How to pump out shock absorbers?

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How to pump out shock absorbers?

New shock absorbers must be pumped beforeinstallation. This is due to the fact that there is air in the inner sleeve of the device, which must be pushed out for the proper functioning of the car racks. Otherwise, the failure of the mechanism may lead to its rapid failure.

General rules for pumping shock absorbers

  • Shock absorbers are pumped in an upright position (that is, with the rod facing up);
  • After pumping, the device must still be kept in an upright position until mounted on the vehicle.

How to pump new shock absorbers

How to pump the front legs

  1. Set the shock absorber to the upright position with the stem facing up.
  2. Wait three seconds, and then gently squeeze the device slowly until the surface of the rod is at the top of the cylinder by two to three centimeters.
  3. Secure the shock absorber rod in this position for a couple of seconds.
  4. Without sudden movements, smoothly pull the rod up to the released state.
  5. Repeat the above steps several times (two to three), ending the procedure on step four.
  6. Then it is required to carry out the control procedure: keeping the shock absorber in an upright position with the rod upwards, with sharp rapid movements, pump the rod.

How to pump the rear pillars

  1. Turn the device upside down with the stem.
  2. Wait three seconds, and then start smoothly squeezing the shock absorber.
  3. Fix the shock absorber rod for five seconds.
  4. Turn the shock absorber in a compressed position with the stem facing up, holding it by the rod.
  5. Hold the device in this state for four to six seconds.
  6. Pull out the rod until the end of the stroke is smooth.
  7. Reverse the shock absorber with the stem facing down and hold it for a few seconds.
  8. Repeat the operation from one to seven times, stopping at point six (for better performance of the device you need to make at least five procedures).
  9. Then it is required to carry out the control procedure: keeping the shock absorber in an upright position with the rod upwards, with sharp rapid movements, pump the rod.

We remind you that after pumping new shock absorbers it is necessary to hold the device with the rod upwards until installation on your car.

After bleeding the mechanism, check for smoothnessmoving the rod: it must move gently and without strong failures. If you hear strange sounds or the stem is not moving smooth enough, you need to repeat the bleeding procedure before troubleshooting.

Read another of our articles on the chosen topic - How to pump racks.

Before the replacement of shock absorbers, check its technical condition. How to inspect the device, read in our article How to check the shock absorber.

How to pump old shock absorbers

  1. Remove the fasteners from the old shock absorber.
  2. Next, remove the upper cap.
  3. Unscrew the nut and remove the stem with the cylinder.
  4. Then you need to drain the old oil by pressing the valve on the bottom of the unit.
  5. Remove the clip, turn the cylinder over and drain the residual oil.
  6. Remove the dismountable parts of the device and check for defects (if necessary, purchase new parts).
  7. Old parts are required to clean and remove fat from them.
  8. Then assemble the cylinder and fill the new oil in the rack.
  9. Insert the cylinder into the rack and pull out the stem.
  10. Then it is necessary to pump the shock absorber according to the scheme described above (for the front or rear device).
  11. After refilling, replace the device.

If you have any difficulties in this task, you can always contact any car service center.

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