Checking The Chain Brake - Makita DCS34 Instruction Manual

Checking the chain brake

Do not work with the chain saw without first checking the
chain brake!
Start the engine as described (make sure you have a good
footing, and place the chain saw on the ground in such a way
that the guide bar is free of contact).
Grasp the tubular handle firmly with one hand and hold the grip
with the other.
With the engine running at moderate speed, press the hand
guard (7) in the direction of the arrow with the back of your
hand until the chain brake engages. The chain should stop
immediately.
Immediately release the throttle and release the chain brake.
IMPORTANT: If the chain does not stop immediately when
you test the chain brake, do NOT use the chain saw. Take
the chain saw to a MAKITA service center.
Adjusting the carburetor
IMPORTANT: Carburetor adjustment may be done only by
a MAKITA service centre!
SERVICE
Do not undertake adjustments to the adjusting screws (H)
and (L) without a tachometer! Improper adjustment can
lead to engine damage!
The adjusting screws (H) and (L) are factory set almost all the
way out (turned counterclockwise).
A tachometer is necessary to adjust the adjusting screws
(H) and (L), because exceeding the permissible maximum
speed leads to overheating and under-lubrication. This can
damage the engine!
The only user-adjustable setting is the idle adjusting screw
(9). If the blade rotates in idle (without the throttle pressed),
it is absolutely necessary to correct the idle speed before
using the tool!
Do not adjust the idle speed until the machine has been
completely assembled and checked!
Adjust the idle speed only with the engine warm, a clean
air filter, and properly installed cutting tool.
Use a screwdriver (blade width 4 mm, part No. 944 340 00)
to adjust the screw.
Setting the idle speed
Turn out the idle adjusting screw (9) (counterclockwise):
Idle speed drops.
Turn in the idle adjusting screw (9) (clockwise): Idle
speed goes up.
Caution: If after this adjustment the cutting tool still
rotates during idle, do NOT work with the unit! Take it
to a MAKITA service centre!
Note: Carburetor adjustment is necessary for optimum
engine performance, for safer and more economical
operation.
In order to comply with new emissions legislation, limits
have been placed on the carburetor adjusting screws (H)
and (L). This limitation (to about 80 degrees) prevents an
excessively rich mixture. On some models the (H) screw is
also sealed. This ensures compliance with emissions rules
as well as optimum engine performance and economical
fuel consumption.
9
7
C
H L
S
D
7