Analogue Hydraulic Flow Testers for Accurate Flow & Pressure Diagnostics
When heavy machinery loses power, operates sluggishly, or begins overheating, accurate hydraulic diagnostics are essential to identify the cause quickly. An analogue hydraulic flow tester provides mechanics, service technicians, and maintenance teams with a fast and reliable way to measure hydraulic flow, pressure, and, in many cases, oil temperature simultaneously — without dismantling expensive hydraulic components.
Supplied by Gerrard Hydraulics, these professional hydraulic testing solutions are designed for demanding Australian conditions, supporting technicians across construction, mining, agriculture, manufacturing, transport, marine, and industrial applications.
Built for field servicing and workshop diagnostics, a hydraulic flow tester kit allows technicians to evaluate pump performance, troubleshoot hydraulic faults, verify component operation, and identify performance issues before they lead to costly equipment downtime.
What Is an Analogue Hydraulic Flow Tester?
An analogue hydraulic flow tester is a mechanical diagnostic instrument used to measure hydraulic fluid flow and pressure within a hydraulic system. The tester is connected directly into the hydraulic circuit, typically between the pump and downstream components, allowing technicians to monitor system performance while machinery is operating.
Unlike digital flow meters that rely on electronic sensors, microprocessors, and powered displays, analogue flow testers use mechanical measuring systems such as spring-loaded pistons, calibrated orifices, variable-area flow indicators, and analogue gauges to provide real-time readings.
This makes them particularly valuable for mobile equipment servicing, remote job sites, and harsh industrial environments where durability and reliability are critical.
Key Capabilities of an Analogue Hydraulic Flow Tester
Simultaneous Flow and Pressure Measurement
A hydraulic flow and pressure tester measures both hydraulic fluid flow rate and system pressure at the same time, providing a more complete picture of hydraulic performance.
Measurements are typically displayed as:
- Flow rate: Litres per minute (L/min) or Gallons per minute (GPM)
- Pressure: PSI or bar
Unlike a standard pressure gauge, a flow tester can reveal whether a hydraulic pump is maintaining the required flow output under operating pressure.
Simulated Load Testing
Many professional hydraulic flow tester kits feature an adjustable load valve that allows technicians to restrict oil flow and increase system pressure.
This simulates real working conditions and helps identify issues that may only appear when equipment is under load, including:
- Worn hydraulic pumps
- Internal leakage
- Inefficient valves
- Reduced component performance
Reliable Operation Without Complex Electronics
Portable analogue hydraulic testers provide instant mechanical feedback without relying on batteries, software, or delicate electronic displays.
This makes them ideal for:
- Construction sites
- Mining operations
- Agricultural environments
- Mobile service vehicles
- Industrial workshops
where vibration, dust, moisture, and temperature changes are common.
What Can You Diagnose With a Hydraulic Flow Tester?
Unlike a standard pressure gauge that only measures system pressure, a hydraulic flow tester measures both hydraulic flow rate and pressure to provide a more complete picture of system performance.
By analysing these measurements together, technicians can accurately identify performance losses, pinpoint faults, and determine whether issues originate from the pump, valves, cylinders, motors, hoses, or auxiliary attachments—helping prevent unnecessary repairs and reducing equipment downtime.
| Diagnostic Area | Common Issues Identified | Operational Impact |
| Hydraulic Pump Performance | Internal wear, damaged seals, pump cavitation | Slow machine operation, reduced hydraulic power, overheating oil |
| Relief Valve Testing | Incorrect pressure settings, sticking or faulty relief valves | Reduced lifting capacity, excessive system pressure, component stress |
| Flow Restrictions | Blocked filters, collapsed hoses, restricted hydraulic lines | Increased backpressure, reduced efficiency, sluggish performance |
| Internal Leakage | Internal bypass leakage in cylinders, hydraulic motors, or control valves | Slow cycle times, drifting loads, loss of hydraulic force |
| Attachment Performance | Incorrect auxiliary flow or pressure supplied to hydraulic attachments | Poor attachment operation, reduced productivity, premature component wear |
A hydraulic flow tester provides technicians with the information needed to quickly determine whether a fault lies with the hydraulic pump, control valves, cylinders, motors, attachments, or other hydraulic components. This enables faster, more accurate diagnostics, minimises unnecessary parts replacement, and helps keep machinery operating at peak efficiency while reducing maintenance costs and downtime.
Industry Applications Across Australia
Analogue hydraulic flow testers are essential diagnostic tools used by mobile service technicians, maintenance teams, and industrial workshops across Australia.
Their rugged mechanical design makes them particularly suited to industries where equipment operates in demanding environments.
Construction & Earthmoving
Construction equipment relies heavily on hydraulic power for lifting, digging, steering, and operating attachments.
