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Summary of Contents for Stihl 4282 Series
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Page 1: Table Of Contents
STIH) Technical Information 08.2005 New STIHL BR 500, BR 550 and BR 600 backpack blowers – Series 4282 Contents 1. Technical description 2. Specifications 3. Accessories 4. Service accessories and special tools 5. Service notes englisch / English TI_08_2005_11_01_02.fm... -
Page 2: Technical Description
Page 2 Technical Information 08.2005 Technical description The new STIHL BR 500, BR 550 and BR 600 backpack blowers are three ideal models for demanding, professional users. Blowing system with electrostatic arrester The BR 500 is especially low-noise yet highly powerful for use in noise-sensitive areas. - Page 3 Technical Information 08.2005 Page 3 Control handle Simplified starting For simplified starting, the choke does not have to All operating elements for starting are on a central be set on the control handle. control area. Set the starting throttle position with Since the setting lever does not lock at the choke knob.
- Page 4 Page 4 Technical Information 08.2005 Blower holder STIHL 4-MIX engine For storage and transport: The 4-MIX engine works with mixed lubrication. Unlike a conventional four-stroke engine, the 4-MIX engine does not have any supply of oil in the crankcase. The engine is lubricated entirely with a mixture of petrol and engine oil.
- Page 5 Technical Information 08.2005 Page 5 1.5.1 Engine design 1.5.2 Engine control Single-cylinder engine with overhead valves. Overhead valves (OHV), one exhaust valve (1) Cylinder head, cylinder and upper half of crankcase and one inlet valve (2) have been combined into a single unit. Valve control via crankshaft gear (3), The crankcase is horizontally split along the cam disk (4), lever (5), pushrod (6) and...
- Page 6 Page 6 Technical Information 08.2005 1.5.3 Engine lubrication The engine is lubricated in two phases during each revolution of the crankshaft. Phase 1 Phase 2 The piston rises to the top dead centre. The piston descends to the bottom dead centre. The increase in volume in the crankcase produces Excess pressure builds up in the crankcase due to a vacuum.
- Page 7 Technical Information 08.2005 Page 7 Decompression system Carburetor The automatic decompression system reduces the All-position diaphragm carburetor with compression upon starting and hence the required independent idle pull on the starter rope. The range of the high-speed adjusting screw (H) and the low-speed adjusting screw (L) is limited by limiter caps (approx.
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Page 8: Specifications
Page 8 Technical Information 08.2005 Specifications Engine BR 500 BR 550 BR 600 Displacement 64.8 cm Cylinder bore 50 mm Piston stroke 33 mm Idle speed 2,500 rpm Operating speed with nozzle 5,500 rpm 6,100 rpm 7,200 rpm Maximum air flow 1,380 m³/h 1,490 m³/h 1,720 m³/h... -
Page 9: Accessories
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 Cleaning crankshaft stub and cone on flywheel... - Page 10 Page 10 Technical Information 08.2005 Special servicing tools To be procured for the first time for the STIHL BR 500, 550, 600: Part name Part number Stop screw 4282 890 2700 Block crankshaft Sleeve 5910 893 1704 Fit hookless snap rings in piston The available special tools are listed in the repair instructions for the STIHL BR 500, 550, 600.
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Page 11: Service Notes
Technical Information 08.2005 Page 11 Service notes The limiter caps are fitted over the knurled head of the adjusting screws. The stop on the carburetor housing serves as a limiter. Carburetor adjustment 5.1.2 Maintenance / repair 270° 270° With this carburetor, the high-speed adjusting screw (H) and low-speed adjusting screw (L) can only be adjusted by the user within a range of 270°... - Page 12 Page 12 Technical Information 08.2005 5.1.3 Basic setting without limiter cap 5.1.4 Securing the limiter caps Starting from the tight position of the adjusting Used caps may not be reused, as they are damaged screws: when pulled off. Align the new limiter caps for the adjusting Open H = 2 turns screws on the stop knob (arrow) and press on Open L = 3 1/2 turns...
- Page 13 Technical Information 08.2005 Page 13 Standard setting with limiter caps Valve clearance The limiter caps must not be removed when making The valve clearance must be checked once after the standard setting. approx. 139 hours of operation and adjusted if necessary.
- Page 14 The piston consequently passes through the top dead centre twice in order to execute one power stroke. Refer to the STIHL Service Training System "Carburetor", under the heading four-stroke principle.
- Page 15 Technical Information 08.2005 Page 15 5.4.3 Determine top dead centre 5.4.4 Check valve clearance The cam disk cover must be installed to "Check the valve clearance“ and "Set the valve clearance“. Rotate the crankshaft until the tip of the flywheel (arrow) is flush with the ignition coil as shown The piston is now at the top dead centre, valve overlap, or in top dead centre, ignition.
- Page 16 Page 16 Technical Information 08.2005 5.4.5 Set valve clearance 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: Fit gasket (1) in position (arrows) Turn nut (2) clockwise to reduce the valve Fit valve cover and tighten screw with a torque...
- Page 17 Technical Information 08.2005 Page 17 Test the compression pressure In order to discharge the ignition voltage, While using the ZAT 3, hold it only by the handle (4) the ZAT 3 5910 850 4520 ignition system tester or position it in a safe place. Fingers and other body must be mounted –...
- Page 18 Page 18 Technical Information 08.2005 Mounting the blower tube and arrester Clip the sleeve on the arrester into the holder Run the arrester (1) through the sliding ring (5). (arrow). With its wide lip facing left, shove the sliding ring (5) onto the blower tube end section (2). Run the arrester (1) through the blower tube (2).
- Page 19 Technical Information 08.2005 Page 19 Run the arrester (1) through the pleated hose Shove nozzle (13) (depending on the market (7) and hose clip (9) (hose clip with the retention region) onto blower tube (2), and lock the groove for the throttle cable) – screw head and buttons (14).
- Page 20 Tank vents must not be reused. Moisten the O-ring and bead with STIHL press fluid. The throttle cable may only be adjusted when the blower is completely assembled.
- Page 21 (4). Always use a new seal (5). Coat the entire seal with STIHL press fluid. The removal tab on the connecting element (arrow) must lie in the recess of the fuel tank.
- Page 22 29 Oil pump, trial run – 30 Back plate 31 Strap 32 Fan housing 33 Fanwheel 34 Pleated hose with nozzle and control handle 35 Arrester * Trial run under load © ANDREAS STIHL AG & Co. KG, 2005 Technical Documentation D1/MTK-ru TI_08_2005_11_01_02.fm...
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