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Kickback, 6.2.2 Chain Saw Kickback Standards, Kickback

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English 6.2 Kickback 6.2.1 Kickback WARNING Kickback may occur when the moving chain near the upper quadrant of the bar nose contacts a solid object or is pinched. ￭ When this occurs, the energy driving the chain can create a force that moves the chain saw in a direction opposite to the chain movement at the point where the chain is slowed or stopped. This may fling the bar up and back in a lightning fast reaction mainly in the plane of the bar and can cause severe or fatal injury to the operator. ￭ Kickback may occur, for example, when the chain near the upper quadrant of the bar nose contacts the wood or is pinched during limbing or when it is incorrectly used to begin a plunge or boring cut. ￭ The greater the force of the kickback reaction, the more difficult it becomes for the operator to control the chain saw. Many factors influence the occurrence and force of the kickback reaction. These include chain speed, the speed at which the bar and chain contact the object, the 0000-GXX-1374-A0 6 Kickback and Other Reactive Forces location and angle of contact, the condition of the chain, and how quickly the chain is slowed or stopped, among other factors. - The type of bar and chain you use is an important factor in the occurrence and force of the kickback reaction. Some STIHL bar and chain types are designed to reduce kickback forces. - STIHL recommends the use of reduced kickback bars and low kickback chains. 6.2.2 Chain Saw Kickback Standards The following standards apply with respect to kickback: - § 5.11 of ANSI/OPEI B175.1 This standard, referred to as "the chain saw kickback standard" in this chapter, sets certain performance and design criteria related to chain saw kickback. To comply with the chain saw kickback standard: a) Chain saws with a displacement of less than 3.8 cu. in. (62 cm³): - must, in their original condition, meet a 45° computerderived kickback angle when equipped with certain cutting attachments; and - must be equipped with at least two devices to reduce the risk of kickback injury, such as a chain brake, low kickback chain, reduced kickback bar, etc. b) Chain saws with a displacement of 3.8 cu. in. (62 cm³) and above: - must be equipped with at least one device designed to reduce the risk of kickback injury, such as a chain brake, low kickback chain, reduced kickback bar, etc. The computer derived angles for chain saws below 3.8 cu. in. (62 cm³) displacement are measured by applying a computer program to test results from a kickback test machine. 20 0458-758-8621-B

