TAYO Zontes ZT125-M 2022, Maintenance Manual

Page: 52 / 188

52 / 188
b. Place the small container under the high-pressure oil
pipe, press the buckle indicated by ③ 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 ⑹ 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 three-in-one sensor
a. If the idling speed is abnormal, it is easy to extinguish
and the spark plug and high voltage coil are eliminated, the
three-in-one 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 motor ① and the CTS three-in-one
sensor ② . 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.
To check whether the stepper motor is abnormal, measure
whether the resistance at both ends of A and B is 53±5.3Ω.
Bolts for fixing the stepper motor: GB9074.4 M4×12.
c. Use a short Phillips screwdriver to remove the 2
GB9074.4 M4×16 bolts ③ that comes with the throttle valve
body assembly, and then remove the the anti- off card④,
and then take off the stepper motor. It is forbidden to soak
the sensor with any liquid.