111-3302 Steering Swing Hydraulic Cylinder Seal Kit 1113302 for Backhoe Loader Excavator CAT 416C/416D/420D/428D/432D/416F/432E/442E/420E/434E/422E/444E/428E/420F/430E/426B/426C/428B/428C/432C, Dozer D5H/D5TSKH/D6M
111-3302 Hydraulic Cylinder Seal Kit – OEM-Compliant Seals for Excavators and Loaders
Product Overview
The 111-3302 Hydraulic Cylinder Seal Kit is a precision-engineered sealing solution designed for hydraulic cylinders in excavators, wheel loaders, and similar construction equipment. This kit provides reliable leak prevention and restores hydraulic performance under standard operating pressures, ensuring durability in earthmoving, digging, and material-handling applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Compatible Equipment | Excavators (CAT 320, Komatsu PC200), Loaders (Volvo L150, John Deere 624) |
| Pressure Range | 0–25 MPa (3,625 PSI) |
| Temperature Tolerance | -20°C to +100°C (-4°F to +212°F) |
| Dynamic Seals Material | High-Performance Nitrile Rubber (NBR) – Resists abrasion from soil and debris |
| Static Seals Material | NBR O-Rings – Compatible with ISO VG 46/68 hydraulic oils |
| Guide Components | PTFE-Reinforced Nylon – Low friction, extended wear life |
| Certifications | ISO 9001 (Quality Management System) |
| Compatibility | Boom/Arm/Bucket Cylinders, Lift/Tilt Systems |
Kit Components & Functions
| Component | Function |
|---|---|
| 1. Piston Seal (NBR U-Cup) | Maintains pressure integrity between hydraulic cylinder chambers. |
| 2. Rod Seal (Double-Lip) | Prevents external leaks and contamination in dusty or wet environments. |
| 3. Wiper Seal (NBR) | Removes debris from the piston rod during retraction. |
| 4. Guide Rings | Reduces metal-to-metal friction for smooth piston movement. |
| 5. O-Rings | Static sealing for cylinder ports and end caps. |
| 6. Backup Rings | Protects primary seals from extrusion under pressure spikes. |
Key Features & Benefits
✅ OEM-Compatible Design: Precision-machined to match CAT 320 and Komatsu PC200 specifications.
✅ Durable Performance: NBR seals withstand frequent digging and loading cycles.
✅ Complete Repair Solution: Includes all components for full cylinder overhaul.
✅ Cost Savings: Reduces downtime by extending cylinder lifespan (1/3 the cost of OEM replacements).
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