Section	Page
1 Introduction	5
2 Guide to Using this Manual	5
2.1 Signal Words	5
2.2 Symbols in Text	5
3 Main Parts	6
3.1 Chain Saw	6
4 Safety Symbols on the Product	7
4.1 Chain Saw	7
5 IMPORTANT SAFETY INSTRUCTIONS	8
5.1 Intended Use	8
5.2 Operator	8
5.3 Personal Protective Equipment	9
5.4 Chain Saw	10
5.5 Fueling Instructions	11
5.6 Using the Chain Saw	15
5.6.1 Before Operation	15
5.6.2 Starting	16
5.6.3 Holding and Controlling the Chain Saw	16
5.6.4 Working Conditions	18
5.6.5 Operating Instructions	19
6 Kickback and Other Reactive Forces	21
6.1 Reactive Forces	21
6.2 Kickback	22
6.2.1 Kickback	22
6.2.2 Chain Saw Kickback Standards	22
6.2.3 Devices for Reducing the Risk of Kickback Injury	23
6.2.4 To Avoid Kickback	26
6.3 Pull-in	26
6.4 Pushback	27
7 Proper Techniques for Basic Bucking, Limbing, Pruning and Felling	27
7.1 Bucking	27
7.2 Cutting Logs Under Tension	28
7.3 Limbing	28
7.4 Pruning	29
7.5 Felling	30
7.5.1 Felling Conditions	30
7.5.2 Escape Path	31
7.5.3 Conventional Notch	31
7.5.4 Open-faced Notch	32
7.5.5 Sapwood Cuts	32
7.5.6 Felling Back Cut	32
7.5.7 Fan Cut	33
7.5.8 Sectioning Method	33
7.5.9 Plunge-cut Method	34
8 Maintenance, Repair and Storage	35
8.1 Warnings and Instructions	35
9 Before Starting Work	35
9.1 Preparing the Chain Saw for Operation	35
10 Assembling the Chain Saw	36
10.1 Cutting Attachment	36
10.2 Mounting and Removing the Guide Bar and Chain	36
10.2.1 Mounting the Guide Bar and Chain	36
10.2.2 Removing the Guide Bar and Chain	37
10.3 Tensioning the Chain	37
11 Lubricating the Saw Chain and Guide Bar	38
11.1 Bar and Chain Lubricant	38
11.2 Filling the Chain Oil Tank	38
11.3 Adjusting the Flow of Bar and Chain Oil	39
12 The Chain Brake	40
12.1 Engaging the Chain Brake	40
12.2 Disengaging the Chain Brake	40
12.3 Maintaining the Chain Brake	41
13 Mixing Fuel and Refueling the Chain Saw	41
13.1 Mixing Fuel	41
13.2 Refueling the Chain Saw	42
14 Starting the Engine	45
14.1 Holding the Chain Saw	45
14.2 Starting Procedure	45
14.3 Pre-Starting Procedure	45
14.4 Starting the Engine	46
15 Shutting Off the Engine	47
15.1 Shutting Off the Engine	47
16 Checking the Chain Saw	47
16.1 Checking the Operation of the Chain Brake	47
16.2 Testing the Controls	48
16.3 Testing Chain Lubrication	48
17 Adjusting the Carburetor	49
17.1 Winter Operation	49
17.2 Summer Operation	49
17.3 Adjusting the Carburetor for Operation at High Altitude	50
17.4 Adjusting the Carburetor for Operation at Temperatures Below 14 °F (- 10 °C)	50
17.5 Standard Carburetor Setting	51
18 After Finishing Work	51
18.1 Preparing for Transportation or Storage	51
19 Transporting	51
19.1 Transporting the Chain Saw	51
20 Storing	52
20.1 Storing the Chain Saw	52
21 Cleaning	52
21.1 Cleaning the Chain Saw	52
21.2 Cleaning the Guide Bar and Saw Chain	52
21.3 Cleaning the Air Filter	53
21.4 Cleaning the Spark Plug	54
22 Inspection and Maintenance	56
22.1 Inspection and Maintenance Chart	56
22.2 Inspecting and Maintaining the Chain Saw	57
22.3 Inspecting and Maintaining the Chain Sprocket	57
22.4 Inspecting and Maintaining the Guide Bar	57
22.5 Inspecting, Maintaining and Sharpening the Saw Chain	58
23 Troubleshooting Guide	62
23.1 Chain saw	62
23.2 Adjusting Idle Speed	63
23.3 Clearing the Combustion Chamber	63
24 Specifications	64
24.1 EPA	64
24.2 STIHL MS 661	64
24.3 Chain Sprockets	65
24.4 Minimum Groove Depth of Guide Bars	65
24.5 Depth Gauge Setting	65
24.6 Symbols on the Chain Saw	65
24.7 Engineering Improvements	65
25 Combinations of Guide Bars and Saw Chains	66
25.1 STIHL MS 661	66
26 Replacement Parts and Equipment	68
26.1 Genuine STIHL Replacement Parts	68
27 Disposal	68
27.1 Disposal of the Power Tool	68
28 Limited Warranty	68
28.1 STIHL Incorporated Limited Warranty Policy	68
29 Emission Control Warranty	68
29.1 STIHL Incorporated Federal Emission Control Warranty Statement	68
30 Trademarks	70
30.1 Registered Trademarks	70
30.2 Common Law Trademarks	71
31 Addresses	71
31.1 STIHL Incorporated	71
1 Introducción	74
2 Acerca de este manual de instrucciones	74
2.1 Palabras identificadoras	74
2.2 Símbolos en el texto	74
3 Componentes importantes	75
3.1 Motosierra	75
4 Símbolos de seguridad en el producto	76
4.1 Motosierra	76
5 INSTRUCCIONES IMPORTANTES DE SEGURIDAD	77
5.1 Uso previsto	77
5.2 Operador	77
5.3 Equipos de protección personal	78
5.4 Motosierra	79
