P391 Enerpac Hydraulic Hand Pump

P Series Hydraulic Lightweight Hand Pumps

When your job takes you into the field—or demands performance under pressure—you need a hydraulic hand pump that's compact, tough, and ready to deliver. The Enerpac P391 is a lightweight, single-speed hydraulic hand pump engineered for portability without sacrificing power. Designed to work seamlessly in both shop environments and remote field applications, this pump is trusted by maintenance teams, heavy equipment operators, and industrial pros who need reliable hydraulic pressure fast.

With a rugged glass-filled nylon reservoir and a durable aluminum pump body, the P391 is built for harsh conditions and tough jobs. It's not just a tool—it's your backup when powered systems fail or when mobility matters most.

Real-World Scenario: Built for the Unexpected

Imagine a field technician working on a disabled dump truck in a remote quarry. With no air or electric tools available, time is money. The P391 delivers up to 10,000 psi of hydraulic pressure manually—enough to power a cylinder and lift the truck safely to complete repairs onsite. No power? No problem.

Key Features & Real-World Benefits

• Compact, Lightweight Design (10.8 lbs)
• ➤ Easy to carry and position in tight or awkward spaces—perfect for mobile technicians.
• High-Pressure Output (Up to 10,000 psi)
• ➤ Pairs with Enerpac single-acting cylinders or tools for consistent force, even on demanding jobs.
• Glass-Filled Nylon Reservoir (45 in³ usable oil capacity)
• ➤ Corrosion-resistant, durable, and suitable for use in wet or dirty environments without cracking or leaking.
• Internal Pressure Relief Valve
• ➤ Protects both the pump and your hydraulic system from overload—peace of mind on every job.
• Ergonomic Grip & Handle Lock
• ➤ Reduces fatigue and ensures secure transport, whether it's bouncing in your truck or strapped to a pack.
• Field-Serviceable Components
• ➤ Designed with longevity in mind—easily repairable with Enerpac's widely available service kits.

Technical Specifications

• Pump Type: Single-Speed, Manual
• Max Operating Pressure: 10,000 psi
• Oil Capacity (Usable): 45 in³
• Reservoir Material: Glass-filled nylon
• Weight: 10.8 lbs
• Port Size: 3/8" NPTF
• Dimensions: 20.75" x 5.25" x 5.5"

Frequently Asked Questions

1. What makes the Enerpac P391 different from other hand pumps?

The P391 stands out due to its lightweight, corrosion-resistant design and high-pressure output. It combines portability with the power professionals need in the field.

2. Is this pump suitable for both vertical and horizontal use?

Yes, the P391 is designed for flexible positioning, making it ideal for horizontal and vertical applications—whether you're lifting, pressing, or spreading.

3. Can I use the P391 in field environments without access to power?

Absolutely. It's manual, so there's no need for electricity or compressed air. It's commonly used in remote industrial, mining, and construction sites.

4. Is this pump serviceable, or is it a disposable tool?

The P391 is fully serviceable. Enerpac offers replacement parts and service kits so you can maintain performance over the long term.

5. What kind of hydraulic cylinders work best with the P391?

The P391 is compatible with Enerpac's single-acting cylinders and tools rated up to 10,000 psi. Just be sure to match the oil volume to your tool's requirements.

Whether you're troubleshooting machinery in a remote plant, maintaining heavy equipment in the field, or simply need a backup for your hydraulic system, the Enerpac P391 is the professional's choice for manual hydraulic power. It's compact, capable, and built to go wherever your work takes you. Trust Enerpac for the performance and dependability your job demands.