Hypoid Reducer selection is good, it is recommended that the reducer test run without load, it should be the load test run. Load in the test should be at the rated speed, respectively, according to the reducer rated load of 25%, 50%, 75%, 100% in four stages slowly loading. And each stage of the operation time to stabilize the temperature of lubricants prevail, in more than 2 hours. Load test reducer, for commutation or not indicate the direction of rotation of the PC gear reducer, should be positive and negative test. For unidirectional reducer, one-way test is allowed, but the direction of rotation of the test must be consistent with the work.