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In general, it seems pretty simple: polishing scored cylinders and pistons, replacing worn seals, replacing excessively worn or damaged parts, etc. However, for an ordinary person, the problem I've run into is finding a readily accessible source of parts, as the hydraulic repair industry seems to be a closed fraternity.

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15y ago
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14y ago

A hydraulic jack for a motor vehicle is a method to lift a vehicle that humans cannot lift on their own. It consists of a jack that is used to apply the lifting force, an oil filled base, and a handle to apply force though the oil base to lift the car. What is inside the base besides oil is the valves which allows a large frequent handle motion at one end to squeeze enough oil through the other end to lift the car.

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12y ago

It depends on what you want it for.

If it's for something like brakes or a hydraulic ram, I would just go buy some hydraulic fluid; those things need their fluid a certain way, and it'll be more expensive to make it than buy it.

But if you're doing a demonstration project for school and don't need a specific oil, I would get some cooking oil and dye it red, so you don't have to deal with hazardous materials like hydraulic fluid.

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11y ago

Once pressure is put on the jacks they won't raise or lower one time, the next they are fine, then it will move the slide out portion.

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13y ago

you put your face under the object being lifted then slowly lower the jack onto your face hopefully crushing your skull

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15y ago

you need a Hydraulic jack disassembler.

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Q: How do you make a hydrolic car jack?
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What type of simple machine is a car jack?

Wheel and axle could be the type of simple machines because it has a wheel for it could advance to the front and to the back, and what the axle do is that is making the wheel move and its at the bottom of the toy car or any car


How do you make a sentence with persistent?

Jack succeeded in his attempt to climb the mountain, because he was persistent in his efforts.


How can you use a simple machine to make a job easier?

1. change the size of the force (eg. lots of cranking of car jack to lift car small amount). 2. change the speed 3. change direction of force (simple pulley - force one way, resistance moves in other direction)


How long does it take for carbon monoxide to make you unconscious from an idling car?

If the car is properly sealed up allowing the carbon monoxide to enter the car but not exit, then you should be rendered unconscious within 30 seconds to a minute, two minutes max.


How does a car jack multiply a force?

A car jack is able to multiply force by multiplying the torque. A car jack combines two types of simple machines, a screw and the wheel and axle. For the car jack the wheel handle is very similar to lever handle. When you add force to the lever hand on the car jack that force is transferred to the turning rod. According to simple lever physics the longer the lever arm the more the force is multiplied. So if a lever arm 1ft long, with 1lb of force applied exerts 1ft /lbs of torque, what happens when the lever arm is 2ft? Just by doubling the length of the lever arm to 2ft we now double the force to 2ft/lbs of torque. That torque in the rod is translated to the screws which pull the jack together to lift up the car. The screw also is a simple machine(an inclined planed curved on itself) which multiples the force(torque) from the lever. The more screw grooves per unit of length the more the force is multiplied. So comparing a jack that has 20 screw grooves per every 1ft to one that has 40 screw grovers per every 1ft, the one with 40 grooves would be multiplying the force twice as much. So if the 20 screw groove is multiplying the torque 100times the 40 grooves would be multiplying it 200times. The beauty of a screw as a force multiplier comes in understanding that it is an incline plane curved on itself. Understanding how an incline plane multiples force helps to better understand the screw. Imagine trying to pick up a 100lb box and put it on a 5ft ledge. It would take over 100lbs to over lift it straight up onto the ledge. Now imagine we add a plank that we can slide the weight onto. This plank is 5ft long, we place it on the ground and on the tip of the ledge. The plank will have a slope of 1(rise)/ 1(run), which is one. That is because it rises one foot up for every foot of distance it spans. If we wanted to make our task easier and multiply our force even more we could make the plank even longer, making it 50 feet would give us a slope of 5(rise)/(50)run or 1/10 or 0.1 . This gives us a very long slope and we can exert way less force(though we need to exert it for a longer time) to move the 100lbs. For example if a 10 year old can only exert 25lbs of force, that 25lbs of force may now be enough to move the 100lbs given a 5ft plank providing a slope of 1 rise/1 run. We provide the 50ft plank to assist in the job, the 10 year old is still only exerting 25lbs of force but the longer plank (inclined plane) acts as a force multiplier and may multiply his 25lbs of force by 10 allow him to move the 100 lbs given a long slope. That is the essence of how a car jacks uses a screw and level to multiply force. -WNL