Checking and Maintaining Hydraulic Systems

Why Hydraulic Systems Are Vital in Commercial Trucks

Hydraulic systems are at the heart of many truck operations—especially in vehicles used for dumping, lifting, towing, or steering. Whether it’s a tipper truck, crane truck, or tailgate lift, any failure in the hydraulic system can result in operational delays, safety risks, and expensive repairs.

Regular inspections and maintenance help prevent failures, increase efficiency, and ensure safe operation on the road and at job sites.

Key Components of a Truck’s Hydraulic System

Understanding what to inspect begins with knowing the core components:

• Hydraulic pump – Generates pressure by moving hydraulic fluid

• Hydraulic hoses and fittings – Deliver fluid throughout the system

• Control valves – Regulate flow and pressure

• Hydraulic cylinders – Convert fluid power into mechanical force

• Reservoir – Stores hydraulic fluid

• Filters – Remove contaminants from the fluid

All these parts must function together for smooth, reliable performance.

Signs of Hydraulic Problems

Early detection is key. Watch for:

• Unusual noises during operation (whining or knocking)

• Fluid leaks around hoses, seals, or fittings

• Slow or jerky movement of hydraulic components

• Overheating in the system

• Low fluid level or discolored fluid

• Inconsistent pressure readings or system failure under load

📌 Ignoring these signs can lead to total system failure or dangerous accidents.

How to Check a Hydraulic System: Step-by-Step

✅ 1. Visual Inspection

• Check hoses, fittings, and cylinders for leaks, cracks, or wear

• Inspect fluid levels and look for foam, discoloration, or debris in the reservoir

• Ensure the reservoir cap and filter are securely fitted

✅ 2. Test Hydraulic Functions

• Operate all hydraulic equipment fully

• Monitor for smooth, responsive movements

• Listen for any abnormal sounds or resistance

✅ 3. Check Fluid Condition

• Remove a sample and inspect for clarity and consistency

• Fluid should be clean and amber or red depending on the type

• Milky or dark fluid may indicate contamination or oxidation

✅ 4. Measure System Pressure

• Use a pressure gauge to confirm the system operates within its designated PSI range

• Low pressure can indicate a worn pump or internal leak

Maintenance Tips to Keep Your Hydraulic System Working

• 🔄 Change hydraulic fluid according to the manufacturer’s schedule or after heavy use

• 🧽 Replace filters regularly to keep fluid clean

• 🔧 Tighten fittings and connections during every inspection

• ❄️ Use proper viscosity hydraulic oil, especially in extreme weather conditions

• 🧰 Clean the reservoir and internal components at least once a year

Why This Matters for Exported Used Trucks

At EVERY Co Ltd, we ship working trucks equipped with hydraulic systems to more than 100 countries. Customers use these trucks in construction, agriculture, and transportation, where reliability is critical.

Before exporting, we inspect:

• Cylinder and pump condition

• Fluid cleanliness

• Hose integrity

• Full operational function

“The dump truck I purchased from EVERYCAR.jp arrived in excellent working condition.
The hydraulic system operates perfectly, and I could start using it immediately.
EVERY Co Ltd provided full support and details before shipping.”
— Mr. Benard M., Kigali, Rwanda

Hydraulic System Inspection Checklist

Conclusion: Stay Safe, Save Money, and Extend Truck Life

Hydraulic systems are powerful—but only when properly maintained. By incorporating routine inspections, fluid checks, and preventive maintenance, truck owners can avoid breakdowns, reduce repair costs, and keep equipment working as intended.

Looking for used Japanese trucks with reliable hydraulic systems?
Visit EVERYCAR.jp to explore our global inventory. At EVERY Co Ltd, we supply high-quality vehicles with thoroughly tested hydraulic performance.

If you are looking for Japanese Used truck, please check our list.
The list of Used Japanese used truck for sale(*Click to open).

We do our best work for all customer's partnership.
It's for SDGs goal number 17 "PARTNERSHIP FOR THE GOALS".
Let's work together!