Packing seal and rotate the shaft of the pump. There is an unusual high temperatures while working.Water cooling pumps up for lower temperature rise due to come back inside the air pump.
Packing seal and the shaft of the pump. Abnormally high temperature While the water is pumped up the coolant. For precooling was not reached due to the stale air within the pump.
Packing seal and spindle of pump, high temperature, abnormal, while the work water sucked up coolant for reducing the temperature, not because the air lodged inside the pump.