5.5 Instrucciones para el llenado de combustible	80
5.6 Uso de la motosierra	85
5.6.1 Antes de usar	85
5.6.2 Arranque	86
5.6.3 Sujeción y control de la motosierra	87
5.6.4 Condiciones de trabajo	88
5.6.5 Instrucciones de manejo	90
6 Contragolpe y otras fuerzas reactivas	92
6.1 Fuerzas reactivas	92
6.2 Contragolpe	93
6.2.1 Contragolpe	93
6.2.2 Normas para el contragolpe de las motosierras	93
6.2.3 Dispositivos para reducir el riesgo de lesiones por contragolpe	94
6.2.4 Para evitar el contragolpe	97
6.3 Tirones	98
6.4 Rechazo	98
7 Técnicas adecuadas para el tronzado, el desramado, la poda y la tala básicos	99
7.1 Tronzado	99
7.2 Corte de troncos bajo tensión	100
7.3 Desrame	100
7.4 Poda	101
7.5 Tala	102
7.5.1 Condiciones de tala	102
7.5.2 Ruta de escape	103
7.5.3 Entalla convencional	103
7.5.4 Entalla de cara libre	104
7.5.5 Cortes de albura	104
7.5.6 Corte trasero de tala	104
7.5.7 Corte en abanico	105
7.5.8 Método de corte por secciones	105
7.5.9 Corte por penetración	106
8 Mantenimiento, reparación y almacenamiento	107
8.1 Advertencias e instrucciones	107
9 Antes de empezar a trabajar	108
9.1 Preparación de la motosierra para el funcionamiento:	108
10 Armado de la motosierra	108
10.1 Accesorio de corte	108
10.2 Montaje y retiro de la espada y la cadena de aserrado	108
10.2.1 Montaje de la espada y la cadena	108
10.2.2 Retiro de la espada y la cadena	110
10.3 Tensado de la cadena	110
11 Lubricación de la cadena de aserrado y de la espada	111
11.1 Lubricante de espadas y cadenas	111
11.2 Llenado del depósito de aceite de la cadena	111
11.3 Ajuste del flujo del aceite de la espada y la cadena	112
12 El freno de cadena	113
12.1 Accionamiento del freno de la cadena	113
12.2 Cómo soltar el freno de la cadena	114
12.3 Mantenimiento del freno de la cadena	114
13 Mezcla del combustible y carga de combustible en la motosierra	114
13.1 Mezcla del combustible	114
13.2 Carga de combustible en la motosierra	116
14 Arranque del motor	119
14.1 Sujeción de la motosierra	119
14.2 Procedimiento de arranque	119
14.3 Procedimiento antes del arranque	119
14.4 Arranque del motor	120
15 Apagado del motor	121
15.1 Apagado del motor	121
16 Revisión de la motosierra	121
16.1 Control del funcionamiento del freno de la cadena	121
16.2 Prueba de los controles	122
16.3 Prueba de la lubricación de la cadena	122
17 Ajuste del carburador	123
17.1 Manejo durante el invierno	123
17.2 Manejo durante el verano	123
17.3 Corrección del ajuste del carburador para uso a alturas grandes	124
17.4 Corrección del carburador para trabajar a temperaturas menores que -10°C (14°F)	124
17.5 Ajuste estándar del csarburador	125
18 Después de completar el trabajo	125
18.1 Preparación para el transporte o el almacenamiento	125
19 Transporte	126
19.1 Transporte de la motosierra	126
20 Almacenamiento	126
20.1 Almacenamiento de la motosierra	126
21 Limpieza	127
21.1 Limpieza de la motosierra	127
21.2 Limpieza de la espada y la cadena de aserrado	127
21.3 Limpieza del filtro de aire	127
21.4 Limpieza de la bujía	129
22 Inspección y mantenimiento	130
22.1 Tabla de inspección y mantenimiento	130
22.2 Inspección y mantenimiento de la motosierra	131
22.3 Revisión y mantenimiento del piñón de cadena	131
22.4 Inspección y mantenimiento de la espada	131
22.5 Inspección, mantenimiento y afilado de la cadena de aserrado	132
23 Guía de solución de problemas	136
23.1 Motosierra	136
23.2 Ajuste de marcha en vacío	138
23.3 Despejado de la cámara de combustión	138
24 Especificaciones	139
24.1 E.P.A.	139
24.2 STIHL MS 661	139
24.3 Piñones de cadena	140
24.4 Profundidad de ranura mínima para las espadas	140
24.5 Ajuste de calibrador de profundidad	140
24.6 Símbolos en la motosierra	140
24.7 Mejoramientos técnicos	140
25 Combinaciones de espadas y cadenas de aserrado	141
25.1 STIHL MS 661	141
26 Piezas y equipos de repuesto	144
26.1 Piezas de repuesto originales de STIHL	144
27 Eliminación	144
27.1 Desecho de la herramienta motorizada	144
28 Garantía limitada	144
28.1 Política de garantía limitada de STIHL Incorporated	144
29 Garantía del sistema de control de emisiones	144
29.1 Declaración de garantía de STIHL Incorporated sobre sistemas de control de emisiones según normas Federales	144
30 Marcas comerciales	147
30.1 Marcas comerciales registradas	147
30.2 Marcas comerciales por ley común	147
31 Direcciones	147

