Wren H Series, Operation Manual

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5
OPERATION
The wrench and power pump are connected by a 700 BAR operating pressure, twin-line hose
assembly. Each end of the hose will have one male and one female connector to assure proper
interconnection between pump and wrench.
CONNECTING THE TOOL
FIG3
S SERIES
DRIVE DIRECTION CHANGE
To remove the square, disengage the drive retainer assembly by depressing the center round
button and gently pulling on the square end of the square drive. The square drive will slide easily
out.
To insert the drive in the tool, place the drive in the desired direction, engage drive and bushing
splines, then twist drive and bushing until ratchet spline can be engaged. Push drive through
ratchet. Depress drive retainer button, engage retainer with drive and release button to lock.
SETTING THE REACTION ARM
All WREN's Torque wrenches are equipped with a universal reaction arm. These reaction arms
are employed to absorb and counteract forces created as the unit operates. The reaction arm
should extend in the same direction of the square drive; However, slight adjustments may be
made to suit your particular application. The function of a reaction device is to hold the tool in
position against the forces generated to tighten or loosen bolts or nuts. Hydraulic wrenches
generate tremendous force. The reaction arm can be
Squ are Drive
Drive Retai ner
Button
FIG4
FIG5
lossing tightening