Stanley Black & Decker MB656 Positioning the Breaker Tool on the Work Material, Backhoes

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Figure 3. Skidsteer Loader

BACKHOES

With the breaker tool in place on the material to be worked, position the backhoe so the boom is halfway up (45°) and the dipper holds the breaker almost vertical. Lower the loader bucket until the weight is off the front tires.

OPERATION

Apply down force.

Figure 5. Excavator

POSITIONING THE BREAKER TOOL ON THE WORK MATERIAL

Position the tool bit near the edge of the work material, not in the center or far from the edge. Position the tool 6–18 inches (depending on the material) from the edge. Breaking off smaller pieces of rock or concrete usually accomplishes more than trying to break larger pieces.

Apply down pressure.

Figure 4. Backhoe

Apply down force to the boom/dipper until the rear of the backhoe is raised off the ground. Rear tires and stabiliz- ers should be off the ground so the total rear weight of the backhoe is on the breaker tool. The breaker is more efficient when adequate down force is applied.

EXCAVATORS

With the breaker tool in place on the material to be worked, position the excavator so the dipper is at ap- proximately 45° and the breaker is almost vertical. The tracks of the excavator should be in line with the boom and the breaker.

Break near the edge.

Figure 6. Position the Tool Bit

On flat material or rock, the breaker should be vertical or “curled” back slightly to direct the impact force down- ward and toward the backhoe. This directs the force back toward the edge of the work material. If the tool is positioned in the center of the work, or too far from the edge, the energy will be absorbed into the material without cracking it. Do not run the breaker longer than 15–20 seconds. If breakout does not occur within this time, move the breaker to another position.

MB656 User Manual ◄ 11

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Contents MB656 Weisbeck, Andy Declaration of ConformityTable of Contents Local Safety Regulations Safety SymbolsSafety Precautions Know the Work Conditions Obey Safety RulesBe Thoroughly Trained Before Operating the Unit Alone Parking Brake Tool Stickers & Tags 66219 Guaranteed Sound Power Level StickerOperation PRE-INSTALLATION InstructionsPRE-OPERATION Procedures Positioning the Carrier Operating a BreakerLong Term Storage Preparation for USEBackhoes Positioning the Breaker Tool on the Work MaterialBreaking Maintain Down PressureBlank Firing Grease the BIT Underwater UsageProblem Cause Solution TroubleshootingTool Stop and Lower Bushing MaintenanceDaily Maintenance Checks Normal Charging the AccumulatorHose Routings Flow Control KIT InstructionsRetainer PIN Item Wear TolerancesLower Bushing Item Tool Stop ItemBlank Firing or Free Running Tool Failure not Covered Under WarrantyWORN-OUT Front Bushings or Retainer Pins Proper USE & Care of Tool BitsCorrosion PryingInternal Material Flaw Tool Failure Covered Under WarrantyBlunt MoilChisel Test Procedure Flow Test ProceduresHeat Load Test TroubleshootingTool DefinitionsDimensions and Weights SpecificationsMiscellaneous AccessoriesMB656 Power Cell Illustration Housing Parts Illustration Charge Valve Assy Incl MB656 Parts ListMB656 Mounting Brackets Page Stanley Hydraulic Tools SE Naef Road Milwaukie, Oregon
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