The generator and centrifugal fan are V-belt-driven through pulleys: the centrifugal oil filter cover/pulley on crankshaft transmits the drive to the pulley on generator.
Belt tension is correct when, under a hand pressure of about 22 lbs (10 kg), the belt sags l3/32"(1 cm)
(fig. to the left:A= Normal give-in B= Nuts securing the pulley halves with spacer rings.)
A slackened belt slips and will not drive the generator and centrifugal fan at the required speed.
Under these conditions the belt will wear rapidly. Conversely, a too-tight belt induces an abnormal
strain on generator bearings.
To permit the adjustment of belt tension, the pulley on generator is demountable in two halves between which spacer rings are squeezed. Tension is increased or reduced by reducing or increasing the number of spacer rings, respectively.
Place the spacer rings removed from between the pulley halves on pulley outer face so that rings may be reinserted when fitting a new belt.
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