Product Instruction Manual
Page 30
... X Carburetor Readjust idle X Readjust electrode gap X Spark plug Replace after every 100 operating hours Cooling inlets Visual inspection Clean X X Valve clearance Check and adjust if necessary after 139 hours of operating, then every 150 hours X Sparl arresting screen2) in muffler Check Clean or ... screws and nuts (not adjusting screws) Retighten X Antivibration elements Check X Have replaced by dealer1) X X 28 BR 500, BR 550, BR 600 before starting work after first 139 hours of operation X Combustion chamber Decoke after finishing work area, etc.), shorten...
... X Carburetor Readjust idle X Readjust electrode gap X Spark plug Replace after every 100 operating hours Cooling inlets Visual inspection Clean X X Valve clearance Check and adjust if necessary after 139 hours of operating, then every 150 hours X Sparl arresting screen2) in muffler Check Clean or ... screws and nuts (not adjusting screws) Retighten X Antivibration elements Check X Have replaced by dealer1) X X 28 BR 500, BR 550, BR 600 before starting work after first 139 hours of operation X Combustion chamber Decoke after finishing work area, etc.), shorten...
Technical Guide
Page 9
..., chain tensioner Bearing and sliding surfaces for throttle trigger, brake lever and trigger interlock STIHL special lubricant 0781 417 1315 Bearing bore in rope rotor, rewind spring in fan housing STIHL Press Fluid OH 723 0781 957 9000 Rubber elements Standard commercially available CFC and HFC-free...number 4282 708 6300 4282 708 6310 4282 708 6320 4282 708 6330 4282 710 9100 Use Straight nozzle for BR 500, BR 550 Straight nozzle for BR 600 Bent nozzle for BR 500, BR 550 Bent nozzle for adjusting valve clearance 4282 007 1001 Set of parts for BR 600 BR 500, BR 550, BR 600 Page 9 4.
..., chain tensioner Bearing and sliding surfaces for throttle trigger, brake lever and trigger interlock STIHL special lubricant 0781 417 1315 Bearing bore in rope rotor, rewind spring in fan housing STIHL Press Fluid OH 723 0781 957 9000 Rubber elements Standard commercially available CFC and HFC-free...number 4282 708 6300 4282 708 6310 4282 708 6320 4282 708 6330 4282 710 9100 Use Straight nozzle for BR 500, BR 550 Straight nozzle for BR 600 Bent nozzle for BR 500, BR 550 Bent nozzle for adjusting valve clearance 4282 007 1001 Set of parts for BR 600 BR 500, BR 550, BR 600 Page 9 4.
Technical Guide
Page 13
...the throttle shutter, fuel is cold. Remove O-ring (2), valve cover (3) and gasket (4) . Kit 4282 007 1001 "Parts for users. 5.4 Valve clearance The valve clearance must be removed when making the standard setting. . Remove the air guide shroud. . The valve clearance may only be checked once after approx. 139 hours of... is equipped with rewind starter . See instructions for use, "Setting the carburetor," to set the carburetor for adjusting valve clearance" must be checked and adjusted when the engine is also sent through the main nozzle into the the air cone (Venturi...
...the throttle shutter, fuel is cold. Remove O-ring (2), valve cover (3) and gasket (4) . Kit 4282 007 1001 "Parts for users. 5.4 Valve clearance The valve clearance must be removed when making the standard setting. . Remove the air guide shroud. . The valve clearance may only be checked once after approx. 139 hours of... is equipped with rewind starter . See instructions for use, "Setting the carburetor," to set the carburetor for adjusting valve clearance" must be checked and adjusted when the engine is also sent through the main nozzle into the the air cone (Venturi...
Technical Guide
Page 14
...piston consequently passes through the top dead centre twice in order to the STIHL Service Training System "Carburetor", under the heading four-stroke principle. This represents the change of the crankshaft. Cam (1) points downward. Top dead centre, valve overlap Top dead centre, ignition 2 2 3 3 1 1 254TI010... power stroke. Refer to execute one power stroke. The valve clearance must be set at which the piston ends its upward stroke and starts its downward stroke. The inlet and exhaust valves are only closed simultaneously in every two revolutions of cycle between...
...piston consequently passes through the top dead centre twice in order to the STIHL Service Training System "Carburetor", under the heading four-stroke principle. This represents the change of the crankshaft. Cam (1) points downward. Top dead centre, valve overlap Top dead centre, ignition 2 2 3 3 1 1 254TI010... power stroke. Refer to execute one power stroke. The valve clearance must be set at which the piston ends its upward stroke and starts its downward stroke. The inlet and exhaust valves are only closed simultaneously in every two revolutions of cycle between...
