Bulldozer Komatsu D375-3 D375-5 Main Control Valve (Multi-way Distributor)
Part Numbers: 709-63-11600, 709-63-11601, 709-63-11500
Procurement Guidelines
Verify OEM Part Number: Confirm valve assembly compatibility with complete blade and ripper spool sections.
Quality Documentation: New or remanufactured valves must include hydraulic bench test reports covering pressure, flow, and internal leakage for each section.
Remanufacturing Standards: Ensure spools are either new or honed and repaired. All O-rings, relief valves, check valves, and pressure compensators must be replaced.
Initial Inspection: Check valve block for casting cracks upon arrival. Maintain port protection to prevent contaminants from entering valve cavity.
Transportation Safety: Secure valve properly during transit to prevent impact damage to ports and precision spools.
Installation Preparation: Clean hydraulic tank and pipelines before installation. Replace all hydraulic filters and bleed air from the circuit.
Post-Installation Testing: Test blade lift/tilt, ripper operation, cylinder drift, and system relief pressure after installation.