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Hold your AmPro wrench in one hand. With the other hand, grab the locking knob at the end of the torque wrench and turn it counterclockwise to unlock the torque setting.

Adjust the handle to your desired torque setting. Start by rotating the handle so the setting reads "0" on the minor graduation scale. The "0" is also in line with vertical scale on the shaft. Both of these scales are in inch pounds (in/lb).

Raise or lower the handle to adjust the vertical scale setting. The vertical scale has large numbers (120, 360, 600, etc.) listed in a vertical fashion on the handle.

Rotate the handle to your desired setting on the minor graduation scale. This adjustment allows you to add small amounts of torque to your vertical scale setting. "1" on the minor graduation indicates 1 foot/lb and is equal to 12 inch/lb. For example, if you raise the handle on the vertical scale to 360 inch/lb and then rotate the minor scale to "2", you will be adding 24 inches to your 360 setting to make it a setting of 384 inch/lb.

Rotate the locking knob clockwise to secure your setting into place.

Connect a male 10,000-psi hydraulic pump hose from the female connection on the torque wrench to the female connection on the 10,000-psi pump.

Connect a female 10,000-psi hydraulic pump hose from the male connection on the torque wrench to the male connection on the 10,000-psi pump.

Twist the metal connectors on both ends of each hose clockwise until secure.

Connect the pump to an available power outlet if it is an electric pump or to an air-pressure source if it is an air-driven pump.

Locate the desired torque value on your torque conversion chart. Scroll over to determine the corresponding hydraulic pressure value that you must set on the pump.

Loosen the locking ring on the adjustable relief valve on the pump. Turn the thumbscrew clockwise to increase the amount of pressure the pump can contain or counterclockwise to decrease the amount of pressure the pump can contain.

Press and hold the "Advance" button on the pump remote control to fill the pump until the pump gauge reaches the desired pressure.

Tighten the locking ring on the adjustable relief valve once pressure is set to the desired level.

Connect the desired impact socket to the torque wrench head and insert the locking pinion into the socket.

Apply the torque wrench head to any bolt you wish to tighten, ensuring that the reaction arm (long portion of the torque wrench head) presses against an adjacent surface.

Wear safety glasses, because metal fasteners sometimes break. Attach a socket to the torque wrench.

Disregard torque readings less than 20 percent of the full scale. Do not estimate torque readings greater than 100 percent of the full scale.

Inspect and distrust any torque wrench you drop or that you suspect may have been dropped by someone else.

Store click-type torque wrenches with the gauge set to the lowest setting. Always store them in protective cases.

Apply a specific torque value to a fastener with a torque wrench only during final tightening. Never use a torque wrench as the primary means of tightening or loosening fasteners. Use a socket wrench instead.

Grasp a torque wrench in the center of the handle, because torque wrenches are length specific. If you must use two hands, put one hand on top of the other.

Torque a fastener with a slow, steady movement. Never jerk a torque wrench.

Recalibrate a torque wrench after every 5,000 uses.