Webco Dual Brake valve assembling video

A dual brake valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear and front wheels of a heavy truck or semi-trailer in a tractor-trailer combination. Dual brake valve is necessary in heavy trucks in order to speed-up rear and front brake release, since air takes longer to travel to the rear of the vehicle than the front of the vehicle, where the front service brakes, dual brake valve, parking-control valve, and trailer-supply valve are located.
Without relay valves, it would take too long for sufficient air to travel from the brake pedal dual circuit valve to the rear of the truck or trailer in order to apply the rear service brakes concurrently with the front service brakes, resulting in a condition known as brake lag. To correct this condition on a long-wheel-base vehicle, a relay valve is installed near the rear service brake chambers and dual brake valve is located near steering gear box just down of Driver. In tractors as well as straight-trucks, a remote air-supply is provided in the form of a large diameter pipe connected between the primary reservoir and the relay valve for remote service brake application.
In a truck’s air brake system, relay valves get a signal when a driver presses the treadle, which then opens the valve and allows air to enter the brake chamber via air inlet. The diaphragm gets pushed, then the rod, then the slack adjuster which twists to turn the brake camshaft. Next, it moves the disc, wedge or s-cam, which pushes the brake shoes and lining, creating friction. This friction slows and eventually stops the brake drum’s turning, which stops the wheel.

[@JavedIqbal-od7rx]

nice video

[@abdulmatlub9425]

Aplog port no nahi bataya 21 11 aur 22 12 kaun supply aur kaun dilivary hai

[@mdguljarshaikh4588]

Aap ki video bhut acchi hai sir

[@abdulgafar808]

हेंड ब्रेक रिपेयरिंग की विडियो बनाये।

[@mohammadfaruq8818]

Sir ji is main air pressure sensor aur brake switch ka work thoda aur clear batao

[@rrrrrrrrrrrrrrrrr769]

Video kafi accha banate h ap sari details k sath

[@sorasukre635]

Yardhrya. Ka vidio Pura bnao

[@kashyaptrucksaftyinformati8621]

Good information usdaj ji

[@mdguljarshaikh4588]

Very very nice video sir ji

[@mdguljarshaikh4588]

Sir aur video bnao na

[@navjotsingh5772]

Sir kit change karne per exhaust se leak ho rah hai

[@machinepointDevakoyri]

Kit sahi se nahi set hua hai

[@MuhammadFarooq-so8ko]

Sir is knorr bermse kit ki price kya ha

[@machinepointDevakoyri]

1k

[@nikamganesh8499]

Sir brack hard ho raha hai ky kare

[@machinepointDevakoyri]

Hard to hota nahi hai.

[@parthibankparthi6200]

Piston me grease use Kiya hai app but holes block nahi hoga kiya

[@machinepointDevakoyri]

Nahi air pressure se wo nikal jata hai

[@parthibankparthi6200]

Thanks sir Me ekk vehicle mech

[@rohidaspatil3779]

Very good information & experience sir ji👍

[@DheerajKumar-gc4rx]

Very nice amazing video

[@ganjaneyuluyadav3956]

Super experience

[@jatinkumar-xs6ky]

Kit number kiya he

[@dabgarvijay4939]

Thank you sir

[@MuhammadFarooq-so8ko]

Sir is kit ke price kya ha

[@bpbp2547]

Nice fitting and video

[@MuhammadFarooq-so8ko]

Kit local hai ya branded air price kya ha

[@machinepointDevakoyri]

Knorr bremse ki kit

[@jaichaudhary7231]

Very good video

[@machinepointDevakoyri]

Thanks