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The Orbital Steering Unit is a precise hydraulic system designed to convert linear hydraulic oil movement into rotational motion of the steering shaft. This unit is commonly used in heavy machinery, tractors, and combines, and can handle operating pressures between 180 and 250 bar. Its internal design includes multi-channel pistons, control valves, and housings with tolerances below 0.05 millimeters, enabling force transmission with minimal friction and leakage.
The mounting location of the orbital steering unit is usually on the input shaft of the steering system, near the hydraulic pump. This position allows the unit to receive direct hydraulic pressure and transmit precise motion to the output steering shaft. Pressure and return lines are connected with high-pressure-resistant O-rings and flange couplings. Any leakage or misalignment at this point can cause increased vibration, reduced steering precision, and premature bearing wear.
The repair process for an orbital steering unit involves disassembling the unit, inspecting piston wear, valves, and housing, and measuring tolerances with a digital micrometer. If cracks or wear greater than 0.05 millimeters are detected, component replacement is mandatory. After reassembly, the unit must be tested on a hydraulic bench at 200 bar operating pressure and specified oil flow to verify steering accuracy and eliminate leaks. This process ensures stable and reliable steering performance under demanding operating conditions.
WEBSITE: orbital steering unit repair Iran
