9347140100 Wabco Four Circuit Protection Valve

Brand:WABCO

Part Number(s): 4640023300 / 464 002 330 0

Top Lead company supplies wabco accessories, Mann brand MANN filter and other original authentic spare parts, The function of the four-loop protection valve is to divide the whole vehicle air brake system into four circuits that are interrelated and independent of each other. When any circuit fails (such as broken or leaked), it does not affect the normal operation and filling of other circuits. 

The Howo trucks's braking system uses four-circuit protection valve, the purpose is to provide reliable safety for vehicle safety. In actual use, the main faults are mainly the following:

(1) A pipe is not ventilated or leak, should check the four-way protection valve, check valve is stuck, or diaphragm rupture. The main cause of these failures is: the airway contains a lot of water, the cavity produces a lot of corrosion, the valve stuck, rusty foreign body off.
(2) The phenomenon of air pressure is relatively rare, because the four-way protection valve standard air pressure has been adjusted before leaving the factory, where all the failure is through maintenance and replacement of internal parts, such as diaphragm, seat, piston assembly Quality and improper adjustment caused by;
After the damage on the way to drive, in order to facilitate the demolition, please the corresponding parts of the location of the mark, decomposition can be divided into four steps: First, remove the protective cover on the bonnet, remove the adjustment screw on the bonnet; Is to remove the cross screw on the valve cover; third is to remove the valve body parts, such as valve cover, adjust the screw seat, the spring, spring seat, diaphragm, valve assembly, the next spring. Fourth, the various parts of the inspection, after cleaning the provisions of the various parts of the lubrication, the assembly should pay special attention to the diaphragm anyway, red face toward the _L. Black side down, when the pressure adjustment to meet the requirements must be installed after the protection Plug

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