOW TO FOR THE OF A IN AN
Though may not drive a cooling fan on most water-cooled , it drives the water pump. In an air-cooled , it often drives the fan that blows air through the cooling fins. In either instance, the helps in the of hence if it breaks the will suffer overheating.
stretches a little in service and should be checked for damage and correct at each service interval. Proper tensioning is important. An over-tight will put too much strain on the bearings of the water pump and generator, while a loose will slip and in time the will go flat because the generator is not turning fast enough.
Methods of tensioning a slack vary; on most the generator is moved away from the cylinder to take up any slack. On a few , however, the generator is fixed and on these a split is used to . Removing spacers from the center of the makes the run nearer the edge and increases the . If the cannot be tensioned fully, it has stretched and must be renewed.
When fitting a new , slacken off all the tensioning adjustment and fit it on the by hand, taking care not to twist the . Once it is fitted to all , it.
HERE ARE STEPS TO THE
1. First twist the and look for cracks or cuts on the vee-section that touches the . If it is damaged, fit a new .
2. If the is sound, see the handbook for the correct method of checking the . If one is not mentioned press the firmly mid-way between the two most widely spaced ; there should be about ½ in (12mm) deflection in the .
3. If your has an unorthodox arrangement, as on the Peugeot 104, you must the maker’s recommended tensioning system. is correct when there is approximately 5/8 in to ¾ in (15mm-20mm) between the belts when they are squeezed together firmly.
STEPS TO THE
A. Where the generator tensions the , use two spanners to loosen the hinge fixings, and slacken off the clamping bolt.
B. Swing the generator away from the to the . Use a wooden lever (a hammer handle will do) between the generator and to get the right .
C. While the is held under , tighten the clamp bolt. Re-check the and if it is correct, re-tighten the hinge fixings.
D. On with split , undo the nuts holding the together and take off the outer half.
E. one packing piece from the center and refit the outer half, with the displaced packing piece on the outside; re-tighten the nuts, taking care not to trap the near the hub.
F. With the assembled, rotate the one revolution before checking the .
STEPS TO FIT A NEW
i. Loosen all adjustments, remove the old belt, and put the new one over the pulleys by hand. It helps to hoop the belt over the crankshaft and generator first, and to rotate the water pump to “wind on” the in the same way as one fits a bicycle chain. Do not use a screwdriver or sharp implement to lever on a tight . If it does not fit bi hand, the is a wrong size, or all the adjustments have not been fully slackened off.
ii. Some have a close-fitting shroud round the cooling fan. On these a small cut-out provides just enough to threads the over the fan, one blade at a time.
iii. With split , first fit the with all the spacers between the halves, then if necessary, subtract spacers until the correct on the has been obtained.
iv. All new belts stretch a little when first used and the should be re-checked after 100 miles, or sooner if stated in the handbook.
Originally posted 2018-07-25 07:19:20.
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