COGENG Komatsu 707-98-42150 | Premium Hydraulic Service Seal Kit

Technical Constants & Performance Data

Exact Model Compatibility

Component Specifications Table

Specific Components Included

• Complete seal set matching OEM configuration

• All dynamic and static seals as specified

• Piston seal(s) – Qty: As per OEM design

• Rod seal(s) – Qty: As per OEM design

• Wiper/scraper(s) – Qty: As per OEM design

• Buffer seal(s) – Qty: As per OEM design

• Wear ring(s)/guide band(s) – Qty: As required

• Dust seal(s) – Qty: As required

• Complete O-ring and backup ring set – Qty: 1 Set

• Note: Kit contents are configured to exactly match the component list and arrangement of the original Komatsu 707-98-42150 kit. Each kit is carefully packaged by cylinder type and labeled with model compatibility -1.
  
  
  

Support Seals & Hardware

• Full complement of seals for complete cylinder rebuild

• All required O-rings and backup rings for gland and port assembly

• Multi-layer protection system ensuring longer equipment uptime and reduced risk of hydraulic failure -1

• Excluded Items: This kit contains seal components only. Piston, rod, barrel, gland, bearings, bolts, and other metal parts are not included.

Installation decomposition diagram

1. Application Verification: Confirm 707-98-42150 is the correct part number for your specific machine model and cylinder type using official Komatsu documentation.

2. System Depressurization: Completely relieve all hydraulic pressure before disassembly. Park equipment on level ground and lower all implements fully.

3. Clean Work Environment: Maintain meticulous cleanliness throughout the repair process. Hydraulic system contamination is a primary cause of seal failure -1.

4. Documented Disassembly: Carefully disassemble the cylinder. Photograph and note the exact order and orientation of all components, especially the seal stack in the gland.

5. Component Inspection: Thoroughly inspect all metal components (rod, bore, piston) for wear, scoring, or damage. New seals cannot compensate for worn or damaged metal surfaces.

6. Proper Installation: Use correct tools and techniques to prevent seal damage during assembly. Lubricate all seals with clean hydraulic fluid before installation.

7. Torque Compliance: Follow OEM torque specifications for all fasteners.

8. System Testing: Perform appropriate pressure testing before returning to service to validate seal integrity -1.
   
   
   
   

Critical Specific Warnings

• APPLICATION VERIFICATION REQUIRED: This kit is designed for specific applications where Komatsu part number 707-98-42150 is specified. Always use the full part number for cross-reference. Using it on incompatible equipment will cause failure.

• METAL SURFACE CONDITION: This seal kit cannot compensate for worn or damaged cylinder components. Ensure all metal surfaces are within serviceable limits before installation.

• CONTAMINATION CONTROL: Even microscopic debris introduced during assembly will act as an abrasive, destroying new seals. Maintain absolute cleanliness during installation -1.

• PRESSURE SAFETY: Always ensure complete system depressurization before beginning any repair work.
  
  
  

Compatibility & Application Data

Maintenance Best Practices:

• Regular Inspections: Frequently check cylinder rods for scratches, pitting, or signs of leakage

• Timely Replacement: Replace worn seals promptly to prevent contamination of the entire hydraulic system

• Fluid Quality: Use clean hydraulic fluid meeting Komatsu specifications to prolong seal life

• Operating Conditions: Monitor pressures and temperatures to prevent extremes that could affect seal performance

Disclaimer: This product is manufactured as an OEM-equivalent replacement part. All manufacturer names, part numbers, and descriptions are used for reference purposes only. COGENG is not affiliated with Komatsu Ltd. For specific application details and installation procedures, always consult the original Komatsu equipment documentation. Specifications subject to change without notice