Zontes ZT350T-D, Руководство по обслуживанию

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b. Place the small container under the high-pressure oil
pipe, press the buckle indicated by③ and pull out the high-
pressure oil pipe
⑴
in the direction of the arrow at the same
time. A small amount of fuel will flow out when it is pulled
out, and it is forbidden to drip onto the surface of the part.
c. Find the circlip at the bottom of the valve body (2) pinch
both ends of the circlip with your hands and move it out, and
then pull out the desorption tube (3).
d. Loosen the bolt of the clamp
⑷
with a 4# inner hexagon
and pull out the air filter outlet pipe
⑸
and clamp
⑷
in the
direction of the arrow to pull out the throttle valve body.
e. Use 5# inner hexagon to remove 2 bolts
⑹
and then
remove the valve body assembly from the engine.
f. Remove the heat insulation pad and O-ring assembly,
and remove the O-ring
⑽
. Use a 4# inner hexagon to loosen
the clamp
⑼
and separate the intake manifold from the
valve body assembly. Use 2 10# open-end wrenches to
loosen the two nuts of the fuel line
⑻
and then pull them out
to remove them from the bracket; take out the cylinder end
of the throttle line from the turntable. After the two nuts of
the oil return line
⑺
are loosened, completely loosen the nut
at the bottom of the threaded sleeve, and then pull out the
bracket in the direction of the axis.
g. Use throttle valve body cleaning agent to clean the
carbon deposits on the intake manifold and throttle valve
body outlet respectively. It is forbidden to directly soak the
throttle valve body assembly and intake manifold assembly
with any liquid.
h. After cleaning the heat insulation pad, replace 2 new O-
rings
⑽
and assemble them in place. Wipe clean the contact
surface of the intake manifold and the heat insulation pad
and the end surface of the heat insulation pad and the
engine. Reversely reset all materials in the order of
disassembly.
4. Disassemble the sensor
a. If the idling speed is abnormal, it is easy to extinguish
and the spark plug and high voltage coil are eliminated, the
sensor needs to be removed for investigation. It should not
be disassembled under normal circumstances.
b. Refer to the steps for removing carbon deposits
without disassembling the throttle valve body, and unplug
the plugs of the stepping motor① and the sensor②.
Remove the stepper motor. After turning off the power, take
out the stepping motor, do not loosen the cable plug, press
the flameout switch at startup without ignition, check
whether the motor plug can shrink back and forth, and finally
turn off the flameout switch to check whether the plug
returns to its original position.
If you need to check whether the stepper motor is
abnormal, measure whether the resistance across A and B is
53±5.3Ω. Bolts for fixing stepper motors: GB9074.4 M4×12.