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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

How would you know if air is present in a hydraulic clutch linkage?

hydraulics work because fluids are considered a non-compressible material.

therefore when you put your foot down on the clutch pedal it pushes the hydraulic fluid pressure through the line to disengage the clutch.

if there is air in the line the air bubble will compress (gases ARE compressible) and you will feel a "spongy pedal" and you will have to "pump" the clutch pedal to move that air bubble down the hydraulic line before you get a "good" clutch

How does hydraulic steering work?

Firstly you need reservoir for hydraulic oil from there goes one line to inlet port of hydraulic pump (which is driven by a engine or electric motor) then the high pressure port from hydraulic pump goes to hydraulic steering orbitrol, which is connected by a shaft to a steering wheel and has usually 4 ports. One port is connected to a pressure port from hydraulic pump (high pressure). Second port is return line to a reservoir (lower pressure). The other two ports are lines that goes to a hydraulic steering cylinder (which delivers the turning force to steering wheels).

Operation:

When the hydraulic pump is running and has pressure on outlet port the hydraulic oil flows through hydraulic steering orbitrol and back to reservoir. And when you apply turns to a steering wheel the hydraulic steering orbitrol redirects specific amount of hydraulic pressure to a hydraulic steering cylinder and there you have a turning force.

-_- max

What is a hydraulic jack made of?

Hydraulic jacks are always made of steel. No other material would be able to take such internal pressure

Where can I locate an Allis-Chalmers WD-45 hydraulic pump?

Try your local AGCO or Massey Ferguson dealership. Go to (the related link at the bottom)

and fill in the required information. A screen should come up with a liat of dealers. Any of them should be able to get you any Allis-Chalmers parts you need.

How do you change the hydraulic lines of the VW cabrio convertible top?

I replaced two leaking lines. I bought high pressure 1/8" ID hose online (several sites have it). Each line is individually removable. At the pump end, each pair of lines is held in the pump body by a star-head screw. Remove the screw and just pull out the fitting.

End fittings can be re-used by carefully cutting around the crimped area about 1/8" from the end and grinding it flat. It will pull off, exposing the hose underneath. Carefuliy, without damaging the barbs, cut the old hose off. Push the barb into the new hose. If you can find small hose clamps (not the type with a worm screw, but one with a nut & bolt which applies a clamping force evenly over the whole circumference) use these to secure the end. If not, you can use 18 ga. steel wire, wrapped twice around the hose and twisted like a twist tie. Put three or four of these twist wires around the new hose over the barb area.

Careful with the little O rings in the fittings while doing all this. Total cost to replace all lines is about $30 + 3 hours work.

Good luck!

What is a centrifical pump?

A centrifugal pump is one that is used to transport the fluids throughout a vehicle. It uses this pump to get the fuel to the areas it needs to go.

How are hydraulics used for hydraulic drills?

The vertical hydraulic cylinder can be created for the drill.

How many pounds of hydraulic oil per gallon?

7.414 pounds/gallon.

Generally hydraulic oil is given as 0.89 gm/cc and 1 gm/cc = 8.33 lbs/gal.

Where do hydraulic fluid go in a Massey Ferguson gc2310?

Standing behind the tractor look below the seat and just below the bodywork and there is a small (1") removable cap with a tube leading downward.

What weight Hydraulic oil for 773 bobcat skid steer?

The best thing to use is the Bobcat "orange" Hydraulic fluid. Actually you dont use hydraulic fluid in a skid loader you need to use hydrostatic transmission fluid. Drive relief pressures are in excess of 5000 psi, the fluid needs to drive the machine as well as make the lift arm raise up and down. If you cant get the Bobcat stuff than use 10w30 or better MOTOR OIL. Dumping ISO 46 or AW32 can be a very costly mistake.

The convertible top goes down on a 2005 Chrysler sebring but wont raise back up is the top motor or hydraulics problem?

I had the same problem with my '03 Sebring. For me, it was a bad motor; however, a simple leak in the system will cause the same problem. Removing the interior of the car to look for leaks and/or expose the motor for replacement is fairly easy.

Here are the steps for replacing the motor, best as I can remember them:

