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Hydraulics

Due to its immense power, hydraulics are used for operating various machinery, vehicles, aircraft, ships and equipment. The data and engineering revolving around hydraulics is so vast, its hard to comprehend.

1,856 Questions

Why could you not use a gas in the brake pipes?

Theoretically, you could, but it would have to be highly compressed, and then, the pedal might be too hard to press (without making things complex and too bulky for a regular car). Let's start with some background. Matter takes three forms - solid, liquid, and gas. A solid has a definite volume and shape. A liquid has a definite volume, but can take the shape of its container. A gas has an indefinite volume and shape, meaning you can force nearly any amount into a container - assuming the container is strong enough.

Anyway, a liquid is the best thing to use in brake lines because liquid has a definite volume and responds immediately to any pressure behind it.. A gas would be too "spongy" (compression, motion loss) and not respond fast enough (too much latency). If the line is not pressurized to at least what is needed for braking, the shoes or calipers would not work. But if you have it too strong, the driver could not apply the brakes. So for general use in small passenger vehicles, fluid brakes are the most practical.

In trucks which use air brakes, there are a couple of ways they overcome these problems. They use both regular air brakes and "spring brakes" (for emergencies and perhaps for use during coupling). The two work in opposite ways. The regular airbrakes require air to release. While that can cause difficulties in getting the rig moving on occasion, the braking response is very good. That way, the latency and loss of motion introduced by the air doesn't interfere with braking. However, if there is a leak in the lines, the trailer will cause the rig to lock down, since the brakes are applied by default.

The spring brakes are not as good in braking as the main brakes because of the air latency and motion loss issues due to the nature of air. But that dilemma is reduced because of an air tank under the trailer and a relay valve. The tank addresses the challenges by putting the air source closer to the brakes and reducing the compression in the lines. I think it is a drop in pressure that causes the relay valve to engage (much like how the regular brakes get engaged). If I remember right, if you have no trailer, you have to engage the trailer brake valve to avoid a loss of air from the compressor.

Can you use a water shut off valve for hydraulics?

Only if it has a WOG rating that is with in the design of the system

Do hydraulic systems depend on air pressure?

Not usually. Hydraulic systems use fluids. Pneumatic systems use gas.

What is a servo valve?

A servomechanism, usually shortened to just servo, is a device used to provide mechanical control at a distance. For example, a servo can be used at a remote location to proportionally follow the angular position of a control knob. The connection between the two is not mechanical, but electrical or wireless, for example.

The most common type of servo is that mentioned, which gives positional control. Servos are commonly electrical or partially electronic in nature, using an electric motor as the primary means of creating mechanical force, though other types that use hydraulics, pneumatics or magnetic principles are available. Usually, servos operate on the principle of negative feedback, where the control input is compared to the actual position of the mechanical system as measured by some sort of transducer at the output. Any difference between the actual and wanted values (an "error signal") is amplified and used to drive the system in the direction necessary to reduce or eliminate the error. A whole science of this type of system has been developed, known as control theory.

Servos are found in many applications. They operate the throttle of engines that use a cruise control. CNC machines use servos to make the motion axes of a machine tool follow the desired tool path. Fly-by-wire systems in aircraft use servos to actuate the control surfaces that control the aircraft. Radio-controlled airplanes use servos for the same purpose. Many autofocus cameras also use a servomechanism to accurately move the focus.

Can you add external hydraulic valve to diverter on Ford 4000 tractor?

There might be a way. You can come off the port on top of the diverter for the pressure line, I just don't know where to put the return line. Maybe someone else will know about a return line.

How do you bleed a hydraulic clutch on a 1999 Ford Ranger?

All you have to do is let it gravity bleed.

Just open the bleeder valve on the transmission and have someone watch the fluid level in the resavore.

It might take a few minutes but that's the easiest way that I have found.

Where do you find a hydraulic clutch line for a 1995 ford ranger?

the dealer is the only place to get a line they are rubber high pressure line and can not be cut and put back together..you cant buy them used because salvage yards do no deal in lines and hoses.i know i looked for one for the same 1995 ranger..dealer part $103.00

How do you put hydraulic oil in a bottle jack?

There should be a screw on the side of the jack--remove and fill until oil runs out of this screw. Make sure that the "ram" is fully retracted into the body of the jack

How do you disconnect the hydraulic line from your transmission?

they make a tool for it but where the line goes in trans there is a white band plastic push in band with screw driver all the way around line and pull it should come off

Where is the bleeder plug on a '99 Chevy S-10 hydraulic clutch?

On a 98 Sonoma, it is on the driver's side inside the bell housing. There is a small rubber extension on the end of the bleeder tube, which must be pulled out of the housing to prevent the fluid from draining inside. Good luck, it is not an easy job. You may want to add your own makeshift extension of approx 12" to direct the fluid into a bottle.

How do you get air out of a John Deere 2010 hydraulic system?

Crank tractor set tractor throttle at 1500 rpm turn steering wheel all the way to the right hold it for about 10 seconds then turn it to the left and hold it for about 10 seconds repeat several times and the air should be gone

How is hydraulics used in construction machinery?

Common place uses would be for your JCB and earth movers, the buckets/shovels on them are powered by powerful hydraulic systems.

A less common use for them would be winches, jacks and hydraulic hinges.

What happens if you are low on hydraulic fluid?

If you are running low on hydraulic fluid, it could keep your machine from working properly. If the fluid is extremely low, it could cause permanent damage to the machine.