MDP Operation & Maintenance Manual | 13
BLEED THE HYDRAULIC CYLINDER
Air must be bled out of the cylinder 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 MDP 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. Retract the cylinder rod all the way.
6. Repeat steps 3 and 4. Extend the rod a quarter inch 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.
OPERATING TIPS
• 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.
• When handling materials, keep the load as close to the base machine as safely possible. This will provide the
greatest machine stability.
• Avoid handling long, heavy materials o center.
• When processing oversized concrete, 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.
• Sort your scrap to get the highest capacity from the attachment.
• 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.
• 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.
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