G2500 / G2500 OPS 848C1B93A0 (611) G B OWNER’S MANUAL CHAIN SAWS G2500 G2500 OPS (One-Push-Start) GB-1
G2500 / G2500 OPS EXPLANATION OF SYMBOLS AND SAFETY WARNINGS Read operator's instruction book before operating this machine. Wear head, eye and ear protection. Warning! Danger of kickback. Use the chain saw with two hands. Use appropriate protections for foot-leg and hand-arm. Read, understand and follow all warnings. This saw is for trained tree service operators only. Never touch hot surface.
G2500 / G2500 OPS DECLARATION OF CONFORMITY TO MACHINES DIRECTIVE DECLARATION OF CONFORMITY TO MACHINES DIRECTIVE (Directive 98/37/EC, 89/336/EEC) and to the regulations governing transposition Internal control production (Directive 98/37/EC, 89/336/EEC) and to the regulations governing transposition Internal control production MANUFACTURER : KOMATSU ZENOAH No. 9, 1-Chome MINAMIDAI, KAWAGOE City SAITAMA, JAPAN MANUFACTURER : KOMATSU ZENOAH No.
G2500 / G2500 OPS 1. For safe operation WARNING This chainsaw has been especially designed for tree maintenance and should therefore only be used by trained operators when working on trees. 1. Never operate a chain saw when you are fatigued, ill, or upset, or under the influence of medication that may make you drowsy, or if you are under the influence of alcohol or drugs. 2. Use safety footwear, snug fitting clothing and eye, hearing and head protection devices. Use the vibration-proof glove. 3.
G2500 / G2500 OPS 18. All chain saw service, other than the items listed in the Owner’s Manual, should be performed by competent chain saw service personnel. (E.g., if improper tools are used to remove the flywheel, or if an improper tool is used to hold the flywheel in order to remove the clutch, structural damage to the flywheel could occur which could subsequently cause the flywheel to disintegrate.) 19. Always shut off the engine before setting it down. 20.
G2500 / G2500 OPS WORKING WITH TREE SERVICE CHAIN-SAWS FROM A ROPE AND HARNESS This chapter sets out working practices to reduce the risk of injury from tree service chainsaws when working at height from a rope and harness. While it may form the basis of guidance and training literature, it should not be regarded as a substitute for formal training. The saw should only be attached to the recommended attachment points on the harness. These may be at mid-point (front or rear) or at the sides.
G2500 / G2500 OPS G B Gaining a good footing at the working position can be assisted by use of a temporary foot stirrup created from an endless sling.
G2500 / G2500 OPS 2. Explanation of Symbols on the Machine WARNING For safe operation and maintenance, symbols are carved in relief on the machine. According to these indications, please be careful not to make any mistake. The port to refuel “MIX GASOLINE” Position: Fuel cap The port to top up chain oil Position: Oil cap Setting the switch to the “O” position, the engine stops immediately. Position: Front at the top of the rear handle Starting the engine.
G2500 / G2500 OPS 3. Installing Guide Bar and Saw Chain A standard saw unit package contains the items as illustrated. Power unit Bar protector Plug wrench Guide bar Saw chain Screwdriver for carburetor adjustment Open the box and install the guide bar and the saw chain on the power unit as follows: WARNING 5. Fit the chain tensioner nut into the lower hole of the guide bar, then install the chain cover, and fasten the mounting nut to finger tightness. The saw chain has very sharp edges.
G2500 / G2500 OPS 4. Fuel and Chain Oil ■ FUEL WARNING • Gasoline is very flammable. Avoid smoking or bringing any flame or sparks near fuel. Make sure to stop the engine and allow it cool before refueling the unit. Select outdoor bare ground for fueling and move at least 3 m (10 ft) away from the fueling point before starting the engine. • The Komatsu Zenoah engines are lubricated by oil specially formulated for air-cooled 2-cycle gasoline engine use.
G2500 / G2500 OPS 5. Operating the Engine NOTE WARNING It is very dangerous to run a chainsaw that mounts broken parts or lacks any parts. Before starting engine, make sure that all the parts including bar and chain are installed properly. ■ STARTING THE ENGINE Normal start 1. Fill fuel and chain oil tanks respectively, and tighten the caps securely.
G2500 / G2500 OPS 2. Put the machine body on the stable ground and make sure that there is no obstacle around the saw-crossing portion. Then, while holding the front handle with the left hand and putting the right foot on the frame portion, pull out the starter rope slowly. WARNING • Be sure to perform warming-up with the guide bar and the saw chain mounted. • Keep clear of the saw chain as it will start rotatIng upon starting of engine.
G2500 / G2500 OPS 1. H and L needles are restricted within the number of turn as shown below. H needle : -1/4 L needle : -1/4 2. Start the engine and allow it to warm up in low speed for a few minutes. 3. Turn the idle adjusting screw (T) counterclockwise so that the saw chain does not turn. If the idling speed is too slow, turn the screw clockwise. 4. Make a test cut and adjust the H needle for best cutting power, not for maximum speed.
G2500 / G2500 OPS • • This saw is equipped with a chain brake that will stop the chain in the event of kickback if operating properly. You must check the chain brake operation before each usage by running the saw at full the throttle for I 2 seconds and pushing the front hand guard forward. The chain should stop immediately with the engine at full speed. If the chain is slow to stop or does not stop, replace the brake band and clutch drum before use.
G2500 / G2500 OPS 7. Maintenance WARNING WARNING Before cleaning, the inspecting or repairing the unit, make sure that engine has stopped and is cool. Disconnect the spark plug to prevent accidental starting. When returning the filter, use a pinch not to be folded the suction pipe. 3. Oil filter ■ MAINTENANCE AFTER EACH USE 1. Air filter 1. With a wire hook, take out the oil filter from the feeding port. Loosen the knob and remove the air cleaner cover.
G2500 / G2500 OPS 7. Muffler WARNING If you do not attach the muffler correctly, after engine starts, the muffler will be loosen and the hightemperature exhaust gas spout. After cleaning the muffler, pay attention to fit up the muffler according to the explanation as follows. 1. Muffler body, muffler cover and baffle will be combined correctly. 8.
G2500 / G2500 OPS side of a cutter. If a gap is observed between them, the rail is normal. Otherwise, the bar rail is worn. Such a bar needs to be corrected or replaced. WARNING Be sure to round off the front edge to reduce the chance of kickback or tie-strap breakage. Ruler Make sure every cutter has the same length and edge angles as illustrated.
G2500 / G2500 OPS 10. Specifications Power unit: G2500 / G2500 OPS Displacement (cm3): ............................................. 25.4 Fuel: ................ Mixture (Gasoline 50 : Two-cycle oil 1) Fuel tank capacity (cm3): ....................................... 230 Chain oil: ................................. Motor oil SAE# 10W-30 Oil tank capacity (cm3): .......................................... 160 Carburetor: ......................................... Diaphragm type lgnition system:: ..............
G2500 / G2500 OPS 11. Limited warranty Should any failure occur on the product under normal operating conditions within the applicable warranty period, the failed part will be replaced or repaired free of charge by a KOMATSU ZENOAH authorized dealer. WARRANTY PERIOD: 1 year (6 months if used professionally, and 30 days if used for rental purpose) from the date of initial purchase. THE PURCHASER SHALL BEAR COSTS OF TRANSPORTING THE UNIT TO AND FROM THE KOMATSU ZENOAH DEALER.
