Volvo EC210B EC240B excavator main valve VOE14576336 control valve UX28 valve

This high-precision medium-sized multi way control valve assembly (UX28 type distribution valve/main hydraulic valve) has the Volvo original core part number VOE14576336. As the core control center for precise distribution of high-pressure fluid power and composite action logic of the entire machine, this assembly is specially designed for Volvo's medium-sized hydraulic excavators, accurately matching core flagship models such as EC210B, EC210B Prime, and EC240B in the 21 to 24 ton industry. The product is based on first principles optimization of the large flow channel and pilot slide valve response inside the UX28 valve body, perfectly bearing the flow load under high-frequency earthwork, rock excavation, and composite actions, ensuring absolute certainty of control response. The physical dimensions of the product packaging are approximately 680mm × 410mm × 450mm, with an overall net weight of approximately 135kg. The original factory standard position is precisely aligned.

"Extreme error prevention and dust-free (core pit avoidance): The lifting environment needs to be treated with noise reduction and dust removal. The pilot signal pipeline of Volvo's medium-sized main valve is complex and intricate. When disassembling, each pipeline must be numbered and marked with a hard number. It is strictly prohibited to connect them in a staggered manner to prevent logical disorder or local high pressure reverse breakdown of the internal pilot valve core.

Symmetrical tightening with torque: The installation bolts of the valve body and the flange bolts of the high-pressure oil pipe must be tightened in multiple stages and symmetrically in accordance with the original torque standard using a torque wrench to prevent slight deformation of the heavy-duty cast iron valve body and blockage of the valve core caused by excessive unilateral stress.

Low pressure full stroke exhaust: After installation, the first ignition must keep the engine idling and running at low pressure for 15-20 minutes for full system automatic exhaust. Subsequently, control the working device to perform several slow and full stroke reciprocating actions, confirm the thermodynamic state is stable and there are no bubbles or abnormal noises before gradually applying the rated working load."