Zontes ZT350T-D, Maintenance Manual

Page: 113 / 152

113 / 152
c. Refer to the procedure for replacing the brake pads to
remove the brake pads first.
d. Disassemble the rear disc brake caliper
Refer to the previous steps to disassemble the front disc
brake caliper piston to remove the rear disc brake caliper
piston. Check the piston and caliper cylinder for scratches,
damage, pits, etc. Check whether the pin is deformed. The
points that should be paid attention to during cleaning and
assembly are detailed in the previous description, and will
not be repeated here.
Caution:
●Apply silicone grease to the surface of the pin and bush
indicated by the arrow.
●The oil seal and dust seal should be replaced with new ones
after disassembly. DOT4 brake fluid should be applied to the
oil seal and piston, and silicon grease should be applied to
the outer ring of the dust seal.
●Apply thread fastening glue to the thread of the caliper pin,
torque: 27N.m (2.8kgf.m, 20 lbf.ft).
●The torque of the air release nozzle: 7
～
9N.m (0.7
～
0.9kgf.m, 5
～
7 lbf.ft).
●The open end of the piston should face the caliper
mounting plate, and do not install it backwards.
●If there is slight rust on the surface of the piston, it can be
polished off with 2000 mesh fine sandpaper.
Brake hose and wheel speed sensor
Check the gap between the wheel speed sensor
and the induction ring gear
Caution:
●The vehicle needs to be parked on a stable lifting platform
or on a level and level ground.
Put down the main bracket to park the vehicle firmly and
let the rear wheels hang in the air.
Use a feeler gauge to check whether the gap between the
wheel speed sensor and the ABS induction ring gear is 0.4-
1.2mm (0.02-0.05in).
If the gap is not within the specified range, check whether
the wheel speed sensor is damaged and whether the ABS
induction ring gear is loose. The front wheel needs to check
whether the position of the sensor installed on the front disc
brake caliper mounting plate is deformed, and the rear wheel
is to check whether the mounting position on the rear rocker
arm is deformed and whether the rear wheel nut is loose.
Front wheel
Rear wheel
Remove the brake hose and wheel speed sensor
Caution:
●Check whether the brake hose is normal according to the
maintenance table.
●Before disassembling the brake hose, drain the brake fluid
before operation.
●Before removing the hose, remove the upper cover of the
front and rear disc brake main pump, loosen the disc brake
oil pipe bolts from the front and rear disc brake calipers to
drain the brake fluid.
●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.
Release brake fluid
a. Refer to the previous steps to remove the oil pan first,
place the oil pan at the front and rear calipers, remove the
disc brake oil pipe bolts and copper pads first, and drain the
brake fluid into the oil pan, and then refer to the front and
rear disc brake main pumps. Add brake fluid step to remove
the upper cover of the main pump to accelerate the
discharge of brake fluid. Remove the disc brake oil pipe bolts
and copper pads at the main pumps of the front and rear disc
brakes. Only the disassembly steps of the brake hose are
explained here.
b. Press the buckle indicated by the arrow, turn the plug
push rod in the direction indicated by the arrow, and pull out
the plug. In order to prevent the remaining brake fluid from
entering the plug when the hose is removed in the next step,
the plug of the hydraulic control unit can be wrapped with an
oil-resistant film plastic bag.
FMC-HU: Front disc brake main pump-hydraulic control unit
FC-HU: Front disc brake caliper-hydraulic control unit
RMC-HU: Rear disc brake main pump-hydraulic control unit
RC-HU: Rear disc brake caliper-hydraulic control unit