Excavator Hydraulic System Leaking Oil
Seal Hydraulic Leaks Yourself
If your excavator’s hydraulic system is leaking oil or hydraulic lines and cylinders are covered with oil, the cause is usually aged or hardened seals. Under pressure and temperature, these seals lose their sealing ability over time. With LecWec, you can restore the sealing effect directly during operation without immediately dismantling the hydraulic system.
✓Oil leak stop for leaking hydraulic systems
✓Long-lasting sealing effect for many years
✓Oil sealing additive without chlorine
✓No dismantling or disassembly required
How LecWec Works in Excavator Hydraulic Systems
Excavator hydraulic systems use polymer seals in cylinders, valves and hydraulic lines to keep the hydraulic oil inside the system under high pressure. Due to continuous heavy loads, temperature changes and aging, these seals lose elasticity over time. The result: oil begins leaking from piston rods, fittings or housing connections. This is exactly where LecWec works during normal operation.
After being added, LecWec distributes completely throughout the hydraulic oil and reaches all sealing points inside the system. The active ingredients are absorbed by the seals and help the material become flexible, supple and tightly sealing once again. This closes the fine gaps between the seal and the metal surface, even under pressure.
In practical use, this means that oil leaks from cylinders, valves or hydraulic lines are greatly reduced or stopped completely. LecWec restores the sealing function of the existing components without dismantling the hydraulic system or taking the excavator out of service.
Only 3% of the total oil quantity.
LecWec is chlorine-free.
For all oil systems and types.
Direct delivery from the manufacturer.
It happened even faster than I expected.
"I have to report positively that the level matches the oil... unbelievable. [...] I wouldn’t have believed that the steering gearbox would be sealed again after just under a week."
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"...nothing was leaking anymore!!!
I am truly very satisfied. At first, I did not believe the product would work, but now I am completely convinced and also saved many hundreds of euros!"
- Jürgen R.
Oil leak at the cylinder base gasket
Verified review (Learn more)"I did not believe it at first, but your product is excellent! [...] I ordered just one can and everything is sealed already, even though you recommend 2 cans, meaning 200 ml, for 6 liters of oil. Many thanks!"
- Andreas F.
Oil leak problems at the oil flange gasket
Verified review (Learn more)"...which made it even more satisfying when, after around 3 weeks, I noticed that the oil loss had gone down to zero – the steering rack was sealed again!! Even now, after 4 months, the reservoir is still at the maximum level."
- Friedger F.
Oil leak at the steering rack
Verified review (Learn more)"There was always a small puddle of oil collecting underneath the vehicle. I added 100 ml of LecWec to around 4 liters of oil. Since then, I have driven many miles and was surprised to find that there was no more oil on the ground at all."
- Paul R.
Leak at the oil pan
Verified review (Learn more)
How to Seal an Excavator Hydraulic System in 3 Steps
If your hydraulic system is leaking oil, this is usually noticeable through oil-moist cylinders, oil drops at hydraulic lines, or a loss of system pressure. The cause is usually aged polymer seals that have lost their sealing performance. Instead of replacing hydraulic lines or dismantling cylinders immediately, you can address the issue directly within the system.
Step 1: Check the hydraulic oil level and determine the exact oil volume within the system.
Step 2: Add LecWec directly to the hydraulic reservoir at a ratio of 3% of the total oil volume.
Step 3: Operate the machine normally – the additive will circulate throughout the entire hydraulic system.
The seals absorb the active formula, become flexible again, and fit tightly against the sealing surfaces once more. This stops oil leaks at the affected areas. You avoid downtime and restore your hydraulic system to a sealed and fully operational condition quickly.
Excavator Hydraulic System Leaking Oil? These 5 Tips Can Help
Identify the leak location clearly
Clean cylinders, hydraulic lines, and fittings thoroughly. Operate the hydraulic system and observe exactly where the oil is leaking. This helps avoid unnecessary disassembly.
Check pressure and operating load
Excessive pressure or incorrect settings place additional stress on seals. Check the system parameters and make sure the hydraulic system operates within the specified range.
Inspect piston rods and sealing surfaces
Damage, dirt, or corrosion on piston rods can lead to leaks. A clean and smooth surface is essential for proper sealing performance.
Restore seals directly
Hydraulic systems use polymer seals that harden over time. Through targeted treatment within the system, their elasticity can be restored.
Use LecWec correctly and check the results
Add LecWec to the system at a ratio of 3% of the total oil volume and continue operating the machine normally. Afterwards, check the sealing performance. In many cases, the oil leak is significantly reduced or completely stopped.