Enerpac NS Serie Instrucciones página 6

WARNING: To prevent personal
injury, do not place hands or
fi ngers in the cutting area.
WARNING: Do not move or reposition
nut splitter during operation.
10. Operate the pump to slowly advance the nut splitter blade
until it makes contact with the nut. Check that the blade is
resting squarely on the nut fl at.
Notes:
• Air or electric powered pumps only: Once the
blade has stopped cutting at 1000 psi [69 bar], the
pressure should be gradually increased using the
pressure regulator on the pump. Allow adequate
time for the blade to cut before increasing pressure.
• If pressure is increased too quickly, blade damage
may result. Excessive pressure may also cause the
nut splitter's internal relief valve to open, resulting
in oil leakage from the oil bleed hole located on the
underside of the blade holder.
• On larger nuts, it may be helpful to periodically
retract and re-lubricate the blade. This will reduce
friction and increase blade effi ciency.
11. Continue to apply hydraulic pressure until the nut is
completely severed. As the nut splits, a loud "crack" will be
heard, indicating that the nut has been severed.
12. If necessary, a second cut may
be applied, at 180° to the fi rst,
completely severing the nut in
half. See Figure 10.
IMPORTANT: Do not cut the nut
into small pieces. Use a maximum
of two cuts and always at 180º
(opposite) to the fi rst. Otherwise,
nut metal fragments may
released.
13. After the cut is completed:
• Single acting models: Release the pressure to retract the
nut splitter blade.
• Double acting models: Move the control valve to the
retract position to retract the nut splitter blade.
14. Stop the pump. Check that pressure gauge indicates zero
(0) psi/bar.
15. Remove nut splitter from the nut.
16. Remove the severed nut from the stud.
6.4 If Nut Does Not Split at Full Hydraulic Pressure
If the nut splitter is at full pressure, 10,000 psi [700 bar], and the
nut does not split:
WARNING: Fully release hydraulic pressure and
disconnect hydraulic hose(s) from nut splitter cylinder
before applying lubricant to blade or performing any
other work inside the cutting zone.
1. Ensure that the blade cutting depth setting is correct. Also,
check that the cylinder is not at full stroke.
be
Fig. 10, Making Two Cuts
2. If the blade cutting depth setting is correct and cylinder
is not at full stroke: Release hydraulic pressure and rotate
the cutting head clockwise one full turn. This will allow the
blade to advance 1 to 2 mm further. Then, re-apply hydraulic
pressure and try again to split the nut.
3. If step 2 did not work: Release hydraulic pressure. Re-
lubricate the blade and the groove in the nut where the blade
has penetrated. Then, re-apply pressure, ensuring that the
blade is positioned back in the same nut groove.
4. If step 3 did not work: Re-lubricate the blade and the
nut groove again. Lift and position the nut splitter above
the fl ange surface so that the blade will penetrate the nut
approximately ² ⁄ ³ the height of the nut, and in the same
groove. Then, re-apply pressure.
5. If step 4 did not work: Install a larger cutting head (if
available) or use a larger nut splitter model. Be certain that
the nut size is within the larger equipment's operating range.
6.5 After Using the Nut Splitter
1. Ensure that the nut splitter cylinder is fully retracted. If it is
fully or partially advanced, reconnect the cylinder to the pump
and allow time for full retraction to occur. After ensuring that
there is no pressure present in the system, disconnect the
hydraulic hose(s) from the cylinder.
2. Using a clean cloth, wipe away any debris from the nut
splitter components. Pay particular attention to the cutting
head and blade area. Remove all traces of lubricant from the
blade.
3. Reinstall dust caps and/or plugs on all hydraulic couplers.
4. If nut splitter is to be stored in damp conditions or will not be
used for a long period of time, coat exterior surfaces with a
water-repellent spray or similar removable protective coating.
5. Store the nut splitter subassemblies in their storage cases.
7.0 CUTTING BLADE REPLACEMENT
The blade features three separate cutting edges. If one edge
becomes damaged or severely chipped, the blade can be
removed, rotated 120 degrees, and reinstalled to provide a new
cutting edge.
IMPORTANT: After all three edges are worn, the blade should be
replaced. Do not attempt to sharpen worn or damaged blades.
Replace the blade as described in the following steps. See Figure 11.
① Ball Detent
② Blade (removed)
Figure 11, Cutting Blade Replacement
1. Be sure that nut splitter cylinder is fully retracted and that
pressure gauge indicates zero (0) psi/bar. Disconnect
hydraulic hose(s) from cylinder coupler(s).
2. Slide the blade from the holder and out through the underside
of the head. If the blade is tight, a light tap on the top surface
of the blade should free it from the ball detent mechanism.
6
③ Blade (installed)