Why is it necessary and how to pump the clutch correctly?
Tips for motorists

Why is it necessary and how to pump the clutch correctly?

The clutch is a device that allows the transfer or distribution of power between the engine and the transmission system to ensure smooth and gradual operation during gear changes, protecting both the gearbox and the engine itself.

Given its role, it is obvious that this is part of a vehicle that has undergone a lot of effort, and therefore it is very important to do the right preventive maintenance and maintenance to prevent its premature wear, which is why pumping the clutch from time to time is suitable.

Types of clutch

Although friction clutches can be classified based on various factors, the most common way to do this is by type of control:

  1. Friction clutches. In this class, the clutch, steering wheel, the engine is attached and separated from the gearbox due to the clutch disc and transmission shaft. This disk is coupled to the engine flywheel due to the plate and oppressors, and the action of the springs (via cable) or using a hydraulic actuator.
  2. Hydraulic clutch. In this type of clutch, rotational motion from the engine drives the pump, and the fluid of the hydraulic pump circulates through the rotating turbines mounted on the gearbox. This type of clutch is usually installed in cars with an automatic transmission with a torque converter and in trucks.
  3. Electromagnetic clutch. This is another type of clutch that allows you to transfer power from the engine to the gearbox, due to the effect of the electromagnetic field. This clutch is rarely used in conventional cars because of its high cost, but can more often be used in heavy industrial equipment.

Why is it worth pumping the clutch? How to do it?

Bleeding the clutch is an important task in a car service that uses a hydraulic system.

In a hydraulic system, brake fluid flows in a closed circuit and the presence of air bubbles in it not only implies a change during operation, but can also lead to malfunctions in other parts that are interconnected with it.

The clutch system that requires cleaning may show the following symptoms:

  • Pedal stroke change
  • Clutch Return Difficulties
  • Sensation of inaccuracy when touching the pedal

Given these symptoms, or after replacing any component associated with the tightness of the hydraulic circuit, the clutch should be pumped in accordance with the manufacturer's recommendations.

The purge method can be manual, but in the technical workshop you can also do this using a purge computer.

As a rule, to clean the coupling manually, the following steps are followed:

  1. Check that the brake fluid level is the recommended one (couplings, as a rule, use the same fluid as the brakes and use the same capacity as this system).
  2. Depress the clutch pedal to the end of its stroke (it is possible to get to the lower level several times, gently press / pump).
  3. Remove the cap and secure the hose in a container that is suitable for brake fluid on the relief valve (note that brake fluid has an abrasive effect on enamels and paints. In addition, it may result in injury from contact with skin and eyes, therefore it is important to have appropriate protective equipment).
  4. Open the air vent valve and hold the clutch pedal tight.
  5. Close the air exhaust valve.
  6. Slowly releasing the clutch pedal.
  7. Repeat this process until the purge is complete and no discharge air is noticeable in the drain.
  8. During bleeding the clutch, and, depending on the amount of fluid that will be removed, you must replenish the brake fluid reservoir.
  9. Close the reset valve all the way and install the cover.
  10. Check clutch drive and system for leaks.

On the other hand, in order to clean the coupling using special equipment for this purpose, as a rule, the following actions are performed:

  1. Unscrew the brake fluid tank cap.
  2. Fix the drain equipment into the tank of this system and connect it.
  3. Remove the cover and fasten the hose to a container suitable for brake fluid and purge valve. Some purge computers include a vacuum unit to balance the fluid level during the process.
  4. Open and close the purge valve until the brake fluid flows without bubbles and impurities.
  5. Close the reset valve all the way and install the cover.
  6. Turn off the device to replace the brake fluid.
  7. Check the brake fluid level and adjust if necessary.
  8. Check clutch drive and system for leaks.

Conclusion and recommendations

Replacing a car's clutch is an intervention in the car's structure that must take place in a workshop, which involves a significant investment on the part of the car enthusiast. Therefore, it is very important to observe proper maintenance in order to keep it running as mono longer.

Thus, it is very important to notice deviations in the operation of the clutch, no matter how small, in order to prevent breakdowns. In addition, blowing out the clutch is an important preventative procedure to prolong the life of the clutch. It is very important to do this after every brake fluid change, which is usually every 30000 or 40000 km, or every two years.

Questions and answers:

How to bleed the clutch with the pedal? Add brake fluid to the reservoir (do not top up about 2 cm to the edge), remove the cap from the bypass valve, and put on a hose dipped in fresh brake fluid instead. The pedal is pressed smoothly - excess air will escape into the container. If necessary, the TZ is topped up into the tank.

How can you bleed the clutch alone? Adjust the clutch. Follow the procedure described above and then fix the pedal. The bypass valve closes, the pedal is released, the valve opens. Repeat the procedure until the tank stops emptying.

In what position should the clutch grip? Usually, this process should start when you release the pedal slightly. The earlier it works, the harder it will grasp. Ideally - closer to the middle of the pedal travel, but not later.

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