Testing the Assembly

Rotate the square drive and make sure that the drive pawl and reaction pawls move as expected.

Make sure that the reaction arm mechanism works as expected. See the section Setting the Reaction Arm.

Connect the wrench to a pump and hose.

Advance and retract the wrench; make sure that the square drive indexes forward with each cycle.

As a final test, calibrate the wrench to make sure that the torque output is as expected.