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how to service a vehicle\'s hydraulic system

by:DMS Seals     2019-10-23
The vehicle hydraulic system service is relatively simple, but it is crucial for the safe operation of the vehicle.
Brake fluid check the master cylinder is usually located under the hood, close to the firewall on the driver\'s side.
Remove the cover and check the gasket or diaphragm.
Check the cover for damaged or blocked vents.
Clean the vents if necessary.
Check the brake fluid level of the main cylinder. A cast-
Usually fill the iron reservoir in the range of 1/4 on the top.
A plastic reservoir may have liquid level Mars.
Don\'t fill the reservoir with water.
A leak may occur if liquid must be added, or wear shoes and/or pads.
Check the system carefully and find the leak point.
To check the contaminated liquid, place a small amount of brake fluid in a transparent glass jar.
If the fluid is contaminated or layered, it is contaminated.
Contaminated liquids must be replaced.
Contaminated brake fluid can damage the rubber parts and cause a leak.
When replacing the contaminated brake fluid, a new brake fluid is required to flush and replenish the brake system.
Always use fluid with a point rating of 3 or higher.
Follow the manufacturer\'s advice.
Check around the main cylinder, especially the rear, for moisture and leakage.
Leakage installed on a firewall or power brake indicates a defect in the rear piston seal.
The main cylinder must be rebuilt or replaced.
Brake line check to check for leaks and damage to all pipes, hoses and connections from the hood down to the wheel.
It should also be checked for signs of brake fluid leakage on wheels and tires.
Check all hoses for elasticity, bumps and cracks.
Check if there is damage and wear to the parking brakes, cables and connections.
Replace parts if necessary.
Check the brake pedal multiple times and release the brake pedal (
Engine operation of power brake).
Check for friction and noise.
The pedal movement should be smooth and there is no squeak of the pedal or brake.
The pedal should return quickly after it is released.
When operating the engine, make sure the drive Rod is in neutral or parking condition.
Make sure the area is well ventilated for the exhaust unit to escape.
Apply heavy foot pressure to the brake pedal (
Engine operation of power brake).
Check the sponge pedal and pedal reserve.
The sponge pedal is flexible.
Pedal action should have a sense of trim.
Pedal reserve is the distance between the brake pedal and the floor after the pedal is completely pressed down.
The pedal should not be below 1 or 2 inch above the floor.
After turning off the engine, maintain a slight foot pressure on the pedal for about 15 seconds.
There should be no pedal action during this time.
The pedal movement shows a leak.
Repeat the program using heavy pedal pressure (
Engine operation of power brake).
If there is pedal action, but the liquid level is not low, there is an internal leak in the main cylinder.
Must be rebuilt or replaced.
If the level is low, there will be an external leak somewhere in the braking system.
Leakage must be fixed.
Step on the pedal and check if the stop light is working properly.
To check the power brake operation, step down and release the pedal several times when the engine stops.
This eliminates the vacuum in the system.
Press and hold the brake with moderate foot pressure and start the engine.
If the power unit is running properly, the brake pedal moves down when the engine is started.
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