Question 75Refrigeration & AC - 1st Asst/Chief

The correct answer is A) premature wear of both the pulley end motor shaft bearing and the pulley end compressor crankshaft main bearing due to overloading. Explanation: Excessively tight drive belts installed between a motor and a refrigeration compressor pulley will create excessive tension and load on the motor shaft bearing and the compressor crankshaft main bearing. This overloading can lead to premature wear and failure of both the motor shaft bearing and the compressor crankshaft main bearing. The other answer choices are incorrect because: B) Belt slippage would not occur with excessively tight belts. C) and D) Only one bearing would not experience premature wear.