| W4-60C Excavator brake pneumatic system, in | | | | springs. If the relief valve spring 18 compressed within |
| between the pump and the reservoir pump equipped | | | | the small tight, thimble 8 is difficult to promote, plug 9 |
| with a gas control valve, its main function is to | | | | axial hole blockage, can make air pressure can not be |
| separate compressed air Petroleum and water, filtered | | | | unloading; second is not yet reached the required |
| compressed air in the red dust and impurities, | | | | pressure to exhaust pressure relief when it started. |
| preventing gas storage bins compressed air back to | | | | First, pressure regulator diaphragm leaks this reason, |
| the pump to ensure the gas pressure stabilized at | | | | the second is due to the small pressure regulating |
| 0.490-0.637MPa within the framework of a maximum | | | | valve spring too loose (or broken), or under pressure in |
| pressure of not more than 0.784MPa. Failures often | | | | the lower thimble can be promoted, so that relief valve |
| occur with the use of the following: | | | | on the shell holes continue to leak gas, causing the |
| Pressure regulating valve damage due to leakage | | | | system pressure does not rise up. In this case the |
| wither laminated sheet | | | | valve should first remove one screw on the first |
| Regulator diaphragm 6 as rubber, to withstand | | | | adjustment or replacement of a small spring, and then |
| pressure due to its frequent repeated stamping, | | | | adjust the big spring. |
| repeated hog, reset action, subject to gas, water | | | | The adjustment of the pressure relief valve is not |
| corrosion, so Guchang diaphragm is damaged, it is | | | | normal |
| most likely to occur in the control valve failure. | | | | The role of safety valve is to ensure that gas storage |
| Damaged diaphragm from the pump to the | | | | cylinder with air pressure of not more than 0.78MPa. If |
| compressed gas through the membrane into the upper | | | | the pressure exceeds 0.78MPa when the pressure |
| relief valve, rather than into the gas storage bins, | | | | relief valve still will make gas storage cylinder with air |
| causing reservoir pump pressure rise can not get on. | | | | pressure continue to rise. This may be safety valve |
| At this point easy to increase the temperature relief | | | | diaphragm 25 leak, valve spring 16 excellent result; |
| valve, brake system pressure gauge showed less | | | | such as air pressure does not meet the requested |
| than atmospheric pressure, pressure regulating valve | | | | relief, because the weak spring is poor, inadequate |
| Office may hear the sound leakage. | | | | preload, the valve 26 and valve seat 27 is not sealed |
| Control valve shell rupture | | | | making. You should adjust or replace the damaged |
| The valve housing from the upper, middle and lower | | | | parts, respectively. |
| three parts, respectively, with screw connection. As | | | | Gas cylinder with gas shutdown after the back |
| the shell is made from aluminum, in the decomposition | | | | Storage bins in order to prevent backflow of gas after |
| or a combination, if the demolition, installation screws | | | | the shutdown, the control valves are equipped with |
| improper methods, easy to make the shell burst. Down | | | | one-way valve 29, if the shutdown of gas after the |
| on the demolition, installation screws, they shall | | | | gas storage bins back to the pump, this failure were |
| sub-diagonal and multiple loose screw or a screw, so | | | | due more to a one-way valve spring 28 elastic is too |
| that the surface of the shell by combined force to | | | | weak or broken lose role, should be adjusted or |
| maintain its population in line, and prevent damage to | | | | replaced this spring. |
| both Shouli Bu. | | | | Excavator working pressure maintained at |
| Filter damaged | | | | 0.490-0.637MPa within the maximum pressure shall not |
| Compressed air filter is mainly used to filter out the | | | | exceed 0.784MPa, an exception occurs when the |
| dust and impurities, to prevent such substances into | | | | pressure should be adjusted to the pressure regulating |
| the excavator's braking system. It consists of filter 30, | | | | valve and safety valve. Making mechanical |
| vacuum pad 32 and a fixed drain plug 33 composed | | | | adjustments, adjust the safety valve should be an |
| of, if prolonged use, maintenance not timely, it easy to | | | | order of the first adjustment as follows: |
| filter wire breakage, vacuum pad damage. Therefore, | | | | 1,screw on the pressure regulating valve to adjust the |
| caution should be maintained in the maintenance, if the | | | | fixed nut screw loose, and then adjust the screw |
| damage shall promptly repair or change. | | | | screwed in the end, so that the lower part of the |
| Pressure Regulating Valve to adjust air pressure is too | | | | exhaust valve can not be opened. |
| high or too low | | | | 2, observe the safety valve when the pressure |
| Normal working hours, if the gas storage barrel | | | | 0.784MPa can exhaust from the exhaust vent. If |
| reached 0.637MPa gas pressure, the pressure | | | | pressure does not increase or decrease to adjust to |
| regulating valve that is the lower pressure relief, so | | | | normal through the pads 23 be adjusted; low air |
| that pressure will not increase gas storage barrel. | | | | pressure, increase gaskets, whereas reduction of |
| When the gas storage cylinder with air pressure below | | | | gaskets, gaskets for each additional 1mm adjustable |
| 0.49MPa, then should not be a pressure relief. The | | | | pressure 0.036MPa. |
| adjustment of this pressure can be changed by | | | | 3,the relief valve adjusting screw out slowly until the |
| adjusting the screw a large spring 19 of the clamping | | | | exhaust valve opens to exhaust date, if the pressure |
| force (tightening the gas increases; screw loose, | | | | at this time just for 0.637MPa was the best. |
| pressure reduction) to achieve, such as the air | | | | 4,continuous excavators under the brake pedal |
| pressure is still not adjusted properly, you can have | | | | repeatedly rub or to put gas pump reservoir at this |
| two situations: a is the atmospheric pressure has been | | | | time should be observed pick-up in pressure (exhaust |
| exceeded but failed to exhaust pressure relief. At this | | | | piston off) is in between the 0.490-0.539MPa, if the |
| point you should consider whether to run the exhaust | | | | pick-up in pressure is less than 0.490MPa, while the |
| piston 12 o'clock blocked, and as a result of the piston | | | | upper row of holes exhaust the same time, this time |
| cylindrical tight O-ring 34, the lower part of the exhaust | | | | should be adjusted to a small spring pressure. |
| piston spring 10 excellent, leaving the normal pressure | | | | 5, repeated adjustments, testing, until the compliance |
| of gas can not push the piston to run, they should | | | | date. |
| wear uniform cut or adjust the outer ring, replacement | | | | |