Technical Guide
Page 15
... do not move up with the ignition coil. Technical Information 08.2005 5.4.3 Determine top dead centre Page 15 5.4.4 Check valve clearance The cam disk cover must be turned backwards in order to eliminate the flank backlash from the timing gear. Turn the crankshaft...crankshaft once more until the tip of the flywheel is lined up and down (see arrows), the piston is found to "Check the valve clearance" and "Set the valve clearance". . the setting gauge must produce a slight suction effect when it is in the top dead centre for ignition. . TI_08_2005_11_01_02.fm Rotate...
... do not move up with the ignition coil. Technical Information 08.2005 5.4.3 Determine top dead centre Page 15 5.4.4 Check valve clearance The cam disk cover must be turned backwards in order to eliminate the flank backlash from the timing gear. Turn the crankshaft...crankshaft once more until the tip of the flywheel is lined up and down (see arrows), the piston is found to "Check the valve clearance" and "Set the valve clearance". . the setting gauge must produce a slight suction effect when it is in the top dead centre for ignition. . TI_08_2005_11_01_02.fm Rotate...
Technical Guide
Page 16
... 08.2005 5.4.6 Assembly Use the gaskets in kit 4282 007 1001 "Parts for adjusting valve clearance". . Insert setting gauge (1) between rocker arm and valve stem Depending on the momentary valve clearance: . Turn nut (2) clockwise to reduce the valve clearance or anticlockwise to increase it warm up . Check the valve clearance again and re-adjust if necessary . Switch off engine .
... 08.2005 5.4.6 Assembly Use the gaskets in kit 4282 007 1001 "Parts for adjusting valve clearance". . Insert setting gauge (1) between rocker arm and valve stem Depending on the momentary valve clearance: . Turn nut (2) clockwise to reduce the valve clearance or anticlockwise to increase it warm up . Check the valve clearance again and re-adjust if necessary . Switch off engine .
Technical Guide
Page 17
... 850 2000 (1) into the sparkplug hole. the target is 7.5 ... 8.5 bar If the compression is still under 7.5 bar . Check the cylinder, valve seat, piston and piston rings for the spark gap to approx. 2 mm. TI_08_2005_11_01_02.fm Remove the ignition system tester from the spark window, high-... at least 1 cm away from the spark plug, and screw out the spark plug. . Connect the spark plug boot to the muffler. . Check valve clearance, set if necessary and recheck the compression If the compression is under 7.5 bar . Affix the ground terminal (2) to the high voltage terminal (1). ....
... 850 2000 (1) into the sparkplug hole. the target is 7.5 ... 8.5 bar If the compression is still under 7.5 bar . Check the cylinder, valve seat, piston and piston rings for the spark gap to approx. 2 mm. TI_08_2005_11_01_02.fm Remove the ignition system tester from the spark window, high-... at least 1 cm away from the spark plug, and screw out the spark plug. . Connect the spark plug boot to the muffler. . Check valve clearance, set if necessary and recheck the compression If the compression is under 7.5 bar . Affix the ground terminal (2) to the high voltage terminal (1). ....
Technical Guide
Page 22
... tube 19 Replace gearhead or bearing housing 20 Limit stop or deflector 21 Drive shaft 22 Fuel tank 23 Test the compression pressure 24 Set valve clearance 25 Replace crankcase, bottom half 26 Replace crankshaft 27 Replace cylinder, piston 28 Oil supply 29 Oil pump, trial run 30 Back plate 31 ... hose with nozzle and control handle 35 Arrester * Trial run under load BR 500 BR 550 BR 600 60 100 100 - 40 - 15 15 10 30 10 10 - 10 5 10 - - - - - 10 10 10 150 160 180 - - 5 5 50 30 30 30 © ANDREAS STIHL AG & Co. Repair procedure 1 Removing and refitting the engine 2 Crankcase, pressure ...
... tube 19 Replace gearhead or bearing housing 20 Limit stop or deflector 21 Drive shaft 22 Fuel tank 23 Test the compression pressure 24 Set valve clearance 25 Replace crankcase, bottom half 26 Replace crankshaft 27 Replace cylinder, piston 28 Oil supply 29 Oil pump, trial run 30 Back plate 31 ... hose with nozzle and control handle 35 Arrester * Trial run under load BR 500 BR 550 BR 600 60 100 100 - 40 - 15 15 10 30 10 10 - 10 5 10 - - - - - 10 10 10 150 160 180 - - 5 5 50 30 30 30 © ANDREAS STIHL AG & Co. Repair procedure 1 Removing and refitting the engine 2 Crankcase, pressure ...