848J6093A0 (311) G B OWNER’S MANUAL BRUSHCUTTERS BC2002 TR2001 GB-1
EXPLANATION OF SYMBOLS AND SAFETY WARNINGS WARNING!!! RISK OF DAMAGING HEARING IN NORMAL CONDITIONS OF USE, THIS MACHINE MAY INVOLVE A DAILY LEVEL OF PERSONAL EXPOSURE TO NOISE FOR THE OPERATOR EQUAL TO OR GREATER THAN 85 dB(A) MODEL 21.7 cm3 GB-2 SOUND LEVEL ISO 10884 LwA measured guaranteed 106.47 dB(A) 108 dB(A) VIBRATION LEVEL ISO 7916 idling racing 2.7 m/s2 3.
G B SAFETY FIRST Instructions contained in warnings within this manual marked with a symbol concern critical points which must be taken into consideration to prevent possible serious bodily injury, and for this reason you are requested to read all such instructions carefully and follow them without fail. WARNINGS IN THE MANUAL WARNING This mark indicates instructions, which must be followed in order to prevent accidents, which could lead to serious bodily injury or death.
1. Parts location 5 [BC2002] (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) 3 Primer pump Air cleaner cover Choke lever Fuel tank Starter knob Line head Gear case Debris guard Loop handle Drive shaft housing Sholder strap hanger Throttle lever Ignition switch Throttle cable 14 2 1 13 3 11 14 12 2 1 9 13 4 11 12 9 10 10 7 8 6 7 8 6 2. Specification Overall size (L W H) ............................ 1795 x 230 x 303 / 1795 x 340 x 303 mm Dry weight ......................
3. Warning labels on the machine Read owner’s manual before operating this machine. Wear head, eye and ear protection. If warning label peels off or becomes soiled and impossible to read, you should contact the dealer from which you purchased the product to order new labels and affix them in the required location(s). Never modify your machine. We won’t warrant the machine, if you use the remodeled brushcutter or if you don’t observe the proper usage written in the manual.
5. For safe operation 1. Read this manual carefully until you completely understand and follow all safety and operating instructions. 2. Keep this manual handy so that you may refer to it later whenever any questions arise. Also note, if you have any questions which cannot be answered herein, contact the dealer from whom you purchased the product. 3. Always be sure to include this manual when selling, lending, or otherwise transferring the ownership of this product. 4.
5. For safe operation BEFORE STARTING THE ENGINE 1. The area within a perimeter of 15 m of the person using the product should be considered a hazardous area into which no one should enter. If necessary, yellow warning rope, warning signs should be placed around the perimeter of the area.
5. For safe operation could result in serious burns or electrical shock. • IF SOMEONE COMES 1. Guard against hazardous situations at all times. Warn adults to keep pets and children away from the area. Be careful if you are approached. Injury may result from flying debris. 2. If someone calls out or otherwise interrupts you while working, always be sure to turn off the engine before turning around. MAINTENANCE 1.
6. Set up INSTALLING HANDLE INSTALLING CUTTING HEAD G B • Install the handle to the shaft tube and clamp. INSTALLING DEBRIS GUARD • Attach the guard to the bracket on the main pipe and fix it with 2 screws. 1. While locking the gear shaft, by inserting the supplied tool into the upper holder on the gearbox, loosen and remove the hexagon nut (left-handed). 2. Then screw in the cutting head to the gear shaft over the holders. Hand-tighten it securely. BALANCE UNIT 1. Put on strap and attach unit to strap.
7. Fuel ■ 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.
8. Operation STARTING ENGINE WARNING WARNING The cutting head will start rotating upon the engine starts. 1. Feed fuel into the fuel tank and tighten the cap securely. The product is equipped with a centrifugal clutch mechanism, so the cutting attachment begins to rotate as soon as the engine is started by putting the throttle into the start position.
8. Operation ADJUSTING THROTTLE CABLE • The normal play is 1 or 2 mm when measured at the carburetor side end. Readjust with the cable adjuster as required. TRIMMING GRASS AND WEEDS • Always remember that the TIP of the line does cutting. You will achieve better results by not crowding the line into the cutting area. Allow the unit to trim at its own pace. 1. Hold the unit so the head is off the ground and is tilted about 20 degrees toward the sweep direction. .
9. Maintenance System/components ENGINE fuel leaks, fuel spillage fuel tank, air filter, fuel filter idle adjusting screw spark plug SHAFT cylinder fins, intake air cooling vent muffler, spark arrester, cylinder exhaust port throttle lever, ignition switch cutting parts gear case screws/nuts/bolts debris guard Every Every Every 50 100 Before 25 Procedure Note use hours hours hours after after after wipe out ✔ inspect/clean ✔ ✔ replace, if necessary see adjusting replace carburetor ✔ idling speed (p.
9. Maintenance SPARK PLUG • Starting failure and misfiring are often caused by a fouled spark plug. Clean the spark plug and check that the plug gap is in the correct range. For a replacement plug, use the correct type specified by KOMATSU ZENOAH. GEAR CASE • The reduction gears are lubricated by multipurpose, lithium-based grease in the gear case. Supply new grease every 25 hours of use or more often depending on the job condition.
9. Maintenance PROCEDURES TO BE PERFORMED AFTER EVERY 100 HOURS OF USE 3. Take out the spool and pull off the old line. Put one end of new line through the spool holes and pull it until the length is equal between each part of the line. G B 1. Remove the muffler, insert a screwdriver into the vent, and wipe away any carbon buildup. Wipe away any carbon buildup on the muffler exhaust vent and cylinder exhaust port at the same time. 4. Wind up the line in the correct direction as indicated on the spool.
11. Troubleshooting guide Case 1. Starting failure CHECK fuel tank fuel filter carburetor adjustment screw sparking (no spark) spark plug → → → → → → PROBABLE CAUSES incorrect fuel fuel filter is clogged out of normal range spark plug is fouled/wet plug gap is incorrect disconnected Case 2.
