Blount 853PRO manual Operation, Cutting Tips

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853PRO OPERATOR’S MANUAL

OPERATION

 

 

CUTTING TIPS

•To start a cut, hold trigger on full throttle and slowly plunge the nose of the guide bar straight into the wall. Use the fixed WallWalker® as a pivot point and pull up on the rear handle to rotate the guide bar into the cut.

•Always operate the saw at full throttle. Apply enough feed force so that the free running RPM drops 20 to 30%. If too much force is applied, the saw will lug or stall. The diamond chain will not have enough speed to cut effectively. If too little feed force is applied, the diamonds will skid and glaze over.

•For straighter cuts use the “Step Cut” method. First score the entire cut line with the nose of the guide bar approximately 1/2 inch (12 mm) to 1 inch (25 mm) deep. Next, deepen the cut by about 2 inches (50 mm). This groove will help guide the guide bar for a straight cut. Then plunge all the way through and complete the cut using the WallWalker®.

•Use the WallWalker® to help cut more efficiently and reduce operator fatigue. The WallWalker® is a fulcrum that converts inward force to downward force and will develop a 4-to-1 mechanical advantage. To use correctly, plunge into the wall and simply engage the point of the WallWalker® into the cut and push straight in. The WallWalker® will force the saw to feed down.

•Apply upward force on the trigger handle to keep the WallWalker® engaged properly, otherwise the WallWalker® pick will skid, which will reduce the effectiveness. As the saw begins to rotate up, feed force is developed down the line of the intended cut. Once the saw is fully rotated upwards, pull the saw out of the cut a few inches and re-engage the WallWalker® to the wall and repeat.

•When cutting rebar, slowly rock the saw so that you’re always cutting concrete as well as steel. This will help keep the diamonds exposed. Also, expect less diamond chain life when cutting rebar.

•Expect more diamond chain stretch and guide bar wear when making “nose buried” cuts for extended periods of time, as the diamond chain does not have a chance to throw the slurry away from the nose of the guide bar.

•If the saw begins to cut consistently crooked, turn the guide bar over and use the other side. Dress worn rails with belt sander.

Note: The normal life of a guide bar is two to three diamond chains. Rebar can shorten guide bar life.

•When using a new diamond chain, you can increase the cutting speed by opening up the diamonds by making a few cuts in an abrasive material such as a cinder block.

© 2008 ICS, Blount International Inc. Specifications are subject to change without notice. REV0708 F/N 71904

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Contents 853PRO Hydraulic Saw Table of Contents 853PRO OPERATOR’S ManualSymbols & Labels 853PRO OPERATOR’S Manual Safety Following Symbol Applies to ALL the Items Listed on thisFollowing Symbol Applies to ALL Items Listed on this Safety 853PRO OPERATOR’S ManualGeneral Safety Precautions Technical specifications Guide BAR and Diamond Chain Installation Install the bar clamp plate over the bar studs Operation 853PRO OPERATOR’S Manual PRE-CUT ChecklistPlanning the CUT Operation Cutting TipsMaintenance 853PRO OPERATOR’S Manual System CLEAN-UPDrive Sprocket Installation 853PRO OPERATOR’S Manual Drive Sprocket RemovalTroubleshooting 853PRO OPERATOR’S Manual TroubleshootingApproximate Cutting Rates ReferenceINCH-FOOT Definition Reference 853PRO OPERATOR’S Manual Performance Loss VS. Hydraulic Hose Length AssumptionsPage 853PRO Operators Manual
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