a) Insufficient air pressure
b) Due to brake adjuster not installed into line, adjusting spring and rack might be broken.
c) Unequal drum gaps cause excessive adjustment of the brake adjuster .For this reason brakes of your vehicle is locked
d) Run out of the drum cause excessive adjustment resulting brakes of the vehicle is locked.
e) Excessively worn brake linings cause to damage clutch mechanism of the brake adjuster and the drum.
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Fengqiao lndustrial Area,ZhujiCity,Zhejiang,China | Phone :0086-575-87628536 | Fax :0086-575-87422272