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Front wheel brake chamber ALS Mk-3 : air brake system

Front wheel brake chamber ALS Mk-3 : air brake system construction and working

The front wheel brake chamber ALS Mk-3 is a actuator which helps to apply the brake in front wheel only. In the ALS  Mk-3 total four front wheel brake chambers are fitted. Now we learn about construction and working of the front wheel brake chamber ALS Mk-3


front-wheel-brake-chamber-als-mk-3


Construction of the front wheel brake chamber ALS Mk-3 :-

The front wheel brake chamber is basically used to applying the brake into the front wheel. The front wheel brake chamber ALS Mk-3 is operated by the pressurized air.

The front wheel brake chamber ALS Mk-3 are four in numbers and fitted with front wheel, each wheel have two front wheel brake chamber. The front wheel brake chamber have a air inlet only. 

Inside the body there is a rubber diaphragm provided and for gives the strength to the rubber diaphragm there is a aluminum disc is fitted. Another a plunger is also fitted with the diaphragm. This plunger is connected with push rod. 

There is a spring is fitted to keep the diaphragm in initial position. The push rod is connected with the wedge and wedge roller. Wedge roller are always remains touch with the brake shoe piston.


front-wheel-brake-chamber-als-mk-3


Working of the front wheel brake chamber ALS Mk-3 :-

When driver apply the service brake of the vehicle the pressurized air has entered into the front wheel brake chamber apply the pressure on the rubber diaphragm. 

The rubber diaphragm moves forward, because of this the plunger and push rod is also moves forward and the spring has to be closed. 


Front wheel brake chamber ALS Mk-3


For moving forward of the push rod the wedge is also move forward. Because Of forward moving of the wedge the wedge roller expand outside and push the piston and piston is pushed to brake shoe. Finally the brake shoe cought the brake drum and brake will apply into the vehicle.


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