Wiper AY
AY wipers are protective seals with a compact and durable profile for the hydraulic cylinders of heavy construction machinery — excavators, bulldozers, telescopic boom cranes. Designed for high vibrations, mechanical impacts, and constant exposure to coarse dust, mud, and stones typical of construction sites, where an ordinary wiper fails within a few weeks. Standard dimensions and material variants are available at hydsealstore.ro, with compatibility tables for the main machinery brands.
Specific Features and Role of AY Wipers in Hydraulics
Made predominantly of polyurethane, with NBR variants for higher temperatures or special fluids. The profile ensures maximum and uniform contact around the entire circumference of the rod, even under conditions of vibration and lateral rod movements caused by the machinery impacting the ground — a common situation with excavators when the boom hits obstacles. Resistance to permanent deformation of the lip is the main characteristic of this series. They operate between -30°C and +100°C. The dimensions comply with European ISO and DIN standards — directly replaceable on the main machinery brands on the European market, without machining. The other sealing components of the cylinder are available in the range of hydraulic seals.
Advantages of Using AY Wipers in Heavy Machinery
AY is found in 20-50 ton excavators on civil and industrial construction sites, in bulldozers and motor graders with constant exposure to coarse dust and stones, in telescopic boom cranes, and in mobile cranes with hydraulic extension systems. The compact profile and resistance to direct mechanical impacts make AY the optimal choice for construction machinery with intensive operating schedules. The price difference compared to a standard wiper is small, while the extended service life quickly justifies the choice, especially on rented machinery where visible wear affects its value. Other profiles available for heavy machinery are in the range of hydraulic wipers.
Guide to Proper Selection and Installation of AY Wipers
Choose polyurethane for standard construction site conditions or NBR if the temperature frequently exceeds +80°C or if the fluid is not compatible with PU. Check the technical data sheet for special fluids. The groove must be thoroughly cleaned and inspected for burrs and traces of rust. The lip must face outward, with care during insertion. Preventive replacement during every overhaul, regardless of visual condition — on heavy machinery, microscopic wear is enough to allow particles to pass through, which then destroy the internal seal. Compatible rod seals are available in hydraulic seals.
Advantages of Purchasing AY Wipers
For construction machinery operating in difficult conditions, the wiper plays the role of preventing contaminants from reaching the internal cylinder seals. At Hydraulic Seals Store, you can find AY wipers for such applications, with a compact profile and material variants adapted to operating conditions.
Before selection, the rod diameter and installation groove must be checked, while the material is determined according to temperature and fluid. For machinery constantly exposed to dust, mud, and mechanical loads, it is important that the profile is suitable for the respective environment. If you need help with identification, our team can check the dimensions of the AY wiper.