1. Introduction
The GOYOJO AC-2 PCP Air Compressor is a compact, portable, and oil-free air pump engineered for high-pressure air applications. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your AC-2 compressor. Please read this manual thoroughly before use and retain it for future reference.

The GOYOJO AC-2 PCP Air Compressor is suitable for various high-pressure air applications.
2. Safety Information
WARNING: Failure to follow these safety instructions may result in serious injury or property damage.
- Always operate the compressor in a well-ventilated area to prevent overheating.
- Do not operate the compressor near flammable liquids or gases.
- Ensure all connections are secure before operating. Leaks can cause rapid pressure loss and potential hazards.
- Never exceed the maximum rated pressure of the compressor (4500 PSI / 30 MPa) or the tank being filled.
- This compressor does not feature an auto-stop function. Monitor the pressure gauge closely and manually turn off the unit when the target pressure is reached.
- Allow the compressor to cool down for at least 10 minutes after 45 minutes of continuous operation to prevent overheating.
- Keep children and unauthorized personnel away from the operating compressor.
- Always wear appropriate eye protection when operating or maintaining the compressor.
- Disconnect power before performing any maintenance or adjustments.
- Do not modify the compressor or its components. Use only original replacement parts.
3. Package Contents
Verify that all items listed below are included in your package:
- 1x AC2 PCP Air Compressor Unit
- 1x AC Power Adapter
- 1x US 3-Prong AC Power Cord
- 1x 12V DC Battery Clamp Cable
- 1x Assorted Seal Kit
- 1x Test Plug for Compressor Fill Hose
- 1x Filter Replacement Kit

Ensure all listed components are present in the package.
4. Product Features
The GOYOJO AC-2 compressor offers several key features for efficient and safe operation:
- High-Pressure Output: Delivers up to 4500 PSI / 30 MPa, suitable for PCP airguns, HPA paintball tanks, and small scuba tanks.
- Oil-Free Design: Reduces maintenance and eliminates the risk of oil contamination in your air system.
- Extended Runtime: Supports up to 45 minutes of continuous operation, followed by a recommended 10-minute rest period.
- Dual Power Capability: Operates on 12V DC (car battery) or 110V/220V AC (household outlet) using the included converter and cables.
- Compact & Portable: Weighs approximately 12 lbs (5.4 kg) with dimensions of 5.12"L x 9.84"W x 9.84"H, making it easy to transport.
- Integrated Cooling System: Features a built-in cooling fan that activates automatically to manage heat during operation.
- Safety Relief Valve: Vents excess pressure to prevent over-pressurization.

Key features of the AC-2 compressor.

The compact and lightweight design ensures easy transport.
5. Setup
Before operating the compressor, ensure it is placed on a stable, flat surface in a well-ventilated area.
5.1 Component Identification

Familiarize yourself with the compressor's components.
- Handle: For carrying the unit.
- Pressure Gauge: Displays current air pressure.
- Overpressure Protection Valve: Releases pressure if it exceeds safe limits.
- High-power Cooling Fan: Automatically cools the unit during operation.
- Bleed Valve: Used to release residual pressure from the hose after filling.
- Air Compressor Switch: Powers the unit ON/OFF.
5.2 Power Connection
The AC-2 compressor supports both AC and DC power sources.

The compressor can be powered by household AC or vehicle DC.
- AC Power (Household): Connect the AC power adapter to the compressor's power input. Then, plug the 3-prong AC power cord into the adapter and a standard 110V/220V AC outlet.
- DC Power (Vehicle): Connect the 12V DC battery clamp cable to the compressor's power input. Attach the red clamp to the positive (+) terminal of a 12V vehicle battery and the black clamp to the negative (-) terminal. Ensure a secure connection.
5.3 Hose Connection
- Connect the high-pressure fill hose to the compressor's output port.
- Attach the other end of the fill hose to the fill port of your PCP airgun, HPA paintball tank, or small scuba tank. Ensure all connections are tight to prevent air leaks.
- If testing the compressor without a tank, use the included test plug to seal the fill hose.
6. Operating Instructions
Follow these steps for safe and effective operation:
- Preparation: Ensure the compressor is properly set up and connected to a power source and the tank to be filled. Confirm the bleed valve (5) is fully closed.
- Start Compressor: Flip the Air Compressor Switch (6) to the 'ON' position. The cooling fan will start, and the compressor will begin to build pressure.
- Monitor Pressure: Continuously monitor the Pressure Gauge (2). Since this model does not have an auto-stop feature, it is crucial to manually turn off the compressor once your desired pressure is reached.
- Stop Compressor: Once the target pressure is achieved, immediately flip the Air Compressor Switch (6) to the 'OFF' position.
- Bleed Pressure: Slowly open the Bleed Valve (5) to release the residual air pressure from the fill hose. You will hear air escaping. Wait until the pressure gauge reads zero.
- Disconnect: Once all pressure is released from the hose, disconnect the fill hose from your tank and then from the compressor.
- Cool Down: If the compressor has run for 45 minutes, allow it to rest for at least 10 minutes before the next operation cycle.

Always monitor the pressure gauge and use the bleed valve after filling.
7. Maintenance
The GOYOJO AC-2 is an oil-free compressor, simplifying maintenance. Regular checks ensure longevity and performance.
- Filter Replacement: Periodically inspect and replace the air filter as needed, especially if operating in dusty environments. A filter replacement kit is included.
- Cleanliness: Keep the compressor clean and free of dust and debris. Ensure the cooling fan vents are unobstructed.
- Seal Inspection: Regularly check all seals and O-rings for wear or damage. Replace any worn seals using the assorted seal kit.
- Storage: Store the compressor in a dry, cool place away from direct sunlight and extreme temperatures.
8. Troubleshooting
If you encounter issues with your GOYOJO AC-2 compressor, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Compressor does not start | No power supply; Loose power connection; Power switch off | Check power source and connections; Ensure power switch is ON. |
| No pressure build-up | Bleed valve open; Leaks in hose connections; Damaged seals | Close bleed valve; Tighten all connections; Inspect and replace seals. |
| Compressor overheats | Continuous operation for too long; Obstructed cooling vents; High ambient temperature | Allow unit to cool down (10 min rest after 45 min operation); Clear any obstructions from vents; Operate in a cooler environment. |
| Air leaks from connections | Loose connections; Worn O-rings | Tighten connections; Replace O-rings as needed. |
If the problem persists after attempting these solutions, contact customer support.
9. Specifications
| Specification | Detail |
|---|---|
| Brand | GOYOJO |
| Model Number | AC2 |
| Maximum Pressure | 4500 PSI / 30 MPa / 300 bar |
| Power Source | 12V DC or 110V/220V AC |
| Maximum Power | 300 watts |
| Air Flow Capacity | 10 liters per minute |
| Maximum Continuous Runtime | 45 minutes (followed by 10 minutes rest) |
| Noise Level | 70 dB |
| Item Weight | 12 pounds (5.4 kg) |
| Item Dimensions (L x W x H) | 5.12" x 9.84" x 9.84" (13cm x 25cm x 25cm) |
| Material Type | Alloy Steel |
| Recommended Uses | HPA Paintball Tanks, PCP Air Rifles, Small Scuba Tanks |
10. Warranty and Support
The GOYOJO AC-2 PCP Air Compressor comes with a 1-Year Manufacturer Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical support, or any questions regarding your product, please contact GOYOJO customer service through the retailer where the product was purchased or visit the official GOYOJO website for contact information.
Please have your purchase receipt and product model number (AC2) available when contacting support.