Torque Wrench.

Use And Care Of Handtools And Measuring Tools
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(8) Torque Wrench. A torque wrench enables you to set up a nut or

bolt when the force applied to the handle reaches the specified limit.

Manufacturers' instructions specify these limits of turning force. Cylinder

head nuts and bolts, rod bearing cups, and other places on automotive and

airplane engines usually require torque wrench limits. Select a proper size

socket wrench and attach it to the torque wrench square drive. Place the

socket wrench on the work and pull the torque wrench handle in the desired

direction to tighten the work. The tightening torque will be indicated on

the dial or scale, depending on the type of torque wrench used.

(9) Spanner Wrenches. When using a pin-face spanner wrench (figure

29 on the following page), insert the pins or lugs into the pin holes of the

part. Keep the pin face of the wrench flush with the part surface and turn

the wrench. Exert enough force against the wrench so that the pins do not

jump out of the holes. Hose coupling spanner wrenches are shaped so that

they fit around the coupling with the pin or lug at right angles to the

handle.

Insert the pin in the hose coupling pin hole.

Pull or push the

handle in the direction opposite the hook of the spanner wrench.

Make

certain the pin fits the hole and that the force is