25632396 Daewoo Doosan DH215 main control valve UX28

This high-precision heavy-duty multi way control valve assembly (main distribution valve/distributor) has a core original part number of 25632396 and is based on the classic UX28 valve type precision manufacturing. This assembly serves as the core center for fluid power distribution and logic control, specifically designed for the main hydraulic excavator of Doosan Daewoo. It is widely matched with 20 to 30 ton gold generation core models such as DH215, DH220, DH225-5/-7, and DH300-5/-7/-9. The product is based on first principles optimization of internal flow channels, perfectly carrying high-pressure flow loads under frequent composite actions, ensuring absolute certainty of action response. The physical dimensions of the product packaging are approximately 710mm × 490mm × 530mm, with an overall net weight of approximately 158kg. The original factory standard position is precisely aligned.

"Extreme error prevention and dust-free (core pit avoidance): The unpacking and installation environment needs to be treated with noise reduction and dust removal. The distribution of the main valve pipelines in Doushan Daewoo is complex and intricate. When disassembling, each conduit and high-pressure oil pipe must be rigidly numbered and marked, and it is strictly prohibited to connect them in a staggered manner to prevent system logic disorder or reverse breakdown of internal seals.

Symmetrical tightening of torque: The installation bolts of the valve body and high-pressure flange bolts must be tightened in stages and symmetrically cross tightened strictly according to the original factory's specified torque using a torque wrench to prevent slight deformation of the cast iron valve body and blockage of the valve core caused by uneven local stress.

Low pressure full stroke exhaust: After installation, the engine must be kept idling for 15 minutes for the first ignition. Subsequently, control the working device to perform several full stroke slow reciprocating movements, thoroughly exhaust the air inside the circuit, and confirm that the thermodynamic state is stable before gradually applying the work load."