Husqvarna 137 Instruction Manual page 6

• Front Hand Guard, designed to reduce the
chance of your left hand contacting the chain
if your hand slips off the front handlebar.
• 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.
CHAIN BRAKE AND CKA ANGLE
• Chain Brake, designed to stop the chain in
the event of kickback.
_i_WARNING:
WE DO NOT REP-
RESENT AND YOU SHOULD NOT AS-
SUME THAT THE CHAIN BRAKE WILL
PROTECT YOU IN THE EVENT OF A
KICKBACK. Kickback is a lightning fast ac-
tion which throws the bar and rotating chain
back and up toward the operator. Kickback
can be caused by allowing contact of the bar
tip in the danger zone with any hard object.
Kickback can also be caused by pinching the
saw chain along the top of the guide bar. This
action may push the guide bar rapidly back
toward the operator. Either of these events
may cause you to lose control of the saw
which could result in serious injury or even
death. DO NOT RELY UPON ANY OF THE
DEVICES BUILT INTO YOUR SAW. YOU
SHOULD USE TH E SAW PROPERLY AND
CAREFULLY TO AVOID KICKBACK. Re-
duced-kickback guide bars and low-kick-
back saw chains reduce the chance and
magnitude of kickback and are recom-
mended. Your saw has a low kickback chain
and bar as original equipment. Repairs on a
chain brake shoutd be made by an autho-
rized servicing dealer. Take your unit to the
Computed kickback angle (CKA) Table
BAR
place of purchase if purchased from a ser-
vicing dealer, or to the nearest authorized
Husqvarna® service dealer.
• Tip contact in some cases may cause a light-
ning fast reverse REACTION, kicking the
guide bar up and back toward the operator.
• Pinching the saw chain along the top of the
guide bar may push the guide bar rapidly
back toward the operator.
• Either of these reactions may cause you to
_ose contro_ of the saw which could result
in serious injury. Do not rely upon the safe-
ty devices built into your saw.
_, WARNING:
Computed kickback
angle (CKA) listed on your saw and listed in the
CKA table below represents angle of kickback
your bar and chain combinations will have
when tested in accordance with CSA (Cana-
dian Standards Association) and ANSI stan-
dards. When purchasing replacement bar and
chain, considerations should be given to the
lower CKA values, Lower CKA values repre-
sent safer angles to the user, higher values in-
dicate more angle and higher kick energies.
Computed angles represented indicate total
energy and angle associated without activation
of the chain brake during kickback, Activated
angle represents chain stopping time relative to
activation angle of chain break and resulting
kick angle of saw, in all cases lower CKA val-
ues represent a safer operating environment
for the user.
The following guide bar and chain combina-
tions meet kickback requirements of CSA
Standards Z62,1, Z62,3, & ANSI B175.1
when used on saws listed in this manual.
Use of bar and chain combinations other
than those listed is not recommended and
may not meet the CKA requirements per
standard.
CKA WITHOUT
MODEL
137
142
137
142
137
142
137
142
142
Type Length CHAIN TYPE
0.050 GA 14" 91VG- 52
0.050 GA 14" 91VG- 52
0.043 GA 14" 90SG- 52
0.043 GA 14" 90SG- 52
0.050 GA 16" 91VG- 56
0.050 GA 16" 91VG- 56
0.043 GA 16" 90SG- 56
0.043 GA 16" 90SG- 56
0.050 GA 18" 91VG- 62
CHAIN BRAKE
25"
25"
25"
25"
25"
25"
25"
25"
25"
NOTE: If this saw is to be used for commer-
cial logging, a chain brake is required and
shall not be removed or otherwise disabled
to compty with Federat OSHA Regulations
for Commercial Logging. Contact your au-
thorized Husqvarna service dealer.
SAFETY NOTICE: Exposure to vibrations
through prolonged use of gasoline powered
hand tools could cause blood vessel or nerve
damage in the fingers, hands, and joints of
people prone to circulation disorders or
abnormal swellings. Prolonged use in cold
weather has been linked to blood vessel
damage in otherwise healthy people. If
symptoms occur such as numbness, pain,
loss of strength, change in skin color or texture,
or loss of feeling in the fingers, hands, or joints,
discontinue the use of this tool and seek