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The cooling fan securing nut should be tight enough so that when force
is applied to rotate the fan by pushing on the outer edge and blades
with the palm of your hand (protect the hand with a cloth or a glove),
you should be able to turn the generator and engine without the fan
slipping on the shaft.
If properly torqued and the fan still slips,
replace the lockwashers.
Recirculation of generator cooling air through the generator must be
avoided.
The generator compartment ventilation must be sufficient to
prevent generator air recirculation.
Insure that the screened end bell inlet and the screened discharge
slots at the flywheel are not obstructed, preventing good air cir-
culation through the generator while it is running.
109
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