Komatsu PC55MR-3 Excavator Main Control Valve 723-18-18200

This high-precision multi way control valve assembly (main distribution valve/distributor) has core original part numbers and iterative cross index numbers 723-18-18200 and 723-18-18201. This assembly serves as the core control center for fluid power distribution and micro control logic of the entire machine, specially designed for Komatsu's classic compact hydraulic excavator, perfectly matching 5-ton core flagship micro excavator models such as the PC55MR-3 series. The product is based on first principles for high-precision optimization of agile flow channels and induction valve cores, perfectly matching the unique multi action composite fine operation of Komatsu's micro excavator, ensuring absolute control certainty. The physical dimensions of the product packaging are approximately 450mm × 310mm × 320mm, with an overall net weight of approximately 41kg. The original factory standard position is precisely aligned.

"Extreme error prevention and dust-free (core pit avoidance): The internal assembly space of the small excavation is extremely compact. Before disassembling the main valve, each complex conduit and main oil pipe must be hard marked and numbered, and it is strictly prohibited to connect them in a staggered manner to prevent the reversal of action logic or local instantaneous high pressure reverse breakdown of the internal seal.

Symmetrical tightening of torque: The bolts of the valve body base and various 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 bending deformation of the cast iron valve body and valve core jamming 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 10-15 minutes. Subsequently, control the boom and arm to perform several slow, full stroke reciprocating actions, thoroughly purge the circuit bubbles, and confirm the thermodynamic stability before applying the rated working load."