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Q: Primary master cylinder pistons are activated by?
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What does the compensating port do in the brake cylinder?

the master cylinder is designed so that when the brakes are applied, the pistons (primary and secondary) closes the compensating port and opens intake port. this allows brake pressure to be formed in brake system to apply brakes and allows brake fluid to fill behind pistons (through intake ports) when you release the brakes, the primary and secondary piston springs push their pistons (inside the master cylinder) to its rest position, faster than fluid can fill the chambers. this causes the brake fluid to flow past the piston cups (this happens when the rubber cup flexes foward) as the pistons pass the compensating port, brake fluid is allowed to return to the master cylinder reservoir. the intake and compensating ports act as a breather for the master cylinder. hope this answers your queston :)


How do you replace a cylinder on a Chevy S10?

This is a far reaching question that needs more clarification. There are cylinders where the pistons are located. If you have a clutch then you have a clutch master and slave cylinder. On the brakes you have a master cylinder and wheel cylinders. And the beat goes on. You need to distinguish as to which cylinder you are referring.


What port is primary on a Chevy truck master cylinder?

The bigger one for your discs.


Technician A says that the master cylinder primary cup seals pressure on brake application Technician B says that the master cylinder primary cup allows fluid flow during brake release Who is correc?

B only


Does a clutch master cylinder get gummed up?

Just disassembled the master cylinder on my Mazda B2000. It had rusty looking gunk in it and had formed rusty brown deposits on the cylinder wall. It was working in spite of this until the rubber of the primary cup split. Rebuilt the slave cylinder not long ago and it was gunked up worse than the master cylinder. Had to remove some crusty deposits to get the piston and cups out of the cylinder.


After changing pads and master-cylinder front brakes are trying to lockup on a 1988 Surburban 4x4 What should be done next?

Check the calipers. If the calipers pistons are extended to far - this could cause the brakes to lock up. The pistons cannot be retracted.


What does a wheel cylinder do?

Operates the brakes when the pedal is pressed. The pedal pushes the master cylinder, this pushes brake fluid down the brake lines, the fluid pushes the piston(s) in the wheel cylinder, the pistons push the pads or shoes onto the drum or rotor which is attached to the wheel.


What is the difference between a master cylinder and slave cylinder?

The primary difference between a master and a slave cylinder is which one make the other one work. We operate the master cylinder to make the slave cylinder work. The master cylinder on a hydraulic clutch is actuated by pushing on the clutch pedal. The hydraulic pressure then makes the clutch slave cylinder move and it pushes out to give the throw-out arm a shove. This will disengage the clutch from the flywheel (by actuating the pressure plate). the master cylinder is on the fire wall its the main one, when you push on the brake pedal down it pushes on a rod in the master sylinder. the wheel cylinders (slave) are on the dram drums. they push the brake shoes to the drum


How do you bleed the clutch line on a 1999 ford f250 with no bleed screw on either cylinder?

I have the same Problem, AFTER EXAMINING MY OLD MASTER CYLINDER TO ESTABLISH THAT THIS WILL NOT OBSTRUCT THE STROKE OF THE PISTONS INSIDE THE CYLINDER. I HAVE DECIDED I WILL DRILL A LITTLE HOLE IN THE PLASTIC BARREL OF THE NEW REPLACEMENT MASTER CYLINDER. AFTER BLEEDING FOR SAFTEY SAKE. I WILL PUT AN ALLEN SCREW IN THE HOLE AND PERHAPS USE A HOSE CLIP OVER THE SCREW AND AROUND THE PLASTIC BARREL OF THE CYLINDER.


What all does the heaters master cylinder control in a car?

a heater does not have a master cylinder; 'master cylinder' goes with assisted braking.


Two types of master cylinder design?

there are two types of master cylinders 1.single cylinder 2.tendom master cylinder


What does the red exclamation mark with a circle around it mean on the dash when it lights up on a 1991 Lancer?

hand or park brake switch is still activated or low fluid in master cylinder