12
• Contact Enerpac for additional guidance
if a suitable reaction point is not
available.
4.2 Setting the Torque
Adjust the pressure on the pump as
necessary to set the torque. Refer to pump
manufacturer's instruction manual.
4.3 Wrench Operation
WARNING
Failure to observe the following
precautions could result in serious
personal injury:
• Stop operation immediately if a gap
appears between the drive unit locating
plate and the drive unit. A gap in this
location indicates that the drive unit
retaining pin is worn or damaged, and
must be repaired. Use of wrench with
worn or damaged retaining pin may
result in the drive unit forcefully ejecting
from the cassette.
• Never strike the tool with a hammer
or other object while it is under load.
Catastrophic failure of the wrench
could occur, and dislodged parts
could become dangerous projectiles.
Uncontrolled release of hydraulic oil
could also occur. Refer to Section 2 of
this manual for additional information.
4.3.1 Tightening a Nut or Bolt
(Fig. 7 and 8)
• Position the tool on the nut or bolt with
the clockwise (+) side facing upwards.
• Position the reaction foot (17) against a
suitable reaction point (18). The reaction
point will counteract the force caused by
operating the tool.
• Start the pump.
• Operate the pump until the nut or bolt
has been tightened to the required
torque.
Connect hoses to wrench as described in
the following steps:
• Be sure that all pressure in system
is relieved and that pressure gauge
indicates zero (0) psi/bar.
• Remove the hose dust caps.
• Connect the hose with the female
coupling (15) to the wrench advance
coupling (4).
• Connect the hose with the male coupling
(16) to the wrench return coupling (5).
•
At each connection, pull the collar on the
female coupling over the male coupling.
Engage threads and hand tighten the collar.
• Connect the hoses to the pump.
Refer to the pump instruction manual.
4 Operation
4.1 Prior to Operation
• Be sure the nut or bolt to be fastened is
clean and free of loose dust or dirt.
• Be sure the nut threads properly engage
with the threads of the bolt, and that
cross-threading has not occurred.
• Be sure that the threads and the bearing
surface are liberally coated with the
correct bolt lubricant or anti-seize
compound.
• Make all torque calculations based
on the bolt lubricant's (or anti-seize
compound's) stated coefficient of
friction. Failure to do so may result in the
required bolt load not being achieved.
• Be sure that the backup wrench (used to
keep the nut or bolt on the opposite end in
place) is correctly positioned and secured.
WARNING
Be certain that backup
wrench is of the correct size and that
there is an adequate abutment surface.
Personal injury could occur if backup
wrench loosens or dislodges during
bolting procedures.
ENGLISH
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