{ STIHL SG 21 Instruction Manual
English © ANDREAS STIHL AG & Co. KG, 2018 0458-583-0121-A. VA4.J18. 0000007179_006_GB Printed on chlorine-free paper Printing inks contain vegetable oils, paper can be recycled.
English Guide to Using this Manual Pictograms All the pictograms attached to the machine are shown and explained in this manual. Safety Precautions and Working Techniques This instruction manual covers a STIHL sprayer which is also referred to as the unit in the descriptions. Special safety precautions must be observed when working with this sprayer. Symbols in text It is important that you read the instruction manual before first use and keep it in a safe place for future reference.
English Clothing and Equipment WARNING To reduce the risk of eye injuries, wear snug-fitting safety glasses in accordance with European Standard EN 166. Make sure the safety glasses are a good fit. Wear proper protective clothing and equipment when using, filling and cleaning the sprayer. Follow the chemical manufacturer's instructions with respect to protective equipment. Clothing must be snug-fitting but allow complete freedom of movement.
English Plant protection chemicals may be used only by persons trained in their handling and the appropriate first-aid measures. Keep instructions or label of the plant protection chemical available at all times in order to inform the doctor about the chemical concerned in an emergency. In an emergency, follow the chemical manufacturer's instructions provided or on the label. Observe manufacturer's safety data sheets.
English Disposal Dispose of plant protection chemicals in accordance with environmental requirements – follow instructions of chemical manufacturer. Never dispose of residual plant protection products or contaminated rinsing solutions in waterways, drains, sewers, street gutters or manholes. – Hold the sprayer with your right hand on the spray gun and your left hand on the pump handle. Walk slowly forwards as you work – observe the nozzle outlet at all times – do not walk backwards – risk of stumbling.
English 3 1 1 2 N Connect the hose (1) to the spray gun (2). N Connect the hose (1) to the tank (3). 6159BA004 KN Assembling the Unit 0000-GXX-0011-A0 KN When cleaning the tank, tube and hose system, make sure that other persons are not endangered by escaping liquid – risk of injury. N Ease the housing outwards and thread the strap through the openings from below. N Thread the ends of the strap through the buckle.
English Unlocking the pump handle Controls Tank Pressurizing the tank 6159BA007 KN Make yourself familiar with how the components function before using your sprayer for the first time. Pump Locking the pump handle N 1 Rotate the pump handle about a quarter turn until it disengages and can be moved up and down freely. Unlock the pump handle: to pressurize the tank N 6159BA008 KN 6159BA006 KN – Push the pump handle downwards and turn it until it engages.
English Depressurize the tank Preparing Unit for Operation N Operate spray gun trigger – pressure must escape. N Release spray gun trigger – pressure must not escape. N Pull out piston manometer – pressure must escape audibly. N Completely depressurize the tank. 6159BA010 KN Visual Inspection N Pull the piston manometer up all the way – pressure is released – wait until tank is completely depressurized. Do not operate your unit if any of its components are damaged.
English Filling the Container Spraying The tank must not be under pressure. Visual Inspection N Unscrew the pump from the tank. N Stand the tank securely on a level surface. Do not operate your unit if any of its components are damaged. It is particularly important to check the tank and hose connection for leaks. 0000-GXX-0014-A0 KN N Pour thoroughly mixed spray solution through the opening (arrow) – do not exceed maximum capacity (check max mark on scale). N Screw the pump into the tank.
English After Spraying N Completely depressurize the tank. N Unscrew the pump from the tank. N Drain the tank in a well-ventilated location – collect remaining solution in a suitable container. Dispose of any residual spray solution in accordance with environmental requirements – follow instructions of chemical manufacturer. N Rinse the tank with clean water. N Fill the tank with clean water, pump and spray until the tank is empty and completely depressurized.
English Cleaning the Filter and Nozzle 2 3 Lubricate the piston cup seal and Oring with a food-safe grease. 2 1 3 6159BA017 KN 2 N Push gland (1) with piston cup seal (2) into the cylinder barrel (3). N Hold the gland (1) steady with your thumb and push it into the cylinder barrel. SG 21 N Unscrew the hollow cone nozzle (1) with spinner insert (2) from the wand. N Rinse out all parts under running water and then reassemble.
English Complete unit Visual inspection (condition, leaks) after 50 refills as required if damaged if problem every 12 months monthly weekly before starting work The following intervals apply to normal operating conditions only. If your daily working times are longer, shorten the specified intervals accordingly.
English Main Parts 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 7 5 8 6 4 3 1 2 5 10 12 13 14 15 11 9 16 17 18 20 SG 21 0000-GXX-0017-A1 19 Hollow cone nozzle Spinner insert Filter Elbow Union nut Spray wand Spray gun Lever Hose Pump handle Piston rod Latch on pump cylinder Gland O-ring Pump barrel Piston cup seal Valve disk Piston manometer / relief valve Tank Shoulder strap 13
English Specifications Working Pressures / Spray Rates Working pressure 1.5 bar (21.75 PSI) 2.0 bar (29.0 PSI) 3.0 bar (43.5 PSI) Flow rate with hollow cone nozzle 0.49 l/min (29.9 cu.in/min) 0.56 l/min (34.2 cu.in/min) 0.69 l/min (42.1 cu.in/min) Specifications Working pressure, max.: 3 bar (43,5 PSI) Flow volume, max.: 1.0 l/min (61 cu. in./min) Solution capacity, 3l max.: (0.8 US gals) Total capacity: 4.2 l (1.1 US gals) Operating temperature, 30°C max.: (86°F) Residual solution in <0.04 l tank: (1.
English Troubleshooting Before starting any service work, operate the unit until it is no longer under pressure – if pressure is not released, chemical may escape unexpectedly when working on the unit. After servicing, carry out test run with clean water.
English Users of this machine may only carry out the maintenance and service work described in this user manual. All other repairs must be carried out by a servicing dealer. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information.
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