Insufficient pressure in the tires when working compressor of the automobile Berkut R20 most often indicates wear of piston rings or a violation of the tightness of the valve group. Owners of a two-piston unit often face a drop in real performance after 2-3 years of active operation, especially if the device was used to swap off-road cameras or work with a pneumatic tool. Ignoring primary symptoms, such as heating the body or a decrease in the pumping speed, leads to bullies in the cylinders and failure of the electric motor.
This model is positioned as a professional solution for preparing the car for difficult road conditions, but even reliable equipment. Berkut It requires regular maintenance. The design of the piston group allows recovery, but for this it is necessary to clearly understand the device of the compression unit and know the parameters of the regular seals. In the material we will analyze in detail the design features, typical breakdowns and methods of their elimination with their own hands.
Design features and principle of work
The device is based on a two-stage air compression scheme implemented through two pistons of different diameters. The first piston, having a larger diameter, performs the function of pre-compression, after which air enters the second cylinder for the final push to the working pressure. This architecture allows for compressor Berkut R20 It can reach up to 14 atmospheres, which is much higher than the capabilities of most single-piston analogues.
The main components of the unit:
- 🔧 Piston group: made of aluminum alloy with cast iron sleeves, which provides effective heat sink and durability of rubbing pairs.
- ⚙️ The crank-shatter mechanism: made of hardened steel, shaft balancing reduces vibration when working at high revs.
- 🌬️ Cooling system: forced blowing of the electric motor and ribbed surface of the cylinders prevent overheating during a long cycle of operation.
The electric motor of the unit is powered by an onboard network of 12 Volts and consumes current up to 25 Amps, which requires connection through the battery terminals, rather than through a lighter. Critically important use wires with a cross section of at least 2.5 mm2 to minimize voltage losses and prevent insulation melting. The design includes built-in pressure gauges to monitor the pressure in each compression cascade, allowing the operator to diagnose the performance of the steps.
⚠️ Attention: It is strictly forbidden to operate the device with a damaged network cable or ground circuit. Working in high humidity conditions without additional protection can lead to electric shock or short circuit.
Technical characteristics of the R20 model
Model R20 It differs from the lighter versions of the series in increased resource and the ability to work in intensive mode. The two-cylinder layout provides high performance, measured in liters per minute, allowing for quick pumping of large diameter tires used on SUVs and light trucks.
Table of main parameters:
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Productivity | 72 | l-min |
| Maximum pressure | 14 | Atm (Bar) |
| Current consumption | 25 | And |
| Mode of work | 30 mins/30 mins | mine |
An important aspect is the work schedule, which is 30 minutes of work and 30 minutes of rest. This limitation is associated with the thermal mode of operation of the windings of the electric motor and the piston group. Exceeding the time interval of continuous operation can lead to thermal deformation of parts and accelerated aging of the lubricant.
Typical malfunctions and diagnosis
Decreased performance is often accompanied by the appearance of extraneous noise and increased time pumping wheels. The main reasons for the loss of power in compressor become coking valves, wear of the ossels or a violation of the tightness of the connections. Diagnosis begins with a visual inspection and listening to the engine idling without load.
If the unit is buzzing, but the air pumps weakly, you should check the condition of the air filter and valve group. A clogged filter creates a vacuum at the inlet, making it difficult for the piston to work, and the loose fit of the petal valves causes a reverse air throw. To check the tightness, you can apply a soap solution to the connections and valve covers when the engine is running - the appearance of bubbles will indicate the place of leakage.
Signs of critical wear
If when working from the exhaust pipe (if any) or sapuna there is heavy smoke, this indicates the oil entering the combustion chamber. This may be due to the occurrence of rings or damage to oil caps.
Replacement of piston rings and maintenance
Compressor recovery process Berkut R20 It requires accuracy and a basic set of tools. Before starting work, it is necessary to disconnect the device from the power supply network and completely burn the residual pressure from the system. Disassembly is carried out in sequence: removal of the protective casing, disconnection of the pipes, dismantling of the cylinder head.
☑️ Ring replacement procedure
After extraction of pistons, it is necessary to remove the coar from the surface of the cylinders and grooves under the rings. The new rings are set to take into account the orientation of the locks, which must be deployed in different directions to minimize the gas breakthrough. Assembly is made with the application of a thin layer of heat-resistant lubricant on rubbing surfaces.
⚠️ Attention: When assembling a piston group (it is forbidden) to use force to press the piston. Use a special mandating ring or gently squeeze the rings with your fingers so as not to break them when entering the cylinder sleeve.
Pressure adjustment and operation with a pressure gauge
Manometers installed on the compressorThey are used for operational control but may require periodic calibration. For accurate pressure setting in the system, you can use an external reference pressure gauge connected parallel to the standard one. The difference in readings is compensated by adjusting or replacing the measuring device.
To extend the life of the pressure gauge, it is recommended to install it through a damper or use models with glycerol filling, which extinguish the vibrations of the arrow.
Working with a pneumatic tool requires the installation of a receiver or the use of a built-in receiver (if the model is modified), since the direct flow from the two-piston compressor has pulsations. The cutoff pressure is regulated by a pressostat, which opens the supply chain when a given threshold is reached.
Operation and storage recommendations
To ensure stable employment Berkut R20 The temperature of operation must be observed. Starting a cold engine in winter requires pre-warming up in a warm room or short-term cycles of work without load. The oil in the crankcase (if the design provides for grease spraying) should be changed according to the regulations, using only the compositions recommended by the manufacturer.
The main resource of the compressor depends on the purity of the incoming air and the timely replacement of the filter elements.
When storing the device, it is recommended to treat metal surfaces with an anti-corrosion composition and remove the unit in a dry room. Long-term storage in a wet environment leads to oxidation of the contacts and corrosion of the internal surfaces of the cylinders, which can cause jamming at the next start.
Frequently Asked Questions (FAQ)
What oil to pour into the Berkut R20 compressor?
For lubrication of the piston group, it is recommended to use special compressor oils with ISO 100 viscosity or similar synthetic compositions designed for high temperatures. It is not recommended to use motor oils with detergent additives.
Why is the compressor so hot?
Heating is a natural process in compressing gas. However, excessive heating may indicate contamination of the cooling ribs, fan malfunction, or operating in a mode exceeding 50% of the duty cycle (onset time).
Can I connect the R20 via a lighter?
No, the current consumed at 25 Amps exceeds the permissible load on the standard cigarette lighter chain (usually 10-15 Amps). Connection is possible only directly to the terminals of the battery through the fuse.
Where can I find compressor parts?
Original spare parts such as piston rings, valves and gaskets are available at the manufacturer's authorized service centers or specialty pneumatics stores.