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Instructions Blount, Modèle 853PRO

Fabricant : Blount
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free running) 4,800 sfm (avg. free running chain) 5,300 rpm (avg. free running) 4,500 sfm (avg. free running chain) Noise Level 88 dB @ 3 ft (1 m) 88 dB @ 3 ft (1 m) Vibration 4 m/sec. (front handle) Ref. ISO standard no. 7505 4 m/sec. (front handle) Ref. ISO standard no. 7505 Torque 130 in-lbs (176 Nm) 207 in-lbs (280 Nm) Horsepower 11.5 hp (8.6 kW) 17.5 hp (13 kW) Set-UP GUIDE BAR AND DIAMOND CHAIN INSTALLATION STEP 1 Loosen the side cover nuts and remove the side cover. STEP 4 Mount the chain on the bar starting at the drive sprocket & continue over the bar nose. Install the chain correctly. The bumper must always lead the segment into the cut as shown here. STEP 2 Place the bar onto the studs and the chain adjustment pin. STEP 5 Make sure all of the drive links are inside the bar groove, then pre- tension the chain. STEP 3 Turn the chain-tensioning screw CCW until the bar comes into contact with the drive sprocket. Set-UP GUIDE BAR AND DIAMOND CHAIN INSTALLATION STEP 6 Install the bar clamp plate over the bar studs. STEP 8 Tension the chain. Do not over tension the diamond chain. Loss of power will result. It is normal for the drivelinks to hang underneath the guide bar. The diamond chain should be snug but be able to be pulled around the guide bar by hand. STEP 7 Install the side cover over the bar studs and install side cover nuts. Finger tighten only. STEP 9 Lift up on the nose of the bar and firmly tighten the side cover nuts. To prevent chain tensioner breakage, be sure the side cover nuts are tightened to approximately 20 ft-lbs (27 Nm). OPERATION PRE-CUT CHECKLIST • Proper Diamond Chain Tension: The diamond chain should be tight but easily pulled around the guide bar by hand. • Ensure all safety devices are properly mounted and functional and that all controls are in proper working order. • Be sure there are no obstructions (plumbing, electrical conduit, air ducts). • Always wear protective clothing, including hard hat, eye protection, hearing protection, non-slip safety boots, gloves, and avoid wearing loose fitting clothing. • Adequate Water Supply and Pressure 1 gpm (4 lpm) recommended flow Minimum water pressure 20 psi (1.5 bar) Note: The single most important factor an operator can control to increase chain life is to use adequate water pressure. Insufficient water supply will result in excessive wear to the chain, which can lead to loss of strength and chain breakage. • Proper Hydraulic Supply to the saw Maximum Flow 8 gpm (30 lpm) or 12 gpm (45 lpm), depending on saw model Maximum Hydraulic Pressure 2,500 psi (172.5 bar) PLANNING THE CUT • Outline the cut with a permanent marker for a visual cutting guide. • Avoid pinching the guide bar and diamond chain. Always cut the bottom of an opening first, then top, and then the sides. Save the easiest cut for last. • For the straightest cuts use the “Step Cut” method. First score the entire cut line approximately a 1/2 inch (12 mm) deep using the nose of the guide bar. Next, deepen the cut by about 2 inches (50 mm). Then plunge all the way through and complete the cut using the WallWalker®. • Be sure cut concrete cannot fall and injure operator or bystanders. Concrete is very heavy, one cubic foot = 12 in x 12 in x 12 in = 150 lbs (30 cm x 30 cm x 30 cm = 68 kg). • Check for live electrical wiring near the cutting area or in the concrete to avoid electrocution. 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 in...