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KMX15RA Construction Machinery Hydraulic Main Control Valve Komatsu Main Control Valve

KMX15RA Construction Machinery Hydraulic Main Control Valve Komatsu Main Control Valve

KMX15RA

Construction Machinery Hydraulic Main Control Valve

Construction Machinery Komatsu Main Control Valve

Place of Origin:

China

Model Number:

KMX15RA

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Product Details
Selling Units:
Single Item
Model:
KMX15RA
Color:
Black
Delivery:
5-35 Days
Application:
Excavator KMX15RA
Catalog:
Excavator Hydraulic Parts
Highlight:

KMX15RA

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Construction Machinery Hydraulic Main Control Valve

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Construction Machinery Komatsu Main Control Valve

Payment & Shipping Terms
Minimum Order Quantity
1 Pc
Packaging Details
Carton
Delivery Time
5-35 days
Payment Terms
T/T
Product Description

KMX15RA Hydraulic Main Control Valve Komatsu Excavator Parts Hydraulic Distributor Valve Construction Machinery

    • Sluggish or weak operation: Low main relief pressure, worn spools with internal leakage, sticking LS or negative‑flow valves. Measure system pressure, inspect spools after disassembly, clean valve assemblies.
    • Unstable/jerky actions: Scuffed spools, fatigued springs, variable pilot pressure. Replace or grind spools and springs, calibrate pilot pressure properly.
    • Oil leakage failures: Worn seals, valve body cracks. Change sealing elements; repair cracks via welding or replace valve body.
    • Poor coordination of compound motions: Jammed merging valves, faulty load check valves. Clean combining valves and verify check‑valve tightness.
      The excavator main control valve, also known as main valve or multi‑way valve, functions as the hydraulic system’s main switch and flow divider manifold. It oversees all core machine motions such as boom lifting, arm retraction, bucket digging, slewing and bidirectional traveling.

      Functions

      It receives high‑pressure hydraulic oil supplied by the main pump unit.When the operator shifts the control lever, pilot oil pushes each internal spool of the valve.
      High‑pressure oil is precisely allocated to respective executive units:
      Boom cylinder – boom up/down motion
      Arm cylinder – arm in‑and‑out movement
      Bucket cylinder – bucket opening/closing
      Swing motor – upper body rotation
      Travel motor – forward/reverse chassis travel

      Common Faults & Troubleshooting

    Acting as the hydraulic flow distribution center, the main control valve precisely distributes main‑pump high‑pressure oil to boom, arm, bucket, swing and travel actuators, governing movement direction, speed and multi‑action synchronization.
Machinery Test Report Provided Warranty 3 Months
Video outgoing-inspection Provided Brand Name OEM
Place of Origin China Model Number KMX15RA
Product Name MAIN VALVE MOQ 1 Piece
Quality Tested Great Performance Application Excavator
Delivery Time 7-35 Days Service Professsional Service
Condition Brand New Packing Standard Packing

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