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RSL Torque Wrench
4.5 Square Drive Torque Wrench Set Reaction
4.5.1 Determine if fastener has right hand or left
hand thread.
4.5.2 Determine if fastener will be loosened or
tightened.
a.
Plan to place square drive (sq. dr.)
cassette on nut for loosening (See Figs.
4.5-1 and 4.5-2).
b. Plan to place sq. dr. cassette on nut for
tightening (See Figs. 4.5-1 and 4.5-2).
4.5.3 Fig. 4.5-1 and 4.5-2 show proper sq. dr.
torque wrench set reaction. Arrow by hose
points to gap required for proper reaction.
4.5.4 Fig. 4.5-3 shows improper sq. dr. torque
wrench set reaction
a.
Improper reaction and/or incorrect
socket size make tool, socket, or nut
vulnerable to fracture.
b. Sq. dr. tool must use reaction arm.
c. Contact Enerpac engineering for special
applications.
d. Reaction arm should be at 90 degrees
and extend in same direction as sq. dr.
e. Lifting (cocking) is when a socket fits
over a bolt at an angle:
i. Common cause of socket breakage
ii. May occur when reaction arm:
1. Has small engagement and operator
lifts reaction arm over flange. This
creates “out of square” engagement.
2. Reacts against sloped surface.
4.5.5 Check reaction with a floor test (See
Fig. 4.5-2).
a.
Set complete tool assembly (with
socket) on floor.
b.
Push down on sq. dr. retainer (down
arrow) and hold.
c.
Check clearance under reaction arm
(left pointing arrow).
i. If gap, proper reaction
ii. If no gap, improper reaction
d. May perform test on actual applications.
Angle in fig. 4.5-1 (right) must be
90 degrees.
If tool rises when load is applied, do
not operate tool. Injury and/or tool damage may
result.
RSL Reaction Arms CANNOT be
welded under any circumstances.
4.5.6 Contact Enerpac Customer Service for
special reaction arms for non-standard
applications.
•
Follow these instructions so maximum
allowable torque is not reduced.
• If you do not follow the 1.4 units back to 1 unit
down rule, contact Enerpac Service Center for
tool’s reduced torque rating.
• If you have any concerns, please contact Enerpac
engineering department.