1. Introduction
This manual provides essential information for the safe and efficient operation, setup, and maintenance of your VEVOR Mophorn Air Hydraulic Pump. This high-pressure, foot-actuated pump is designed for single-acting hydraulic cylinders, suitable for various industrial and construction applications requiring up to 10,000 PSI.

Image 1.1: VEVOR Mophorn Air Hydraulic Pump and its typical applications, including automobile repair, oil drilling platforms, frame machines, and hydraulic presses.
2. Safety Information
Read and understand all safety warnings and instructions before operating this equipment. Failure to follow these instructions may result in serious injury or property damage.
- Personal Protective Equipment: Always wear appropriate safety glasses, gloves, and protective footwear when operating hydraulic equipment.
- Pressure Hazard: Hydraulic systems operate under extremely high pressure. Never disconnect hoses or fittings while the system is pressurized. Ensure all connections are secure before applying pressure.
- Air Supply: Ensure the air supply is clean, dry, and regulated to the specified input pressure (0.7-1MPa). Exceeding the maximum input air pressure can damage the pump.
- Hydraulic Fluid: Use only recommended hydraulic oil types (HM22/HM32). Avoid skin contact and follow local regulations for disposal.
- Stable Work Area: Operate the pump on a stable, level surface. Ensure the load being lifted or pressed is properly secured and balanced.
- Single-Acting Cylinders: This pump is designed for use with single-acting cylinders only. Do not attempt to use it with double-acting cylinders.
- Maintenance: Perform regular maintenance as described in this manual. Do not modify the pump or its components. Use only genuine replacement parts.
3. Product Components
The following items are included with your VEVOR Mophorn Air Hydraulic Pump:
- Blue foot pump unit
- High-pressure oil pipe (6.56 ft / 2 m)

Image 3.1: The included high-pressure hydraulic hose with various quick couplers for versatile connections.
4. Specifications
Detailed technical specifications for the VEVOR Mophorn Air Hydraulic Pump:
| Parameter | Value |
|---|---|
| Maximum Working Pressure | 10,000 PSI (70 MPa) |
| Action Type | Single Acting |
| Flow Rate | 0.8 liters / 0.21 gallons per minute |
| Air Connection | 1/4" NPT |
| Output Oil Hole | 3/8" NPT |
| Hydraulic Oil Type | HM22 / HM32 |
| Oil Capacity | 98 cubic inches / 1.6 liters (1600 cc) / 0.42 gallons |
| Input Air Pressure | 0.7-1 MPa |
| Fuel Tank Capacity | 1.6L ± 0.1L |
| Maximum Oil Output | 1.3L |
| Hose Length | 6.56 ft / 2 m |
| Construction Material | Aviation aluminum pump core, high-quality metal shell |
| Product Dimensions (L x W x H) | 12.2 x 8.26 x 7.4 inches (31 x 21 x 19 cm) |
| Item Weight | 17.72 Pounds |

Image 4.1: Detailed dimensions of the VEVOR Mophorn Air Hydraulic Pump.
5. Setup
Follow these steps for initial setup of your hydraulic pump:
- Unpacking: Carefully remove all components from the packaging. Inspect for any shipping damage.
- Placement: Place the pump on a stable, level surface in a well-ventilated area.
- Check Hydraulic Oil Level: Ensure the hydraulic oil reservoir is filled to the appropriate level with HM22 or HM32 hydraulic oil. The oil capacity is approximately 1.6 liters. Refer to the oil filter cap for specific instructions or markings.
- Connect Air Supply: Connect your air compressor hose to the 1/4" NPT air connection port on the pump. Ensure the air supply is regulated to between 0.7-1 MPa (approximately 100-145 PSI).
- Connect Hydraulic Hose: Attach the provided 6.56 ft (2 m) high-pressure hydraulic hose to the 3/8" NPT output oil hole on the pump. Securely connect the other end of the hose to your single-acting hydraulic cylinder or tool. Ensure all connections are tight to prevent leaks.

Image 5.1: Location of the 1/4" NPT air inlet and 3/8" NPT oil outlet ports.
6. Operating Instructions
The VEVOR Mophorn Air Hydraulic Pump features a user-friendly foot-actuated design for hands-free operation.
- Initiate Pumping: With the air supply connected and the hydraulic hose attached to your cylinder, press down on the foot pedal to begin pumping hydraulic fluid. The pump will build pressure, extending the cylinder.
- Hold Pressure: To hold the load or maintain pressure, simply release your foot from the pedal. The internal relief valve will maintain the pressure in the system.
- Release Load: To release the load and retract the cylinder, fully depress the foot pedal to its lowest position. This activates the 2-stage release mechanism, allowing for fast or metered ram return.
- Monitor Pressure: Always monitor the pressure gauge (if your hydraulic cylinder or system has one) to ensure you do not exceed the maximum working pressure of 10,000 PSI.

Image 6.1: Illustration of the foot-actuated design for pumping, holding, and releasing the load.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your hydraulic pump.
- Check Oil Level: Periodically check the hydraulic oil level. Refill with recommended HM22/HM32 hydraulic oil if necessary.
- Oil Replacement: Replace hydraulic oil annually or as needed, depending on usage. Consult a qualified technician if unsure.
- Cleanliness: Keep the pump clean and free from dirt, dust, and debris. Wipe down the exterior with a clean cloth.
- Inspect Hoses and Fittings: Regularly inspect the hydraulic hose and all fittings for signs of wear, damage, or leaks. Replace any damaged components immediately.
- Storage: When not in use, store the pump in a clean, dry environment, protected from extreme temperatures and moisture.

Image 7.1: The 1.6L fuel tank capacity and oil filter location, indicating the type of hydraulic oil to use.
8. Troubleshooting
Refer to the table below for common issues and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump not building pressure | Low hydraulic oil level Insufficient air pressure Air in hydraulic system Loose connections | Check and refill oil Verify air supply is 0.7-1 MPa Bleed air from system Tighten all fittings |
| Oil leakage | Loose fittings Damaged hose or seals | Tighten connections Inspect and replace damaged components |
| Slow operation | Low air pressure Incorrect hydraulic oil viscosity | Increase air pressure to recommended range Ensure correct HM22/HM32 oil is used |
| Foot pedal stuck or stiff | Debris in mechanism Lack of lubrication | Clean pedal area Apply light lubricant to pivot points |
9. Warranty and Support
For warranty information, technical support, or service inquiries regarding your VEVOR Mophorn Air Hydraulic Pump, please contact VEVOR customer service. Refer to the official VEVOR website or your purchase documentation for contact details and warranty terms.
VEVOR Official Website: www.vevor.com







