Operating Instruction Manual:
OM-TWS-N-01
Serial Numbers:
All
12
5.5 Reaction Surfaces
The function of the reaction arm / surface is to hold the tool in position against the forces generated to tighten
or loosen bolts or nuts. Hydraulic wrenches generate tremendous torque (rotational) forces.
5.5.1 Setting the Reaction Arm
Make sure the reaction arm is positioned correctly. (
See Figure 5.7
)
The reaction arm can be positioned in numerous positions within a 360° circle. However, for the arm to be
correctly positioned, it
MUST
be set within a 90° quadrant of that circle. That quadrant is the area located
between the protruding square drive and the bottom of the housing away from the swivel inlets. It will always
be toward the lower half of the housing and on one side of the housing when tightening and the other side
when loosening.
Figure 5.7: Correct Reaction Arm Quadrants
Figure 5.6: Reaction Surfaces
