QL 400
Reliably test hydraulic systems. Verify pump performance with confidence. Prevent machine downtime.
The QL 400 is the ultimate mobile, standalone hydraulic test system engineered for field service, commissioning, maintenance, and quality assurance. Test pressure, flow rate, and pump performance directly at the machine—fast, reproducible, and without an external test bench.
Your Benefits at a Glance
Lower Downtime Costs
Preventive hydraulic diagnostics significantly reduce unplanned machine downtime.
Maximum Equipment Availability
Accelerated troubleshooting keeps your equipment operational in the field.
Faster Commissioning
Swiftly test, tune, and approve hydraulic systems and attachments.
Mobile On-Site Testing
Perform comprehensive pump testing and load simulation anywhere, without a test bench
Repeatable Results
Fully documented measurement data for seamless quality assurance and compliance.
Mobile Hydraulic Testing for a Wide Range of Applications
The QL 400 supports service teams and engineers wherever hydraulic systems must be reliably tested, adjusted, and monitored
Detect Wear Before the Pump Fails
The QL 400 Hydraulic Test System makes the condition of hydraulic systems fully measurable, establishing a reliable foundation for data-driven service and maintenance decisions.
Detect Wear Early
Identify performance deviations before critical system failures occur
Increase Machine Availability
Reduce unplanned downtime through targeted, proactive maintenance.
Reduce Service Times
Pinpoint hydraulic faults faster and execute repairs more efficiently.
Verify Pump Performance
Reliably test and document hydraulic pump delivery and efficiency.
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One Hydraulic Test System for Four Core Applications
The QL 400 was specifically engineered for demanding field service and testing tasks. This mobile hydraulic test system enables rapid measurements directly at the machine—completely independent of external power supplies or fixed test benches.
- Standalone hydraulic test system
- Long battery runtime of up to 30 hours
- Extended operating temperature range from −20 °C to +50 °C (-4°F to 122 °F)
- Rugged, ergonomic housing designed for harsh industrial environments
- Flexible connection options via quick-change adapters
- Intuitive operation for maximum workflow efficiency
Technical Specifications – QL 400
| Specification / Feature | QL400 (600L) | QL400 (800L) |
|---|---|---|
| Pressure Range | 0–350 bar | 0-5076 psi | 0–480 bar | 0-6962 psi |
| Flow Range | 0–600 L/min | 0-159 gpm | 0–800 L/min | 0-211 gpm |
| Ambient Temperature | -20 bis 50° C | -4 to 122 °F | |
| Memory | Record up to 50 memory values | |
| Flow Accuracy | ±1% of reading | |
| Pressure Accuracy | ±1% of reading ±0,5% full scale | |
| Battery Life | Up to 30 h | |
| Standard Connection | ISO 228 G1-1/2 | |
| Optional Adapters | DKO S38 M52x2 | 1 7/8-12 UN ORB | 1 7/8-12 UN JIC | 1 7/8-12 UN ORFS | |
FAQ: Frequently Asked Questions – QL 400 Hydraulic Test System
Why should a hydraulic pump be tested regularly?
Regular testing helps detect wear early and prevent unplanned breakdowns. At the same time, fully functional components can remain in service longer instead of being replaced prematurely as a precaution.
Can the QL 400 test a hydraulic pump under load?
Yes. Thanks to the integrated load simulation, hydraulic pumps can be tested under realistic operating conditions to reliably evaluate their performance and efficiency.
How does the integrated load simulation work during hydraulic testing?
The QL 400 features an integrated, finely adjustable load control valve that allows you to continuously increase the operating pressure of the hydraulic pump under real working conditions up to its maximum rated pressure (up to 350 bar or 480 bar, depending on the model). This load simulation makes it possible to determine the exact hydraulic efficiency and wear state of axial piston pumps and gear pumps without needing to move the machine in actual operation.
Is the QL 400 suitable for mobile pump testing and field troubleshooting?
Yes. As a self-contained, standalone test system with an integrated battery, the QL 400 delivers up to 30 hours of continuous operation without an external power source. It is specifically built for preventive maintenance, troubleshooting, and fast component testing directly on construction machinery, agricultural equipment, or industrial plants.
What safety features protect the operator and machine during high-pressure testing?
Safety is paramount in high-pressure hydraulics. The integrated load valve of the QL 400 features integrated mechanical burst and overload protection that safely intercepts excessive pressure spikes (overpressure) during load simulation. Furthermore, the ergonomic housing design allows operators to read measurement values from a safe distance while the system is connected directly into the high-pressure circuit.
Datasheets & Operation Manuals
All technical documentation for the QL 400 is available for immediate download.