Hydraulic systems are the powerhouse behind every Takeuchi excavator, ensuring smooth operation and efficient performance across a wide range of tasks. However, like any mechanical system, hydraulics can experience wear, contamination, or failure if not properly maintained. Recognising and addressing issues early can reduce downtime, prevent damage, and extend the life of your equipment.
In this guide, we’ll outline the most common hydraulic problems in excavators, how to identify them, and practical ways to resolve each issue.
1. Hydraulic Fluid Contamination
Contaminated hydraulic fluid is a leading cause of system inefficiencies. Dirt, water, and metal shavings can enter the fluid through damaged seals, poor storage practices, or improper servicing.
Symptoms:
● Erratic performance
● Increased operating temperatures
● Unusual noises or sluggish movement
Fix:
● Replace all hydraulic filters and flush the system
● Refill with high-quality, manufacturer-approved hydraulic oil
● Ensure all reservoirs and lines are clean before refilling
Routine checks and proper fluid storage help avoid this issue altogether.
2. Leaking Hydraulic Hoses or Fittings
Leaks are common but can quickly become dangerous and costly if ignored. Even a small leak can lower system pressure and lead to performance problems.
Symptoms:
● Visible fluid near hose connections
● Reduced pressure or sluggish arm and bucket operation
● Damp patches around fittings or seals
Fix:
● Inspect hoses and fittings regularly
● Replace cracked or bulging hoses immediately
● Tighten connections to the recommended torque, but avoid overtightening
Using high-quality OEM parts for replacements ensures better longevity and fit.
3. Overheating Hydraulic System
Excess heat can cause fluid breakdown and long-term damage to seals, pumps, and cylinders.
Symptoms:
● Warning lights on the operator display
● Reduced system response
● Fluid that smells burnt or appears discoloured
Fix:
● Check the cooling fan and oil cooler for blockages
● Ensure the oil reservoir is at the correct level
● Inspect for excessive backpressure in return lines
Always monitor temperature gauges during operation, particularly in high-demand or hot-weather conditions.
4. Noisy Hydraulic Pump or System
Unusual whining, knocking, or grinding sounds from a Takeuchi excavator may signal pump cavitation or aeration.
Symptoms:
● High-pitched whines from the pump
● Vibrations in the control levers
● Reduced lifting or digging power
Fix:
● Ensure the pump is primed properly after fluid replacement
● Check for air leaks in the suction line or fittings
● Inspect for collapsed hoses or blocked filters
Ignoring pump noise can lead to full pump failure and a costly rebuild.
5. Slow or Unresponsive Hydraulic Functions
When the arm, boom, or bucket starts to lag, it may be due to internal wear or a failing valve.
Symptoms:
● Sluggish digging or lifting
● Delayed response from controls
● Inconsistent movement under load
Fix:
● Test the hydraulic pressure using diagnostic tools
● Rebuild or replace faulty valves or cylinders
● Ensure the main relief valve is correctly adjusted
These issues are best resolved by certified technicians using factory specifications.
Prevention is Better Than Cure
The best way to avoid these hydraulic headaches is through regular maintenance and inspections. Operators should perform daily visual checks and log any performance changes immediately.
Toyota Takeuchi offers tailored maintenance plans and genuine Takeuchi excavator parts to ensure every machine in your fleet continues operating at peak performance. By following manufacturer service intervals and using OEM fluids and components, you can protect your investment and minimise downtime.
Support You Can Count On
If you suspect any issues with your Takeuchi excavator, contact your nearest Toyota Material Handling Australia authorised service centre. Toyota Takeuchi’s expert technicians are trained to diagnose and fix hydraulic faults efficiently, using genuine parts and advanced diagnostics. Whether you're maintaining a mini excavator for residential projects or a larger unit for commercial use, we provide reliable support across Australia.
