Cutting Methods; Chain Brake; Important Points; Tree Felling Techniques - Husqvarna 137, 142 Instruction Manual

CHAIN BRAKE

WARNING:
If the brake band is
worn too thin it may break when the chain
brake is triggered. With a broken brake band,
the chain brake will not stop the chain. The
chain brake should be replaced by an autho-
rized service dealer if any part is worn to less
than 0,5 mm thick. Repairs on a chain brake
should be made by an authorized service
dealer. Take your unit to the place of pur-
chase if purchased from a servicing dealer,
or to the nearest authorized master service
dealer.
S This saw is equipped with a chain brake.
The brake is designed to stop the chain if
kickback occurs.
S The inertia- -activated chain brake is
activated if the front hand guard is pushed
forward, either manually (by hand) or
automatically (by sudden movement).
S If the brake is already activated, it is
disengaged by pulling the front hand guard
back toward the front handle as far as
possible.
S When cutting with the saw, the chain brake
must be disengaged.
Disengaged

IMPORTANT POINTS

S Check chain tension before first use and af-
ter 1 minute of operation. See CHAIN TEN-
SION in the ASSEMBLY section.
S Cut wood only. Do not cut metal, plastics,
masonry, non-wood building materials, etc.
S Stop the saw if the chain strikes a foreign ob-
ject. Inspect the saw and repair or replace
parts as necessary.
S Keep the chain out of dirt and sand. Even a
small amount of dirt will quickly dull a chain
and thus increase the possibility of kickback.
S Practice cutting a few small logs using the
following techniques to get the "feel" of using
your saw before you begin a major sawing
operation.
S Squeeze the throttle trigger and allow the
engine to reach full speed before cutting.
S Begin cutting with the saw frame against
the log.
S Keep the engine at full speed the entire
time you are cutting.
S Allow the chain to cut for you. Exert only
light downward pressure. If you force the
cut, damage to the bar, chain, or engine
can result.
S Release the throttle trigger as soon as the
cut is completed, allowing the engine to
idle. If you run the saw at full throttle with-
out a cutting load, unnecessary wear can
Braking function control
CAUTION:
checked several times daily. The engine
must be running when performing this proce-
dure. This is the only instance when the saw
should be placed on the ground with the en-
gine running.
Place the saw on firm ground. Grip the rear
handle with your right hand and the front han-
dle with your left hand. Apply full throttle by
fully depressing the throttle trigger. Activate
the chain brake by turning your left wrist
against the hand guard without releasing
your grip around the front handle. The chain
should stop immediately.
Inertia activating function control
WARNING:
following procedure, the engine must be
turned off.
Grip the rear handle with your right hand and
the front handle with your left hand. Hold the
chain saw approximately 14" (35 cm) above
a stump or other wooden surface. Release
your grip on the front handle and use the
weight of the saw to let the top of the guide
bar fall forward and contact the stump.
When the tip of the bar hits the stump, the
brake should activate.
Engaged

CUTTING METHODS

occur to the chain, bar, and engine.
S To avoid losing control when cut is com-
plete, do not put pressure on saw at end
of cut.
S Stop the engine before setting the saw down
after cutting.

TREE FELLING TECHNIQUES

WARNING:
dead branches which can fall while cutting
causing serious injury. Do not cut near build-
ings or electrical wires if you do not know the
direction of tree fall, nor cut at night since you
will not be ale to see well, nor during bad
weather such as rain, snow, or strong winds,
etc. If the tree makes contact with any utility
line, the utility company should be notified im-
mediately.
S Carefully plan your sawing operation in ad-
vance.
S Clear the work area. You need a clear area
all around the tree so you can have secure
footing.
S The chain saw operator should keep on
the uphill side of the terrain as the tree is
likely to roll or slide downhill after it is felled.
S Study the natural conditions that can cause
the tree to fall in a particular direction.
9
The chain brake must be
When performing the
Check for broken or