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SHINDAIWA OWNER’S AND
OPERATOR’S MANUAL
EC7500/EC7600
ENGINE CUTOFF SAW
WARNING!
Read this manual and familiarize yourself with its contents.
This unit is designed primarily for cutting construction materials and metal ac-
cording to the type of cutting wheel installed.
To minimize the risk of injury to yourself and others, always wear hearing pro-
tection, a dustproof mask, goggles and a helmet when operating this unit.
Keep this manual handy so you can refer to it when required.
Pa
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Contents Labels and Symbols Page The following are symbols and their Attention Statements ............................ 2 meaning that appear on the unit. Labels and Symbols .............................. 2 Safety Precautions ................................. 3 Read and follow this operator's Safety/Operation Information Labels . 7 manual. Failure to do so could result in serious injury. Unit Description .................................... 8 Technical Specifications ....................... 9 A
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Safety Precautions WARNING! Before Operation Children and people who do not To minimize the risk of sparks understand this manual must not igniting clothing while operating the use this unit. unit, wear clothing made of leather, wool, tightly-woven cotton, or cotton Never allow other people or treated with flame-retardant. animals to be near the unit when starting or operating. Never use any cut-off wheel that is not recommended in this manual. Never touch a rotating cut-o
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Safety Precautions (continued) WARNING! Before Operation (continued) Do not use the cut-off saw to cut or disturb asbestos or products Before cutting into a mate- containing or wrapped in asbestos. rial, familiarize yourself with If you believe you might be cutting the risks associated with dust, asbestos, contact your supervisor. fumes, or mists that may be generated during opera- tion. Make sure you provide adequate protection against harmful emissions. A high- performance res
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Safety Precautions (continued) WARNING! Kickback Kickback may force the cut-off wheel up and back toward the operator lightning-fast. Kickback can occur whenever the upper half of the cut-off wheel touches an object. Never EC7500.14 cut an object using the upper half of the cut-off wheel. Figure 2. Always be aware of, and pre- pared for, kickback. Operation The unit must be held firmly with Never impact or apply pressure to both hands, one hand on the the sides of the cut
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Safety Precautions (continued) WARNING! Operation (continued) Inspection and Maintenance If you discover fuel leakage, im- Before performing any inspection, mediately stop the engine. maintenance, repair or cleaning of the unit, make sure engine Cutting may cause sparks from and cut-off wheel are completely the cut-off wheel. Make sure stopped and cooled down. there is no flammable substanc- es nearby. Inspection and maintenance operations should be done in a Never cut
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USE ONLY GENUINE � SHINDAIWA BLADES No performance guarantee without � using genuine Shindaiwa blades� No-load revolution speed: 4180 min-1 (rpm)� Use reinforced abrasive blades with � maximum useable perimeter velocity of: � 15,749 ft/min.(4800 m/min.) Max. blade diameter: 12" (305mm)� Max. blade thickness: 0.157" (4.0mm)� EC7500 Standard arbor: 0.86" (22mm),� others available; see owner’s manual Safety and Operation Information Labels IMPORTANT! Make sure all safety and operation informatio
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Unit Description Air Cleaner Muffler Cover Carburetor Idle Adjustment Screw Choke Belt Guard EC7500.18 Wheel Guard Lock Knob Decompression Valve Primer Pump Clutch Rear Cover Handle Front Recoil Handle Starter Throttle Trigger Lockout Cut-off EC7500.1A Wheel Cylinder Cover Throttle Fuel Filler Trigger ON/OFF Cap Switch Figure 5 8
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Technical Specifications Engine Type ............................ 2-Cycle, Power Transmission ........... Automatic vertical-cylinder, air-cooled centrifugal clutch, V-ribbed belt 3 Displacement ........................ 73.5 cm * Anti-Vibration System .............. Unified handles with 7-point support Bore x Stroke ......................51 x 36mm Safety Devices ...........Throttle lock-out, Max. Power Output** ................. 3.3kW wheel guard Recommended Engine Idling Dry Weight (wit
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Assembly IMPORTANT! Prior to Assembly This unit is Before assembling, make sure you Drive Collar equipped with Shaft have all the components required for a a 22mm wheel complete unit. This unit consists of the collar. Wheel items shown in Figure 6. adapters for Carefully inspect the engine unit for 20mm and damaged or loosen bolts. If you find 25.4mm cut-off any damage or missing items, check wheels are with your dealer. located in the Flange Snap EC7500.45 tool set. Before Ring
