That's what were trying to find out lmao, r u in Beth carle's class?
The main parts of control valve are actuator, diaphragm casing, bonnet,yoke,stem,seat,travel indicator,positioner
Check the CAD, the diaphragm may be toast. just replace.
What year is your blazer? Most common cause for it to not go into 4x4 is the vacuum actuator. The actuator is run by vacuum from the transfer case. The vacuum compresses the rubber diaphragm which pulls a cable on the front differential to lock it in. The rubber diaphragm is prone to break down and if there are holes or tears in the rubber it will only suck air and not have the amount of vacuum needed to pull the actuator cable. This actuator is commonly mounted under the battery tray. Easy to remove and inspect. 1998 blazer There is a vacuum switch on the transfer case that usually goes bad. I have replaced mine 3 times. Factory lasted until 225,000 miles and had to replace the aftermarket 2x since, one only lasted a year.
It depends on the year of the Buick. Most of the newer Buicks use an electric actuator to change the vent door positions. If that's the case with yours you have a problem with wiring or a faulty actuator or switch. If yours is one of the vacuum controled heater boxes you probably have a leaky vacuum line or diaphragm.
An actuator for what.
it is called the diaphram.
Keeps the engine from stalling when you let off the throttle (as when shifting). The dashpot has a diaphragm inside with a small hole in it. At steady throttle pressure is equal at both sides, but when you let off the falling manifold pressure sucks the diaphragm to one side. This moves an actuator which catchs the throttle and sets it gently on the idle stop.
Actuator speed is determined by:
what actuator?
The diaphragm is not made out of bone, but the diaphragm is a muscle.
The muscle you are referring to is the diaphragm. It also separates the thoracic cavity from the abdominopelvic cavity.