The wrench fits into the engine inspection door and is turned to fit onto the nut to be loosened or tightened. The other end fits on the adjacent nut to take up the reaction of the wrench. A downward pressure should be applied to the handle to keep the socket engaged on the nut. At least two studs per 16 cylinder engine should be checked for proper stretch by using the T23094
Main Bearing Stud Stretch Gage. This wrench is equipped with dual controls for 16, 12 and 8 cylinder engines. Eight cylinder engines require less stud stretch.
This wrench is also available in a 230 V unit : T21060
This unit consists of a hydraulic wrench, 1 1/2 hp, 10,000 PSI, motorized hydraulic pump with pressure gauge, 25 feet hydraulic hose and control cable. It is mounted on a rubber tire cart for ease of mobility.
When using the TIGHTEN push-button, the hydraulic pressure is controlled by a pressure switch set to a predetermined pressure, thus giving the required stud stretch. The pressure setting to give the required stud stretch is preset at approximately 6200 PSI for 12 and 16 cylinder engines and 5775 PSI for 8 cylinder engines. The LOOSEN push-button bypasses the mentioned pressure switch, allowing more torque to be applied to the nut while loosening.