Chain Brake; Stopping The Engine - Hitachi CS40EM Mode D'emploi

1. H and L needles are restricted within the number of
turn as shown below.
H needle :
L needle :
2. Start the engine and allow it to warm up in low speed
for a few minutes.
3. Turn the idle adjusting screw (T) counterclockwise
so that the saw chain does not turn. If the idling
speed is too slow, turn the screw clockwise.
4. Make a test cut and adjust the H needle for best
cutting power, not for maximum speed.
NOTE
Some models sold areas with strict exhaust emis-
sion regulation do not have high and low speed car-
buretor adjustments. Such adjustments may allow
the engine to be operated outside of their emission
compliance limits. For these models, the only car-
buretor adjustment is idle speed.
For models that equipped with low and high speed
adjustments; carburetors are pre set at the factory
Minor adjustments may optimize performance based
on climate, altitude, etc. Never turn the adjustment
screws in increments greater than 90 degrees, as
engine damage can result from incorrect adjustment
If you are not familiar with type of adjustment-assis-
tance HITACHI dealer.

■ CHAIN BRAKE

This machine is equipped with an automatic brake to
stop saw chain rotation upon occurrence of kickback
during saw cutting. The brake is automatically operated
by inertial force, which acts on the weight fitted inside
the front guard.
This brake can also be operated manually with the front
guard turned down to the guide bar.
To release the brake, pull up the front guard toward the
front handle till a "click" sound is heard.
[Caution]
Be sure to confirm brake operation during daily inspec-
tion.
How to confirm:
1) Turn off the engine.
2) Holding the chain saw horizontally, release your hand
from the front handle, hit the tip of the guide bar to a
stump or a piece of wood, and confirm brake op-
eration. Operating level varies by bar size.
- 1 /
4
- 1 /
4
In case the brake is not effective, ask our dealer for in-
spection and repairs.
If the engine keeps rotating at high speed with the brake
engaged, the clutch will overheat causing trouble.
When the brake engages during operation, immediately
release the throttle lever to stop the engine.

■ STOPPING THE ENGINE

1. Release the throttle lever to allow the engine to idle
for a few minutes.
2. Set the switch to the "O" (STOP) position.
Carburetor anti-freeze mechanism
Operating chain saws in temperatures of 0 – 5°C at times of
high humidity may result in ice forming within the carburetor,
and this in turn may cause the output power of the engine to
be reduced or for the engine to fail to operate smoothly.
This product has accordingly been designed with a ven-
tilation hatch on the right side of the surface of the cylin-
der cover to allow warm air to be supplied to the engine
and to thereby prevent icing from occurring.
Under normal circumstances the product should be
used in the normal operating mode, i.e., in the mode to
which it is set at the time of shipment. However when
the possibility exists that icing may occur, the unit should
be set to operate in the anti-freeze mode before use.
(1) Air cleaner cover
(2) Shutter plate
(3) Screw
WARNING
• Continuing to use the product in the anti-freeze mode
even when temperatures have risen and returned to
normal, may result in the engine failing to start prop-
erly or in the engine failing to operate at its normal
speed, and for this reason you should always be sure
to return the unit to the normal operating mode if
there is no danger of icing occurring.
■ HOW TO SWITCH BETWEEN OPERATING MODES
1. Flip the engine switch to turn off the engine.
2. Remove the air cleaner cover from the cylinder cover
3. Loosen a screw and remove the screen on the back
of the air cleaner cover.
4. Turn the screen a half and reinstall to the cover.
When using the saw with the anti-freeze mode, frequently
check the screen and keep it clean of saw dust.
(4) Normal operating mode
(5) Anti-freeze mode
(6) Screen
GB-11
G
B