COGENG KOMATSU 707-98-56640 7079856640 Cylinder KomatsuSeal Kit WA200-6 WA200-7

PRODUCT IDENTIFICATION

CROSS REFERENCE GUIDE

Material Specifications

Technical Constants & Performance Data

Exact Model Compatibility

Component Specifications Table

Installation decomposition diagram

• Application Verification: Confirm 707-98-56640 is the correct part number for your specific cylinder application on the WA200-6 or WA200-7 using official Komatsu documentation.
• System Depressurization: Park the loader on level ground. Lower the bucket fully to relieve all hydraulic pressure. Engage the parking brake and block the wheels securely.
• Clean Work Environment: Maintain meticulous cleanliness throughout the repair process. Loader cylinders operate in dusty environments; contamination control is essential.
• Documented Disassembly: Carefully disassemble the cylinder. Photograph and note the exact order and orientation of all components, especially the seal stack in the gland.
• Critical Metal Inspection: Inspect the cylinder rod for scratches, gouges, or corrosion. Check the cylinder bore (ID) for scoring, pitting, or excessive wear. Damaged metal components MUST be reconditioned or replaced prior to seal installation.
• Lubricated Assembly: Soak all new elastomeric seals in clean hydraulic fluid. Lightly lubricate all seal grooves and sliding surfaces before installing new seals.
• Proper Tool Use: Use seal installation tools (cone tools, picks, sleeves) to carefully install seals without cutting, stretching, or rolling them over sharp edges.
• Torque to Specification: During reassembly, use a calibrated torque wrench. Adhere strictly to Komatsu's specified torque values and sequences for gland bolts or end caps.
• System Testing: After assembly, perform a controlled pressure test to validate seal integrity before returning the machine to service.
  Critical Specific Warnings

• MODEL-SPECIFIC APPLICATION: This kit is designed for Komatsu WA200-6 and WA200-7 wheel loaders. The specific cylinder type (lift, bucket, or steering) must be verified before use. Do not use on other loader models without verification.

• CYLINDER VERIFICATION REQUIRED: The part number 707-98-56640 may apply to different cylinders depending on the machine configuration. Always confirm the exact cylinder application using the Komatsu parts catalog.

• METAL SURFACE CONDITION: This kit seals fluid between precision metal surfaces. It CANNOT repair a scored rod or a worn cylinder bore. Installation on damaged components will result in immediate, severe leakage.

• CONTAMINATION CONTROL: Loader cylinders are exposed to significant dust and debris. Absolute cleanliness during assembly is non-negotiable to prevent premature seal failure.

• LOAD SUPPORT HAZARD: The bucket and lift arms must be fully lowered and supported. Never work on a cylinder that is under load or hydraulic pressure.

Compatibility & Application Data