Fendt Farmer Hydraulic System Leaking Oil
Seal Oil Leaks Effectively During Operation
With Fendt Farmer models, oil-moist control units, dripping hydraulic connections, or pressure loss within the system are a well-known issue. Typical causes include O-rings, shaft seals, control units, or lift cylinders. In particular, rubber and polymer seals lose their elasticity over time due to aging, pressure, and temperature and no longer provide a proper seal.
With LecWec, you can restore the functionality of these seals directly during operation without dismantling control units, the hydraulic lift, or hydraulic lines.
✓Oil Stop Leak for Fendt Farmer hydraulic systems
✓Targets O-rings and shaft seals specifically
✓Oil sealant without chlorine
✓Seal leaks without removal or downtime
How LecWec Works in Fendt Farmer Hydraulic Systems
In the hydraulic systems of Fendt Farmer series tractors, polymer seals such as O-rings, shaft seals, and sealing lips are used in control units, hydraulic blocks, and lift cylinders. Due to decades of operation, pressure peaks, and temperature, these seals lose their plasticizers over time. They become hard, shrink, and lose their sealing performance. This is exactly where LecWec takes effect during normal operation.
After being added, LecWec circulates through the hydraulic oil and reaches all relevant sealing points within the system – including internal areas inside the control block or regulating valve. The active formula is absorbed by the polymer seals and helps restore their original properties. The material becomes flexible again and fits tightly against the sealing surfaces. This closes the typical leakage gaps.
In practical use, this means that oil loss is significantly reduced or stopped, provided the cause is aged seals. Mechanically damaged components or worn piston rods remain unaffected.
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 a Fendt Farmer Hydraulic System in 3 Steps
If your hydraulic system is leaking oil, this is usually noticeable through oil-moist control units, oil drops at hydraulic lines, or reduced lifting power. In many cases, aged O-rings or shaft seals inside the system are the cause. Instead of dismantling components immediately, you can address the issue directly within the system.
Step 1: Check the hydraulic oil level and roughly identify the leak location (for example control unit, hydraulic lift, or connections).
Step 2: Add LecWec directly to the hydraulic oil at a ratio of 3% of the total oil volume.
Step 3: Operate the tractor normally – activate the hydraulic functions multiple times so the additive circulates throughout the entire system.
The polymer seals absorb the active formula, become flexible again, and fit tightly against the sealing surfaces once more. This reduces or stops oil leaks at typical Farmer weak points. You avoid unnecessary disassembly and keep the tractor fully operational.
Fendt Farmer hydraulic leak? These 5 tips can help
Check typical Farmer leak points
Control valves, lift cylinders, and threaded connections are among the most common causes. Clean the hydraulic system thoroughly and observe it during operation.
Consider hydraulic pressure
Continuous heavy loads or pressure spikes place additional stress on seals. Check operating conditions and hydraulic settings.
Inspect control valves and hydraulic regulation system
Leaks often occur around valve blocks or regulation valves. Inspect these areas carefully.
Regenerate seals specifically
The Fendt Farmer hydraulic system uses many O-rings and radial shaft seals that harden over time. This is exactly where LecWec can restore sealing performance.
Use LecWec correctly and monitor the results
Add LecWec at 3% of the oil volume and continue operating the hydraulic system normally. Then monitor all sealing points. In many cases, the oil leak is significantly reduced or completely stopped.