Q1: What is the difference between a Fixed and a 360° Rotating Hydraulic Pulverizer?
Fixed Hydraulic Pulverizers: These are engineered without a hydraulic rotation motor, making them simpler, lighter, and exceptionally rugged. They are highly cost-effective and optimized for secondary floor crushing (pulverizing salvaged concrete blocks on the ground and separating rebar).
Rotating Hydraulic Pulverizers: Equipped with a heavy-duty hydraulic slewing bearing, these tools support continuous 360° rotation. They are ideal for primary structural demolition (high-reach building dismantling, columns, and beams), offering operators maximum angling flexibility.
Q2: How do I choose the right pulverizer model for my excavator?
Choosing the right attachment depends entirely on your excavator's operating weight and hydraulic capacities (pressure and flow rate). SLYM specializes in manufacturing attachments for mainstream 20-30 Ton excavators.
⚠️ Tech Note from SLYM Technicians: Never install a smaller-class pulverizer on a larger excavator. A 30-ton carrier will easily overload the structural limits of a 20-ton attachment, leading to premature frame cracking or cylinder damage. Always consult our [Excavator Attachment Compatibility Chart] or contact our engineering team before purchasing.
Q3: Why has the closing force (crushing power) of my hydraulic pulverizer suddenly dropped?
If your equipment experiencing a sudden loss of cutting or crushing power, check the following three areas:
Excavator Relief Valve Pressure: Ensure the carrier's main control valve is outputting the correct operational pressure designated in SLYM's manual.
Internal Cylinder Leaks: Over time and under high thermal stress, high-pressure cylinder seal kits can wear down, causing hydraulic oil to bypass the piston.
Speed Valve Blockage: If your model features an integrated rapid-cycle speed valve, particles in contaminated hydraulic oil may cause the internal valve spool to stick, preventing it from switching to maximum pressure mode.
Q4: Why are the pulverizer jaw plates and teeth wearing out faster than expected?
Accelerated wear is typically caused by operating on materials that exceed the tool’s design limits—such as high-hardness granite bases or heavy structural solid steel. Additionally, running the attachment with blunt, worn-out teeth causes unequal stress distribution, accelerating wear on the entire jaw plate.
Maintenance Tip: SLYM utilizes premium, high-tensile wear-resistant steel (Hardox equivalent) for all critical wear parts. However, we highly recommend inspecting the crushing tips every shift. Re-welding and hardfacing blunt teeth with low-hydrogen wear-resistant rods in time will significantly extend the service life of your jaws.
Q5: Can structural cracks on the pulverizer frame be welded and repaired on-site?
Yes, structural repairs can be done on-site, but strict welding protocols must be followed due to the high-strength alloy materials used in heavy-duty attachments:
Preheating: You must preheat the cracked area using a torch to 150°C-200°C before welding.
Preparation: Gouge or grind out a deep V-groove along the crack line.
Welding Rods: Use low-hydrogen, high-tensile welding electrodes (such as E8018 or equivalent). Apply multi-layer continuous welding and allow the steel to cool slowly under insulation blankets to prevent secondary cracking.
Q6: How often should I grease the main components of the excavator attachment?
Under continuous, high-load demolition work, the main pivot pin, bushings, and cylinder eyelets endure severe mechanical load. SLYM technical personnel recommend applying high-pressure molybdenum disulfide grease every 4 to 8 hours of continuous operation (or once per shift). If working in extreme mud, water, or heavy dust, shorten the greasing interval.
Q7: Which critical spare parts should I stock to eliminate project downtime?
With over ten years of industry experience, SLYM recommends that global fleet managers and equipment dealers keep a "Critical Downtime Kit" on-site. This includes:
Premium Cylinder Seal Kits (for urgent hydraulic leak repairs)
Replaceable Crushing Teeth / Tips
Scrap Cutting Blades & High-Strength Bolts
Main Pivot Pins and Bronze Bushings
