Kickback Safety Features - McCulloch MAC 20X Instruction Manual

Elbow locked
Thumb on underside of
handlebar
S Keep a good, firm grip on the saw with both
hands when the engine is running and
don't let go. A firm grip will help you reduce
kickback and maintain control of the saw.
Keep the fingers of your left hand encir-
cling and your left thumb under the front
handlebar. Keep your right hand complete-
ly around the rear handle whether your are
right handed or left handed. Keep your left
arm straight with the elbow locked.
S Position your left hand on the front handle-
bar so it is in a straight line with your right
hand on the rear handle when making
bucking cuts. Never reverse right and left
hand positions for any type of cutting.
S Stand with your weight evenly balanced on
both feet.
S Stand slightly to the left side of the saw to
keep your body from being in a direct line
with the cutting chain.
S Do not overreach. You could be drawn or
thrown off balance and lose control of the
saw.
S Do not cut above shoulder height. It is diffi-
cult to maintain control of saw above
shoulder height.

KICKBACK SAFETY FEATURES

: The following features are
WARNING
included on your saw to help reduce the hazard
of kickback; however, such features will not to-
tally eliminate this dangerous reaction. As a
chain saw user, do not rely only on safety de-
vices. You must follow all safety precautions,
instructions, and maintenance in this manual to
help avoid kickback and other forces which
can result in serious injury.
S Reduced- -Kickback Guide Bar, designed
with a small radius tip which reduces the size
of the kickback danger zone on the bar tip. A
Reduced- -Kickback Guide Bar has been
demonstrated to significantly reduce the
number and seriousness of kickbacks.
Reduced Kickback
Symmetrical
Guide Bar
Small Radius Tip
Symmetrical Guide Bar
Large Radius Tip
S Low- -Kickback Chain, designed with a
contoured depth gauge and guard link
which deflect kickback force and allow
wood to gradually ride into the cutter.
Low-Kickback Chain
Contoured Depth Gauge
Elongated Guard Link
Deflects Kickback
Force And Allows
Wood To Gradually
Ride Into Cutter
S Handguard, designed to reduce the
chance of your left hand contacting the
chain if your hand slips off the front handle-
bar.
S Position of front and rear handlebars, de-
signed with distance between handles and
"in-line" with each other. The spread and
"in-line" position of the hands provided by
this design work together to give balance
and resistance in controlling the pivot of
the saw back toward the operator if kick-
back occurs.
WARNING : DO NOT RELY UPON
ANY OF THE DEVICES BUILT INTO YOUR
SAW. YOU SHOULD USE THE SAW
PROPERLY AND CAREFULLY TO AVOID
KICKBACK. Reduced- -kickback guide bars
and low- -kickback saw chains reduce the
chance and magnitude of kickback and are
recommended. Your saw has a low kickback
chain and bar as original equipment. Re-
pairs on a chain brake should be made by an
authorized servicing dealer. Take your unit to
the place of purchase if purchased from a
servicing dealer, or to the nearest authorized
master service dealer.
S Tip contact in some cases may cause a
lightning fast reverse REACTION, kicking
the guide bar up and back toward the oper-
ator.
S Pinching the saw chain along the top of the
guide bar may push the guide bar rapidly
back toward the operator.
S Either of these reactions may cause you to
lose control of the saw which could result
in serious injury. Do not rely exclusively
upon the safety devices built into your saw.
6
DATOS TÉCNICOS
Datos técnicos
Motor
3
Cilindrada, cm
Carrera, mm
Régimen de ralentí, r.p.m.
Potencia, kW
Sistema de encendido
Bujía
Distancia de electrodos, mm
Sistema de combustible y lubricación
Capacidad del depósito de gasolina, litros
Caudal de la bomba de aceite a 8.500 r.p.m., ml/min.
Capacidad del depósito de aceite, litros
Tipo de bomba de aceite
Peso
Motosierra sin espada ni cadena, con depósitos vacíos, kg
Emisiones de ruido
(ver la nota 1)
Nivel de potencia acústica medido dB(A)
Nivel de potencia acústica garantizado L
WA
Niveles acústicos
(vea la nota 2)
Nivel equivalente de presión acústica en el oído del usuario, dB(A)
Niveles de vibración equivalentes, a
hv,eq
(vea la nota 3)
2
Mango delantero, m/s
2
Mango trasero, m/s
Cadena/barra guía
Longitud de barra estándar, pulgadas/cm
Longitudes de barra recomendadas, pulgadas/cm
Longitud efectiva de corte, pulgadas/cm
Paso, pulgadas
Grosor del eslabón de arrastre, pulgadas/mm
Tipo de piñón de arrastre/número de dientes
Velocidad de la cadena a potencia máxima, m/s
Nota 1: Emisiones sonoras en el entorno medidas como potencia acústica (L
directiva CE 2000/14/CE.
Nota 2: el nivel de presión sonora equivalente, según la norma ISO 22868, se calcula
como la suma de energÌa, ponderada en el tiempo, de los niveles de presión sonora en
diferentes condiciones de trabajo. La dispersión estadÌstica habitual del nivel de presión
sonora equivalente es la desviación tÌpica de 1 dB(A).
Nota 3: el nivel de vibración equivalente, según la norma ISO 22867, se calcula como la
suma de energÌa, ponderada en el tiempo, de los niveles de vibración en diferentes condi-
ciones de trabajo. Los datos referidos del nivel de vibración equivalente poseen una disper-
sión estadÌstica habitual (desviación tÌpica) de 1 m/s
Mac 20X
46
32
3000
1,3/13000
Torch R7
0,5
0,38
4 - - 8
0,2
Automática
4,7
110
dB(A) 113
96,3
2,4
3,6
16/40
16/40
15,5/39
0,375
0,050/1,3
6
19
) según la
WA
2
.
71