Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Scheppach HC52DC 50L Double Cylinder Air Compressor. Please read this manual thoroughly before operating the compressor and keep it for future reference.
The HC52DC is a powerful 3.0 HP (2200W) oil-lubricated air compressor designed for demanding tasks in workshops, garages, and construction sites, featuring a 50-liter tank and a maximum operating pressure of 8 bar.
Safety Instructions
WARNING: Failure to follow these safety instructions may result in serious injury or property damage.
General Safety
- Always wear appropriate personal protective equipment (PPE), including eye protection and hearing protection, when operating the compressor.
- Ensure the work area is well-ventilated and free from flammable materials.
- Keep children and unauthorized persons away from the compressor during operation.
- Do not operate the compressor if it is damaged or malfunctioning.
- Never direct compressed air at people or animals.
- Disconnect the compressor from the power supply before performing any maintenance or repairs.
Electrical Safety
- Ensure the power supply voltage matches the compressor's requirements (230 Volts).
- Use only grounded outlets and extension cords suitable for the compressor's power rating (2200 Watts, 16 Amps).
- Do not operate the compressor in wet or damp conditions.
- Never pull the power cord to disconnect the plug.
Air Compressor Specific Safety
- Do not exceed the maximum operating pressure of 8 bar.
- Regularly drain condensation from the air tank to prevent corrosion and maintain performance.
- Ensure all air connections are secure before operation.
- Do not modify the pressure relief valve or any other safety device.
Product Overview
The Scheppach HC52DC is a robust air compressor designed for various pneumatic applications. Key features include a 50-liter tank, a powerful 3.0 HP motor, and dual quick-connect couplings for versatile tool usage.

Figure 1: Overall view of the Scheppach HC52DC 50L Double Cylinder Air Compressor, showcasing its blue tank, black motor housing, wheels, and handle.
Main Components:
- Air Tank: 50-liter capacity for compressed air storage.
- Motor: 3.0 HP (2200W) electric motor.
- Pump: Double cylinder, oil-lubricated pump for efficient air compression.
- Pressure Gauges: Two gauges to monitor tank pressure and regulated output pressure.
- Pressure Regulator: Adjustable control for setting output air pressure.
- Quick-Connect Couplings: Dual outlets for connecting pneumatic tools.
- Wheels and Handle: For easy portability.
- Drain Valve: Located at the bottom of the tank for condensation removal.
- Air Filter: Protects the pump from dust and debris.
Setup
1. Unpacking and Inspection
Carefully remove the compressor from its packaging. Inspect for any signs of shipping damage. Report any damage to your supplier immediately.
2. Assembly
- Attach Wheels: Securely fasten the wheels to the compressor frame using the provided hardware.
- Install Handle: Mount the transport handle to the designated points on the compressor.
- Mount Air Filter: Screw the air filter into the air intake port on the pump. Ensure it is hand-tightened.
- Check Oil Level: The compressor is oil-lubricated. Before first use, check the oil level using the dipstick or sight glass. If necessary, add appropriate compressor oil until the level is between the minimum and maximum marks. Refer to the specifications for recommended oil type.
3. Positioning the Compressor
Place the compressor on a firm, level surface to ensure stability and proper lubrication. Allow adequate space around the unit for ventilation.
4. Electrical Connection
Connect the compressor to a grounded 230 Volt, 50 Hz power outlet. Ensure the circuit can handle the compressor's 2200 Watt (16 Amp) power requirement. Avoid using long or undersized extension cords, as this can lead to voltage drop and motor damage.
Operating Instructions
1. Pre-Operation Checks
- Verify the oil level is correct.
- Ensure the drain valve at the bottom of the tank is closed.
- Check that all connections (hoses, tools) are secure.
2. Starting the Compressor
Plug the compressor into a suitable power outlet. Turn the power switch to the "ON" position. The compressor will start to build pressure in the tank. It will automatically shut off once the maximum tank pressure (8 bar) is reached.
3. Adjusting Output Pressure and Connecting Tools

Figure 2: Detail of the dual pressure gauges and quick-connect couplings, allowing for precise pressure control for different pneumatic tools.
- Connect your pneumatic tool to one of the quick-connect couplings.
- Use the pressure regulator knob to adjust the output pressure to the required setting for your tool. The regulated pressure will be displayed on one of the gauges.
- The other gauge displays the internal tank pressure.

Figure 3: The Scheppach HC52DC compressor in use, demonstrating its portability and application for tasks such as tire inflation.
4. Shutting Down
When finished, turn the power switch to the "OFF" position. Disconnect the power cord from the outlet. Release any remaining air pressure from the tank by opening the drain valve or using a tool until the tank pressure gauge reads zero.
5. Draining Condensation
After each use, or at least daily, drain the condensation from the air tank. Place a suitable container under the drain valve located at the bottom of the tank. Slowly open the drain valve to release accumulated moisture. Close the valve once all moisture has been expelled.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your air compressor.
Daily Maintenance:
- Drain condensation from the air tank.
- Check oil level and top up if necessary.
- Inspect for any visible damage or leaks.
Weekly / Every 20 Hours of Operation:
- Clean the air filter. If heavily soiled, replace it.
- Check all fasteners for tightness.
Monthly / Every 50 Hours of Operation:
- Oil Change: Change the compressor oil. Refer to the specifications for the correct oil type. Drain old oil completely before refilling.
- Inspect the pressure relief valve by gently pulling its ring to ensure it operates freely.
Troubleshooting
This section provides solutions to common issues you might encounter.
| Problem | Possible Cause | Solution |
|---|---|---|
| Compressor does not start. | No power supply; Thermal overload activated; Faulty switch. | Check power connection and circuit breaker; Allow motor to cool down; Contact qualified service personnel. |
| Compressor runs continuously or frequently. | Air leak in system; Excessive air consumption; Pressure switch malfunction. | Check all connections for leaks (use soapy water); Reduce air tool usage; Contact qualified service personnel. |
| Low air pressure at outlet. | Pressure regulator set too low; Air leak; Clogged air filter. | Adjust pressure regulator; Check for leaks; Clean or replace air filter. |
| Excessive noise or vibration. | Loose components; Low oil level; Worn parts. | Tighten all fasteners; Check and top up oil level; Contact qualified service personnel. |
| Oil leakage. | Loose fittings; Damaged seals. | Tighten fittings; Contact qualified service personnel for seal replacement. |
Specifications
Technical data for the Scheppach HC52DC 50L Double Cylinder Air Compressor.
| Parameter | Value |
|---|---|
| Model | HC52DC (5906101901) |
| Brand | Scheppach |
| Motor Horsepower | 3.0 HP |
| Maximum Power | 2200 Watts |
| Voltage | 230 Volts |
| AC Adapter Current | 16 Amps |
| Tank Volume | 50 Liters |
| Maximum Operating Pressure | 8 Bars |
| Air Flow Capacity (Suction Power) | 412 L/min |
| Noise Level | 97 dB |
| Item Weight | 41 Kilograms (90.2 pounds) |
| Product Dimensions (L x W x H) | 28.35" x 16.54" x 29.13" |
| Power Source | Corded Electric |
| Recommended Uses | Workshop, Garage, Home |
Warranty and Support
Scheppach products are manufactured to high quality standards. In the unlikely event of a defect, please contact your retailer or the authorized Scheppach service center.
Please retain your proof of purchase for warranty claims. Spare parts availability for this model is typically 7 years from the date of purchase.
For further assistance or technical support, please refer to the contact information provided with your purchase or visit the official Scheppach website.





