-
- About Us
- Cooperation
- News
- Offer
- E-shop
- Contact
- TRACK FINDER
- WYSZUKIWARKA SZYB
- Kategorie produktowe
-
ALL CATEGORIES
-
-
-
-
-
-
SLEW SYSTEM
-
-
-
-
-
AXLES
- TIE RODS
- KIT SPIDER FOR DRIVE SHAFTS
- DIFFERENTIAL
- MOUNT THE KNUCKLE
- KIT SPIDER FOR AXLE SHAFTS
- HUB / GEAR REDUCTION
- PROPSHAFTS
- SOLENOID VALVES / COILS
- FLANGES / COUPLING YOKES
- BEARINGS
- BUSHES / WASHERS MOUNT AXLE
- AXLE / DIFFERENTIAL HOUSING
- DRIVESHAFTS / CENTER JOINTS
- BOLTS / NUTS / STRAPS
- LOCK / CIRCLIP / CLIP
- CROWN WHEEL AND PINIONS
- SEALS
- OTHERS
-
-
-
-
-
-
-
-
ENGINE
-
-
-
-
-
COILS / SOLENOID VALVES
-
SWIVELS / TURNING JOINTS
-
PUMPS / STEERING VALVES / MOTORS
-
-
-
VALVES
-
HYDRAULIC HOSES / PIPES
-
RAMS
-
ACCUMULATORS
-
QUICKHITCHES
-
-
-
BOLTS / NUTS / WASHERS
-
PUMP DRIVESHAFTS
-
SEALS VALVES / PUMPS
-
OTHERS
-
-
-
-
-
-
-
TIMING
-
EQUIPMENT
-
-
LUBRICATION SYSTEM
-
-
INDUCTION / EXHAUST SYSTEM
-
SEALS / GASKET SETS
-
ENGINE MOUNTING
-
SERVICE TOOLS
-
-
-
-
-
-
STABILIZERS
-
-
-
-
-
-
FUSES / FUSE BOXES
-
RELAYS / FLASHERS
-
REVERSE ALARM
-
-
HEATERS / BLOWERS
-
BATTERY ISOLATER SWITCH
-
-
-
-
-
OILS
-
FLUIDS
-
-
-
PAINTS
-
-
-
-
-
-
-
GLASS / CAB GLAZING
-
-
-
RUBBER SEALS - GLASS
-
ASSEMBLY KITS / ADHESIVES
-
-
-
-
-
ADAPTERS
-
BOLTS / LOCKS
-
-
-
-
HYDRAULIC INSTALLATIONS
-
TOEPLATES
-
TOOTH RIPPER
-
-
-
HYDRAULIC HAMMERS / TOOLS
-
PLOWS
-
QUICKHITCHES
-
FORKS
-
-
-
EARTH DRILL / AUGER
-
SWEEPER / COMPONENTS
-
SWINGOTILT / PLATFORMS
-
-
-
-
-
ACCESSORIES
-
DECAL / STICKERS
-
-
-
GADGETS
-
CLOTHES
-
FAN ZONE
-
-
-
- SPARE PARTS SUITABLE FOR
- JCB
- CAT
- VOLVO
- KOMATSU
- CASE
- NEW HOLLAND
Hydraulic Cylinders: Construction, Seals, and Causes of Leaks | A Complete Guide
Hydraulic Cylinders: Construction, Seals, and Causes of Leaks
The Real Muscles of Your Machine
The powerful arm of a Caterpillar excavator lifting tons of earth, the precise grab of a JCB telehandler, or the blade of a Komatsu dozer. What do all these actions have in common? Hydraulic cylinders – the real muscles of every construction machine, which convert oil pressure into immense force. A leaking cylinder is not just a cosmetic issue. It means a loss of power, money, and is a potential environmental hazard. Understanding their construction and the causes of failure is key to effective repair.
Anatomy of a Hydraulic Cylinder
Although cylinders vary in size, their construction is very similar. The key components are:
- Cylinder Barrel: The main outer tube, which withstands immense pressure.
- Piston Rod: The perfectly smooth, chrome-plated rod that extends from the cylinder. Its surface is crucial for the lifespan of the seals.
- Piston: Attached to the end of the rod inside the cylinder. The oil pushes against it to create movement.
- Gland (or Head): The "cap" that closes the cylinder and through which the rod moves. This is where the most important seal package is located.
The World of Seals – The Unseen Heroes
A cylinder repair kit is not just one gasket. It's a system of precisely selected components, each with a different job:
- Wiper Seal: The first line of defense. This is the outermost seal on the gland that scrapes dirt, dust, and water off the piston rod as it retracts. Without it, contaminants would be pulled inside, destroying the entire cylinder.
- Rod Seal: The most important external seal. It prevents oil from leaking out of the cylinder along the rod. Its failure causes visible "sweating" or dripping of oil.
- Wear/Guide Rings: Located on both the piston and in the gland. They prevent metal-to-metal contact (piston-to-barrel, rod-to-gland) and keep these components perfectly aligned. Their wear causes side-loading and rapid destruction of the main seals.
- Piston Seal: Maintains pressure on one side of the piston, preventing internal leaks. Its failure causes "boom drift" and a drastic loss of power.
The quality of all these elements is key. That's why seal kits from reputable brands, such as VICORTEX, contain all the necessary components made from the highest quality materials, resistant to pressure and temperature.
Main Causes of Cylinder Leaks and Failures
- Mechanical Damage to the Piston Rod: This is enemy number one. Any scratch, dent, or spot of rust on the chrome-plated surface acts like a knife, destroying the delicate rod seal with every stroke.
- Contaminated Hydraulic Oil: Metal or sand particles in the oil act like liquid sandpaper, destroying seals from the inside. This is why regular replacement of hydraulic filters, such as REDX filters, is so important.
- Worn Guide Rings: When they wear out, the piston and rod become misaligned. This side-loading puts uneven pressure on the seals, causing them to fail prematurely.
- Natural Wear and Tear: After thousands of work cycles, the seal material simply ages, hardens, and loses its properties.
Noticed a leak from a cylinder in your JCB 3CX, Volvo, or Case machine? Don't wait for the problem to get worse!
Even a small "sweat" on the piston rod is a sign that the seals need replacing. Our offer includes professional cylinder repair kits from the VICORTEX brand, which contain all the necessary seals and guide rings. Contact us, and our experts will help you choose the perfect kit for your machine and restore its full power!
Related posts
WE OFFER PRODUCTS OF THE BEST BRANDS


















ul. Podkarpacka 57A, 35-082 Rzeszów
NIP: 813-352-97-49 REGON: 180286726
Opening hours
Telephone support - Monday - Friday (8:00 AM – 5:00 PM)
Order pick-up - Monday - Friday (8:00 AM – 4:30 PM)
[email protected]
[email protected]
Gadu-Gadu communicator
GG: 4185846 - Daniel
+48 17 864 31 00
+48 17 864 00 24
+48 17 864 25 96
Mobile phone
+48 607-700-547
+48 695-944-818
+48 691-330-531
+48 690-906-751
Fax
+48 17 864 31 20
