What is the correct way to use a wrench?

[LaFrank]

Here are the specific usage methods for different types of wrenches: 1. Type A (integral) torque wrench. 1.1 Setting the torque value. (1). Rotate the locking handle counterclockwise to loosen the adjustment wheel. (2) Turn the adjustment wheel so that the sum of the main scale and the auxiliary scale (adjustment wheel scale) readings equals the torque value you need to set. (3) After setting the torque value, tighten the locking handle clockwise to complete the torque value setting. 1.2 Insert the square drive of the wrench into a socket of the corresponding size. 1.3 Place the socket onto the nut or bolt head. 1.4 Apply force evenly in a clockwise direction. 1.5 When you hear a "click" sound or feel the wrench release force, the set torque value has been reached. 1.6 When tightening long bolts or nuts such as oil pipes where the socket cannot be used, it is necessary to replace the open-end head. (1) Press the locating pin at point A as shown in Figure 3 and apply force in the direction of removal to detach the wrench head. (2) Insert the selected open-end head of the corresponding size into the wrench handle and rotate it so that the locating pin snaps into the small hole of the wrench head for positioning. 2. Type B (split-type) torque wrench. 2.1 Installation: As shown in Figure 4, first insert the adapter socket component into the wrench head hole and rotate it so that the locating pin snaps into the hole for positioning. Similarly, connect socket component II to adapter socket component 1 via the locating pin to complete the assembly. 2.2 Setting the torque value. (1) Torque wrench with rear cover. a. Press the rear cover locating pin and remove the rear cover. b. Insert the adjustment tool into the tail adjustment bolt and turn the adjustment handle so that the sum of the main scale reading and the auxiliary scale reading equals the required torque value. c. Remove the adjustment tool, install the rear cover, and ensure the locating pin snaps into the rear cover hole. (2) Torque wrench with adjustment wheel: a. The torque value setting method is the same as for the Type A torque wrench. b. Except for installation and torque value setting, the remaining operation steps for the Type B torque wrench are the same as steps 2-6 for the Type A.