TAYO Zontes ZT125-M 2022, Maintenance Manual

Page: 80 / 188

80 / 188
e. Use the brake fluid water content tester to measure the
water content, if it is more than 2%, all brake fluid needs to
be replaced; if it is less than or equal to 2%, add newly
opened DOT 4 brake fluid to the transparent observation
window of the front disc brake main pump 3/4 places. It is
recommended that the water content should be less than
1.5%. Total 0.23L
（
0.24 US qt,0.2 lmp qt,0.06 US gal ,0.05
lmp gal
）
TOTAL HBF 4 (DOT 4) brake fluid is added to this
vehicle from the factory.
The above picture shows the brake fluid water content
tester. The picture comes from the Internet and the
copyright belongs to the author of the original picture. Do
not use it for other purposes.
f. Reassembly can only be done after the foreign objects
have been cleaned up.
2. Replace the brake fluid
Refer to the steps of adding brake fluid. If the measured
water content is greater than 2%, the brake fluid needs to be
replaced. M310 this inspection should be done every 5000
kilometers (3107 mile) or every 15 months. M125 this
inspection should be done every 4000 kilometers (3107 mile)
or every 15 months. It is recommended to replace the brake
fluid every 2 years. If the brake fluid is not replaced for a long
time, flocs will form to block the oil pipe, the oil hole of the
main pump of the disc brake or the piston will become stuck,
which will cause the braking effect to deteriorate or fail,
which will affect driving safety.
2.1 Replace the front brake brake fluid
a. Wrap around the front brake main pump with oil-
resistant plastic film, as shown in the previous section.
b. Pull out the rubber cap of the vent nozzle ① , and put on
8# torx wrench. Use a 6mm (0.23 in) hose to fit the vent ② ,
being careful not to remove the torx wrench.
c. Put the other end of the hose into the oil pot.
d. Remove the upper cover of the front brake main pump
referring to the previous step of adding brake fluid.
e. Rotate the 8# torx wrench with the right hand
counterclockwise to loosen the air nozzle, and with the left
hand, slowly and uniformly squeeze the front brake handle to
the end and keep it still. Lock the vent nozzle clockwise and
slowly loosen the handle. Pay close attention to the liquid
level of the front brake main pump. When it is too low, add it
in time to prevent air bubbles from entering the brake hose.
Repeat the previous steps until the transparent and clean
light yellow brake fluid comes out.
f. Observe whether the liquid level of the main pump is at
3/4 of the transparent inspection, if it is not necessary to add
or withdraw or discharge with a syringe.
g. After the brake fluid is replaced, unplug the 6mm (0.23
in) hose; use a torque wrench to tighten the bleed nozzle to
the standard torque: 10N.m (1 kgf.m, 7 lbf.ft). Then put the
rubber cap on the air nozzle.
h. Reinstall the upper cover of the main pump.
i. Repeatedly pinch and hold the brake handle to check
whether the brake returns to normal hydraulic resistance.
●The discharged brake fluid needs to be properly disposed
of, and it is forbidden to continue to use it. It is forbidden to
dump at will to pollute the environment; or put it at will, etc.
It should be handed over to a qualified recycling unit for
proper disposal.
●The steps of discharging brake fluid must be st rictly
performed without confusion; avoid air bubbles from
entering the brake pipeline.
●When pinching the brake handle, it must be slow and
uniform to avoid air bubbles from entering the brake
pipeline.
●The vent nozzle must be locked in place before the brake
handle can be released. Half-locking is forbidden; and do not
use excessive force.
2.2 Replace the rear brake fluid
Refer to the steps for replacing the front brake brake fluid to
replace the rear one.