Zontes ZT310T-M, Руководство по обслуживанию

Страница: 132 / 184

132
/
184
7.3 Disassembly
Checking method of thermostat assembly:
Seal the two ports, pass in compressed air of 181 kPa (1.85 Kgf/cm2, 26.3 psi) from the other port, put it in the
water and let it stand to see if there are bubbles, if there is leakage.
1-M6×10 bolt*2 2-M6×12 bolt 3- φ5.6×φ1O ring 4 -thermostat upper shell 5-thermostat core 6-thermostat lower shell
7.4 Thermostat core inspection
Check the opening temperature, full opening temperature and lift of the main valve in the
thermostatic heating equipment with adjustable temperature. If one of them does not meet the
specified value, it should be replaced. Or use a thermometer, water, heater, and container to
test.
The initial opening temperature of the thermostat is 80
～
84
℃
(176
～
183 F), and the core
moving 0.1mm (0.004 in) can be regarded as the initial opening. The full opening temperature
is 95°C (203 F), and the core movement is greater than 3.5mm (0.14 in).
The simple test method is to put the core body into a high temperature resistant container, pour it into boiling water
and soak for a period of time, take out the core body with pliers, and observe whether the valve can be fully opened.
Until all closed.
The joint surface should be cleaned before rematching, and no O-ring should be installed.
8. Water pipe
Check whether there are cracks, bulges and other defects on the surface of each water pipe. Block one end of the
water pipe, ventilate the other end and put the water pipe into the
nozzle to check if there is any air bubbles, if any, replace it.
9. Check the water pump cover assembly
Check the two points indicated by the arrows for leakage. The
bolts are for cooling liquid bolts. If there is leakage, remove the
bolts and replace the O-ring. If there is leakage at the leaking pipe
of the right crankcase cover, you can try to remove the leaking
pipe (because the sealant is applied before press-fitting, it is
difficult to pull out), clean it up, reapply the sealant and reinstall it;
or directly replace the right crankshaft Box cover assembly.
A small amount of coolant leaking from the leaking pipe is normal. If the engine is running continuously, it is
abnormal. The water pump cover needs to be disassembled to check whether the seal has failed.