Wacker Neuson BTS 930, Руководство оператора

Страница: 33 / 62

T00823GB
31
Adjusting the carburetor
NOTE: The Power cut has been equipped
with an electronic ignition to limit the
speed. The carburetor also has a fixed jet
which cannot be adjusted.
At the factory the idling speed has been set to
approx. 2.300 1/min., but the running-in process of
a new engine may require slight readjustment of
the idling speed.
For correct adjustment of the idling speed the
following steps must be carried out:
Start the engine and run it until it is warm
(about 3 - 5 minutes).
Readjust the idling speed.
If the cut-off disc is still turning when the engine is
running, unscrew the adjusting screw of the throttle
valve (9) until the cut-off disc is no longer turning. If the
engine stops when running at idle speed, turn the
screw back in slightly.
Now the acceleration from idling speed to maximum
speed must be tested by abruptly operating the throttle
lever. If the acceleration is too slow, the idling speed
jet screw (10) must be loosened slightly (max. 1/8 of a
revolution) and the throttle valve adjusting screw (9)
tightened slightly.
If it is not possible to adjust the engine as
described above, it will be necessary to undertake
a basic adjustment with the engine switched off.
Switch off the engine.
Basic adjustment
Carefully screw the idling speed jet screw (10) to the
right (in a clockwise direction) until it comes to a
noticeable stop.
Now unscrew the adjusting screw approx. 1 1/8 of a
revolution to the left (in an anti-clockwise direction).
Start the engine
The idling speed and the acceleration can be
corrected by turning the idling speed jet screw (10).
Turn in the screw to speed up, and turn out the screw
to speed down the engine.
48
Set the idling speed with a screwdriver (width
of blade: 4 mm).
The screwdriver shown has a molded-on lug to
assist in adjustment.
49
50