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4. Loosen bolt with the wrench and remove bolt and outer flange. See Figure 8. WARNING! Outer Using an inappropriate cut-off Flange Bolt wheel may cause the wheel to break and may result in serious injury. Tighten 6. Replace outer flange and bolt, and then, while holding hex wrench in the hole in belt guard, tighten the EC7500.20 Loosen bolt with wrench. Figure 8 7. Make sure the cut-off wheel is securely fastened. Spin the wheel to 5. Place cut-off wheel so the inner make sure
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Starting the Engine When the Engine is Cold WARNING! Before starting the engine, place the unit on a clean, level surface. Make sure you have good secure footing and always keep a firm grip on the unit. EC7500.22 Move at least 3 meters away Figure 10. from the fueling site before 7. Grip the recoil starter handle with starting the engine. your right hand, pull the starter Make sure the cut-off wheel is cord slowly until you feel the starter well clear of obstacles. The cut- enga
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Starting a Warm Engine 1. Turn the on-off switch On. WARNING! The cut-off wheel must not rotate at idle speed. If it rotates, reduce idle speed by adjusting the idle EC7500.24 adjust screw. Figure 12 4. Remove the plug cap and discon- 2. Push the decompression valve in. nect the spark plug by using the 3. Pull the choke all the way out and plug wrench. See Figure 13. Check push it back to the original position to see if the spark plug electrode is (choke open). The throttle is auto- fuel
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Operation Adjusting Wheel Guard Angle Adjust the position of the wheel guard WARNING! so that fragments will not fly toward Never permit bystanders or you if the wheel fractures. To reposi- animals near the unit when tion the wheel guard, loosen the lock starting or operating the unit. knob (counterclockwise). When the wheel guard is positioned correctly, Be aware of kickback! securely tighten the lock knob. Kickback may force the cut-off See Figure 14. wheel up and back toward t
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Reversing cutting head for flush cutting operations WARNING! Before performing any work on the cut-off saw, make sure the engine is stopped and the ignition switch is OFF. Remove Cutting Wheel Belt Guard Loosen Two Bolts EC7500.34 EC7500.35 6mm Socket- Head Bolts Figure 17 Tension Screw Tension 3. Using a 6mm hex wrench, remove Indicator the two belt guard bolts and slide Figure 15 EC7500.34A the belt guard forward to remove. NOTE: See Figure 17. For units equipped with a water kit
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Reversing cutting head for flush cutting operations(cont.) 6mm Socket- Figure 20 Head Bolts Figure 19 6. Adjust the tension screw until the 5. Making sure that the drive belt is tension indicator is in the middle of fully engaged in the drive pulleys, the scale. See Figure 20. slide the belt cover on and install 7. Tighten the two mounting bolts the two socket-head bolts into the securely. left-hand side of the mounting sur- 8. Reconnect the main water line, face only until the bolts b
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Reversing cutting head for flush cutting operations(cont.) Cleaning the Air Cleaner Unscrew the Knob WARNING! Pre-filter Inspection and maintenance should be done in a well ventilated EC7500.23 Choke place and where there is no risk of fire. Dust in the air cleaner will affect en- gine life. The air filter must be cleaned EC7500.48 Remove every time you start operating. Filter the Filter Clean the air filter once a day and and Pre- EC7500.24 filter replace the filter every 20 hours of operation
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Adjusting the Carburetor Adjusting Idle Speed It is not necessary to adjust the carbu- To adjust idle speed, turn the Idle retor when the unit is new. Adjust the Adjust Screw with a screwdriver. See carburetor only when you are sure it is Figure 22. Turn clockwise to increase necessary due to differences in work- idle speed. Adjust idle speed so the cut- ing conditions such as atmospheric off wheel does not rotate at idle. pressure or temperature, or change Recommended idle speed: in unit
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High and Low Speed Needle Cleaning Cylinder Fins The high and low speed needle is fixed and cannot be adjusted. WARNING! Spark Plug Maintenance Before cleaning cylinder fins, make If the engine becomes hard to start or sure the engine is cold. if idle speed is unstable, inspect the spark plug according to the following Dust and debris may accumulate procedures. between the cylinder fins and can lead to engine overheating. In order to 1. Remove the spark plug. Refer to maintain efficient ser
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Replacing the Drive Belt Checking the Cut-off Wheel 1. Loosen the tension screw. Loosen the two bolts on the belt guard and WARNING! remove the belt guard by sliding it to the right. See Figure 26. Never use a wheel which has breakage, cracks or distortion. 2. Loosen the two bolts in the clutch The wheel may break while operat- cover and remove the clutch cover. ing and may result in serious injury. 3. Replace the old belt with a new one. Always check the condition of the cut- off whee