  1. Lower the top for easier access
    1. Seat is held in place by two clips at the leading edge of the seat. Insert a pry bar next to each location and gently pry up.
  2. Remove back seat bottom
    1. Once the seat bottom is removed, 4 nuts at the bottom are exposed. Remove the 2 inner nuts.
    2. Lift up from the bottom; the seat back will unhook from the three clips at the top. Slide the seatbelts behind the seat back and remove the seat back.
  3. Remove seat back
  4. The insulation behind the seat back is held in place by a few clips. Pop them loose and fold the insulation down to expose the motor.
    1. Gently pry off the speaker grill
    2. Remove the 2 screws next to the speaker holding the panel to the car frame.
    3. There is a felt pad on the top of the panel held in place by 2 screws. Only one of the screws holds the panel to the car's frame, the other just holds on the felt pad.
    4. Gently pry the panel away from the frame. It is held in place by 2 white pin/socket assemblies at the leading edge of the panel. If the pin(s) comes loose from the socket (probably will) then it will be left in the car frame. Gently remove it for later assembly, and slide it back into the socket.
    5. The interior panel has a small metal bar that slides under the rocker panel trim, and can be slid out once the panel is loose.
    6. Disconnect the speaker wires
  5. Remove the side interior panel (x2)
    1. Without disconnecting the hydraulic lines, unbolt the piston's bottom bracket holding the piston to the frame.
    2. Manually pull the top about halfway up to expose the piston's top connecting bolt, and disconnect.
    3. If necessary, replace the pistons with new ones now.
  6. Remove the hydraulic pistons.
    1. The motor is held in place by four rubber grommets, and just pops out.
    2. Carefully remove the rubber fill plug to release pressure in the system. Watch out for oil spraying / leaking out.
    3. The wiring connector is held to the frame by a push-in plastic mounting connector. Remove and disconnect electrical connection from the motor.
    4. Remove the 2 hydraulic line fittings on the motor. Oil will leak out, plug the holes with the caps shipped with the new motor.
  7. Remove the motor
  8. Connect new motor to the hydraulic fittings and electrical connection. Do not re-mount on the car frame yet. Fill with Dexron III auto trans fluid through the fill hole in the motor, and re-plug the hole with the rubber stopper.
    1. Hold the motor as high as possible (cut the existing wire-ties holding the hydraulic lines to the car frame). Hold the motor so that the rubber fill plug is straight up.
    2. Hold the pistons upside down, with all fittings connected.
    3. Power the system through a couple of close/open cycles, or until the pistons move in and out freely. It may be necessary to push the piston rods into the cylinders during the first cycle(s).
    4. Turn the pistons right-side up and repeat a couple of cycles. End up with the piston rods fully retracted.
    5. Check the oil level in the motor. It will probably need to be topped off. (within ½" of the top)
    6. Extend the piston rods in preparation for re-installation.
  9. Bleed the system
    1. Once again, manually hold the top about halfway up to re-mount the top of the piston rods to the convertible top.
    2. Re-attach the bottom of the piston with the bracket. Be sure that the rubber gaskets & white plastic bushings haven't been lost.
    3. Be sure that the hydraulic lines are routed behind the seat belts.
  10. Re-install the pistons.
    1. Push the mounting grommets into the holes in the car frame. This is a bit difficult; be sure the grommets are all seated and secure!
  11. Re-install the motor.
  12. Re-install the side interior panels. Remember to re-connect the speaker wires!
  13. Re-attach the insulation. Closing the top will make it easier to get the clips back into the holes.
  14. Re-install the seat back & seat bottom.

Does a 1986 Nissan 300zx have hydraulic lifters?

Yes, 12 of them. Typically one will go bad and tick. If you're going to replace one, replace them all. Can get all 12 on ebay motors for ~$150. Replacing them all will prevent problems down the road.

How do you hook up a hydraulic log splitter to your 1956 Ford 850 tractor?

PTO, hydraulics, or neitherThe first thing you need to know is whether the tractor has a PTO (Power Take-Off) or built-in hydraulics. Given the age of the tractor in question, likely it either has a PTO or neither.

If it has hydraulics, you should be able to attach the splitter. This may require the purchase and installation of a hydraulic transfer box. Be wary if you look at doing this yourself...hyrdaulics are fluids under high pressure and can cause devastating injuries when they leak.

If the tractor has a PTO, you can get PTO-powered hydraulic transfer boxes. From what I've seen they can be really expensive.

If you have neither, you're likely not going to be able to get this working.

What Hydraulic fluid do you use for a 1999 VW Golf Cabriolet power Roof?

I found a very thorough answer to this on Edmunds.com, check the 'related links' below. This is what it says:

Electric-/hydraulic convertible top pertains to a closed hydraulic system. As a rule, a filling is only required after opening hydraulic circuit (e.g. after replacing parts).

Remove CD player if installed.

Remove screws of left luggage compartment trim and remove trim.

To fill, convertible top must be opened, actual oil level can only be determined when in an opened state.

Remove oil filler plug.

Oil for convertible top hydraulics: G002 000.

Top off hydraulic oil only until oil level is between "Min" and "Max" marking.

Use a fill container for filling hydraulic oil.

Fill container must only be used exclusively for this purpose in order to prevent hydraulic oil impurities by other oils.

Screw oil filler plug tightly (5 Nm ).

Is power steering fluid hydraulic fluid?

There are many different specification and types of Hydraulic fluid. A specific power steering fluid for one car model may not work for all cars. So be careful when you substitute different fluids. Hydraulic fluid used in aircraft is different from that used in cars. The fluid used in shock struts and landing gears are different. Swapping fluid can cause the seals to weaken and result in leaks. The term "hydraulic fluid" can be a generic word for any fluid used to power a mechanic device.

How rivited joints are made in air tight?

Riveted joints are made by drilling and deburring the rivet holes. Then hot rivets are driven (the rivet fits loosely into the hole, the driver crushes the hot rivet until it fills the hole tightly) into the holes. As the rivet cools it shrinks in length, tightening the joint (pulls the plates together). Overlapping joints (where one joint overlaps another joint) are scarfed (thinned) to fit together smoothly. After the rivets are cool the edges of the plates, or straps are caulked (upset along the edge) with a caulking chisel, to form an air tight or steam/water tight seal.

Does a Toyota starlet have a hydraulic clutch?

Yes, mine has just popped and therefore have found this out myself.

What is the purpose of a rod seal in a hydraulic cylinder?

To keep the hydraulic fluid in (double acting cylinders) and to keep dirt/washwater/etc out.