Hydraulic flow testers are commonly used for:
- Checking hydraulic pump efficiency
- Testing auxiliary hydraulic circuits
- Verifying attachment compatibility
- Diagnosing slow or weak machine performance
Common machinery includes:
- Excavators
- Skid steers
- Wheel loaders
- Bulldozers
- Backhoes
- Hydraulic breakers and attachments
Before installing attachments such as hydraulic hammers, technicians can use a hydraulic flow tester kit to confirm the machine provides the correct flow and pressure requirements.
Mining & Quarrying
Mining equipment operates under some of the harshest conditions, often in remote locations where reliable diagnostics are essential.
Analogue hydraulic flow testers are used for troubleshooting:
- Underground loaders
- Haul trucks
- Drill rigs
- Rock crushers
- Heavy processing equipment
Applications include:
- Monitoring high-pressure hydraulic circuits
- Testing pump performance
- Identifying flow losses
- Diagnosing hydraulic component wear
Their ability to operate without batteries makes analogue testers particularly practical for remote mining environments.
Agriculture & Forestry
Agricultural and forestry machinery depends on hydraulic systems for attachments, steering, lifting, and specialised operations.
Hydraulic testing applications include:
- Checking tractor hydraulic remotes
- Testing implement flow requirements
- Diagnosing hydraulic performance issues
Common machinery includes:
- Tractors
- Combine harvesters
- Balers
- Timber harvesters
- Feller bunchers
Regular hydraulic testing helps ensure equipment performs reliably during demanding seasonal workloads.
Material Handling & Logistics
Reliable hydraulic performance is critical for equipment responsible for lifting and moving heavy loads.
Analogue hydraulic flow testers are used on:
- Forklifts
- Telehandlers
- Mobile cranes
- Container handlers
- Scissor lifts
Technicians use flow and pressure testing to verify:
- Lifting performance
- Hydraulic valve operation
- System pressure settings
- Safety-critical components
Manufacturing & Marine
Hydraulic systems remain essential in industrial manufacturing and marine applications.
Common uses include troubleshooting:
- Hydraulic Power Units (HPUs)
- Hydraulic presses
- Injection moulding equipment
- Ship steering systems
- Hydraulic cranes
- Deck winches
Portable analogue flow testers provide maintenance teams with a practical diagnostic solution without requiring extended equipment shutdowns.
Key Features of a Professional Hydraulic Flow Tester Kit
When selecting an industrial hydraulic flow tester for sale, important features include:
Integrated Load Valve
An adjustable load valve allows technicians to safely increase hydraulic pressure and simulate working conditions.
This helps identify whether pumps and hydraulic components maintain performance under load.
Clear Analogue Gauges
Professional testers feature easy-to-read gauges designed for workshop and field environments.
Benefits include:
- Clear flow and pressure readings
- Fast visual diagnostics
- Reduced setup complexity
Heavy-Duty Construction
Industrial hydraulic testers should be designed to withstand:
- Vibration
- Pressure fluctuations
- Dust
- Frequent transport between job sites
High-Pressure Hose Assemblies
Quality hydraulic flow tester kits include suitable hoses, fittings, and quick-connect couplings designed for safe hydraulic testing.
Frequently Asked Questions
What is the difference between a pressure gauge and a hydraulic flow tester?
A pressure gauge only measures hydraulic pressure within the system.
A hydraulic flow tester measures both pressure and fluid movement, allowing technicians to evaluate pump efficiency, identify flow restrictions, and diagnose internal hydraulic problems.
How does a load valve help with hydraulic diagnostics?
A load valve restricts hydraulic flow to simulate operating conditions similar to when machinery is working under heavy loads.
If a hydraulic pump produces acceptable pressure but the flow rate drops significantly as pressure increases, this can indicate internal wear or reduced pump efficiency.
Why choose an analogue hydraulic flow tester over a digital model?
Analogue hydraulic flow testers are popular for field servicing because they are simple to operate, durable, and provide immediate visual feedback.
They are especially useful in environments where equipment is exposed to:
- Dust
- Vibration
- Remote locations
- Extreme operating conditions
How do I choose the right hydraulic flow tester kit?
The correct tester depends on:
- Required flow range
- Maximum operating pressure
- Machine type
- Connection requirements
- Whether testing is performed in a workshop or field environment
A hydraulic specialist can help select the correct configuration for your application.
Request a Quote From Gerrard Hydraulics
Keep your machinery operating efficiently with a professional analogue hydraulic flow tester kit from Gerrard Hydraulics.
Our hydraulic testing solutions are designed for accurate flow and pressure diagnostics across construction, mining, agriculture, manufacturing, transport, and marine industries.
Contact Gerrard Hydraulics today to discuss your requirements and find the right hydraulic flow tester, hydraulic flow meter tester, or hydraulic flow and pressure tester for your equipment.
📍 39 Sorbonne Crescent, Canning Vale WA 6155
📞 (08) 9455 2344
✉ admin@gerrardhydraulics.com.au
