How to repair car compressor?
How to repair a car compressor, pump with their hands,automobile compressor, is a device that has significantly simplified the process of inflating tires, which was traditionally produced using a hand or foot pump. This unit can operate in automatic mode, has a compact size, and pumping tires with it does not require physical effort. Although the auto compressor does not have a complex design, some of its components may fail over time. To repair the device yourself, you need to have an idea of how it is arranged and on what principle it works. Device and principle of operation of compressors Membrane apparatus Piston units Common problems of reciprocating compressor.
The machine does not turn on. The engine of the unit works, but the air does not pump The device does not create the necessary pressure The compressor switches off spontaneously Malfunction of membrane specialists! How to change the pressure gauge in the compressor Device and principle of operation of compressors а compressor for pumping of wheels are of the diaphragm type and piston. Both types of devices are designed for air compression and differ not only structurally, but also the principle of operation. Membrane apparatus If you look at the device of the automobile compressor membrane type, you can understand that the main element of the unit, with which the air is compressed, is the membrane. It is made either of rubber or metal.
The membrane auto compressor consists of the following elements: electric motor that drives the compressor unit drive; Electromotor compression chamber with 2 valves; rubber, polymer or metal membrane located in the compression chamber; rod connecting the piston to the membrane; piston connected to rod and connecting rod; connecting rod and crank; crankcase, which houses the crank mechanism (crank). The auto compressor works on the following principle. The crank converts the rotation of the drive shaft into reciprocating movements of the connecting rod. The one connected to the piston drives it. The piston, moving up and down, drives the membrane with the rod. Moving down, the membrane creates a vacuum in the compression chamber, which opens the intake valve.
When the latter is opened, the chamber is filled with air. Moving upwards, the membrane triggers the closure of the intake valve, and the process of air compression begins. When a certain degree of compression is reached, the exhaust valve opens, after which the pressurized air enters the hose connected to the tire. When the membrane moves down again creates a vacuum in the chamber, from which the exhaust valve is closed, and the inlet-opens. Next, the whole process described above is repeated.
The principle of operation of the valve Important! Due to the fact that the compression chamber is hermetically separated from the crankcase, the air at the outlet of the device does not have any impurities. In addition, in membrane units, air leakage through the seals or piston rings is excluded, which has a positive effect on the performance of the auto compressor. Piston units In devices for pumping tires piston-type the main part is the piston Piston unit This type of automotive pump consists of the following components and parts: the electric motor driving the device drive; the compression chamber (cylinder) from the intake and exhaust valves; air filter; piston having o-ring; Crank consisting of connecting rod and crank; the crankcase, which houses the crank; pressure gauge, which is designed to monitor the level of tire pressure and can be installed on the cylinder or hose. The device works as follows.
The Lakshmi is driven either by gear or by direct drive. It converts the rotational movements of the drive shaft into reciprocating, which causes the piston to move up and down. The piston, moving down, creates a vacuum in the cylinder, which opens the intake valve. Air, passing through the filter and the opened valve, enters the cylinder. Due to the upward movement of the piston, the air in the cylinder is compressed. When a certain level of pressure in the compression chamber is reached, the exhaust valve opens, through which the air exits the apparatus. Further, when the piston moves down, the exhaust valve closes and the intake valve opens, and the cycle repeats.
Principle of operation Common problems of reciprocating compressors Since the design of membrane auto compressors is significantly different from the piston device, then some breakdowns of these devices will be characteristic only for a certain type of units. The most common malfunctions of piston,car compressors, which can be eliminated with their own hands, include the following: the machine does not turn on; the engine of the unit works, but the air does not pump; the device does not create the necessary pressure; the compressor switches off spontaneously. The machine does not turn on, ac car compressors cost, for pumping tires have a power cable (cables) to connect to a power source for 12 V. Some models of devices are connected to the cigarette lighter of the car, and some – to the battery. If the electric pump does not turn on, first of all, check the power cables for damage. They can be “rung” by the tester. Also, if the compressor is connected to the cigarette lighter, you need to check the integrity of the fuse installed in the plug. In case of fuse failure, it should be replaced. Checking the network cable Advice! Most often with the fuse burnout faced by the owners of pumps “Tornado”.
Therefore, before connecting the device to the cigarette lighter, it is necessary to check the voltage in the latter. In extreme cases, the unit may not be switched on due to failure of the motor. Most often, the motor windings burn out due to overheating. It is easier to buy a new car compressor, since the repair of the car compressor engine will cost 80% of the cost of the new device.
The engine of the unit works, but the air does not pump If when you turn on the machine you hear the sound of the engine running, but the hose does not leave the air, then to diagnose the unit, you will have to disassemble it: remove the 4 screws holding the crankcase cover; Loosening of screws also, Unscrew the 4 screws installed on the piston head; Screws remove the cylinder head. Removing the head In the cylinder head, a valve is installed, which is a frequent reason that the device does not pump. To correct the problem, remove the seal and valve disc from the piston head. Valve There is a small o-ring underneath the valve that can wear out over time. When it is worn, the valve fits loosely and passes air. As a result, compression of the latter does not occur. Also, sometimes this ring can move from its seat. If this happens, the valve will also not be able to close. Often the valve plate simply breaks. In this case, it must be replaced. This part, as well as other spare parts, can be purchased in online stores. Another reason that the machine does not swing may be a loosened screw, with which the crank is fixed to the motor shaft. Screw If the screw is unscrewed, the motor shaft will rotate, and the CRS will remain stationary. The device does not create the necessary pressure If you try to pump the tires can not achieve the required pressure, the cause of the problem may be, as in the previous case, valves. Under them, various contaminants can accumulate, preventing a good fit.
To repair the compressor for pumping tires, you will need to disassemble the piston head and clean all the parts from the accumulated dirt. Sometimes insufficient air pressure at the inlet of the unit may be due to deformation of the o-ring clad on the piston.
Sealing ring To remove the piston, you need to remove the sleeve jacket and the sleeve itself. Sleeve shirt The piston o-ring may deform due to overheating of the unit. To align the ring, it must first be softened. Either solvent 646 or liquid WD-40 can be used for this purpose. After the ring becomes soft and pliable, it should be aligned, set the sleeve and the shirt in place. Check whether the piston moves correctly in the sleeve, you can, if you scroll the engine shaft. The compressor switches off spontaneously Some models of auto compressors are protected from overheating. For this reason, the device can be turned off spontaneously, for example, during prolonged operation. But overheating of the unit can be caused by factory defects, especially in low-cost models.
There is a flaw in the poor fit of the sleeve of the device to the shirt. In this case, the heat dissipation from the piston unit decreases and, as a result, the piston head and the engine overheats. In this case, repair of the automobile pump will consist in the elimination of a gap between a sleeve and a jacket (it is possible to use thin sheet aluminum or thermal paste). Thin sheet aluminum can be ” extracted” by cutting an ordinary beer can. Aluminum needs to wrap the sleeve and firmly insert it into the shirt. After these actions, the heat dissipation will improve, and the compressor will no longer spontaneously shut down. Malfunction of membrane specialists! Membrane specialists! breaks very rarely. Although they are characterized by some breakdowns inherent in piston devices: damage to the power cable or fuse burnout in the plug that serves to connect to the cigarette lighter, how to repair car compressor.