18 | MSD Legend Series Operation & Maintenance Manual
• When processing oversized material, make partial bites to start the breakage and then back o before making the
next partial bite. This will allow the broken material to fall away between bites.
• When processing any rigid member, use the rotator to square the jaws to the cut. If the jaws are not square, the
rotator will back-drive to adjust to the cut.
• When shearing large steel members, such as I-beams or tubing, try doing it in two cuts rather than one. Pierce the
material about halfway through with the rst cut, and then nish it o with the second cut.
• The shear jaws are best capable of processing light, thinner gauge materials immediately after performing
blade maintenance. When processing larger materials, the condition of the blades are not as critical. See “Blade
Maintenance” on page 26.
• Sort your scrap to get the highest capacity from the attachment.
• Start processing smaller materials and work up to larger materials. This will help you learn the limitations of the
machine and will allow the machine to warm up properly.
• Understand that the attachment does have limits. Sometimes it may be necessary to downsize very large material
by another method before the attachment can process it eectively.
• Cut material deliberately. Do not plunge the jaws into a pile of material and cut indiscriminately.
• Keep the attachment properly maintained. Jaws with excessive blade gaps or dull teeth are much less eective.
Lack of maintenance can lead to greater problems and potential downtime.
• Only use the force of the cylinder to cut material. Do not attempt to apply other forces on the shear to aid in material
processing.
• The rotation function is for positioning only. Do not use it for bending, breaking or prying.
BLEED THE SHEAR HYDRAULIC CIRCUIT
Air must be bled out of the hydraulic circuit prior to operation. Air in the system leads to cavitation, oxidation of the
oil and excessive heat. These conditions promote hydraulic oil break-down, contamination, noise, sluggish operation,
reduced component life and potential cylinder damage.
1. Start with the shear in the vertical position.
2. Set the excavator at idle speed.
3. Slowly open the jaws until a noticeable change in tone of the excavator is heard, indicating a full cylinder. Release
the controls and do not continue to apply full operating pressure to the cylinder.
4. Slowly close the jaws until the cylinder rod is extended approximately 1/4 stroke.
5. Open the jaws to retract the cylinder all the way.
6. Repeat steps 3 and 4. Extend the cylinder a quarter stroke more each time, until you reach full stroke.
7. Slowly cycle back and forth, at least ve times, to full stroke. Be careful not to apply full operating pressure to the
cylinder at this time.
8. Check the base machine hydraulic uid level and ll if necessary.
9. Slowly extend and retract the excavator cylinder to it’s limits. Check for interference between the attachment and
the excavator boom or stick. Check the hydraulic lines that connect to the attachment. Ensure they are not rubbing
or becoming damaged in any way. Contact your dealer immediately if interference occurs.
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