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What is the main function of a hold off diaphragm on air brakes?
Wiki User
∙ 10y ago
The hold off diaphragm on an air brake system is at the bottom of the maxi-spring within the hold off chamber of spring brakes. Air from the system pushes against the hold off diaphragm and prevents spring pressure being applied to the push rod until the air supply is released.
Wiki User
∙ 12y ago
Wiki User
∙ 10y agoHolds air pressure in the emergency chamber in order to allow the spring brakes to remain released.
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