Match case Limit results 1 per page

0458-758-8621-B

English

6 Kickback and Other Reactive Forces

6.2

Kickback

6.2.1

Kickback

WARNING

￭

When this occurs, the energy driving the chain can create

a force that moves the chain saw in a direction opposite to

the chain movement at the point where the chain is slowed

or stopped. This may fling the bar up and back in a

lightning fast reaction mainly in the plane of the bar and

can cause severe or fatal injury to the operator.

￭

Kickback may occur, for example, when the chain near the

upper quadrant of the bar nose contacts the wood or is

pinched during limbing or when it is incorrectly used to

begin a plunge or boring cut.

￭

The greater the force of the kickback reaction, the more

difficult it becomes for the operator to control the chain

saw. Many factors influence the occurrence and force of

the kickback reaction. These include chain speed, the

speed at which the bar and chain contact the object, the

location and angle of contact, the condition of the chain,

and how quickly the chain is slowed or stopped, among

other factors.

–

The type of bar and chain you use is an important

factor in the occurrence and force of the kickback

reaction. Some STIHL bar and chain types are

designed to reduce kickback forces.

–

STIHL recommends the use of reduced kickback

bars and low kickback chains.

6.2.2

Chain Saw Kickback Standards

The following standards apply with respect to kickback:

–

§ 5.11 of ANSI/OPEI B175.1

This standard, referred to as "the chain saw kickback

standard" in this chapter, sets certain performance and

design criteria related to chain saw kickback.

To comply with the chain saw kickback standard:

a)Chain saws with a displacement of less than 3.8 cu. in.

(62 cm³):

–

must, in their original condition, meet a 45° computer-

derived kickback angle when equipped with certain

cutting attachments; and

–

must be equipped with at least two devices to reduce

the risk of kickback injury, such as a chain brake, low

kickback chain, reduced kickback bar, etc.

b)Chain saws with a displacement of 3.8

cu. in. (62

cm³) and

above:

–

must be equipped with at least one device designed to

reduce the risk of kickback injury, such as a chain brake,

low kickback chain, reduced kickback bar, etc.

The computer derived angles for chain saws below

3.8 cu. in. (62 cm³) displacement are measured by applying

a computer program to test results from a kickback test

machine.

Kickback may occur when the moving chain near

the upper quadrant of the bar nose contacts a

solid object or is pinched.

0000-GXX-1374-A0