7X-2783 Hydraulic Cylinder Seal Kit 7X2783 for Caterpillar Excavator Backhoe Loader CAT 120G 120H 130G 140G 160H 416C 426C 428B
7X-2783 Hydraulic Cylinder Seal Kit – OEM-Compliant Seals for Construction Equipment, Fits Caterpillar 120g 120h 12g 130g 135h 140g 140h 143h 14e 14g 14h 160g 160h 163h 416c 426 426b 426c 428 428b 428c 436 438c 613b 615c
Product Overview
The 7X-2783 Hydraulic Cylinder Seal Kit is a precision-engineered sealing solution designed for hydraulic cylinders in excavators, loaders, and other construction machinery. This kit restores cylinder performance by preventing leaks and contamination, ensuring reliable operation under standard earthmoving and material handling conditions.
Technical Specifications
| Parameter | Specification |
|---|---|
| Compatible Equipment | Excavators , Loaders |
| Pressure Range | 0–25 MPa (3,625 PSI) |
| Temperature Tolerance | -20°C to +100°C (-4°F to +212°F) |
| Dynamic Seals Material | High-Grade 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-Impregnated 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) | Seals pressure between cylinder chambers during operation. |
| 2. Rod Seal (Double-Lip) | Prevents external leaks and debris ingress in dusty environments. |
| 3. Wiper Seal (NBR) | Removes dirt and grit from the piston rod during retraction. |
| 4. Guide Rings | Reduces friction between piston and cylinder wall for smooth movement. |
| 5. O-Rings | Static sealing for cylinder ports and end caps. |
| 6. Backup Rings | Protects primary seals from extrusion under pressure cycles. |
Key Features & Benefits
✅ OEM-Compatible Design: Precision-machined to match CAT 320 and Komatsu PC200 specifications.
✅ Durable Construction: NBR material withstands frequent digging and loading cycles.
✅ Complete Repair Solution: Includes all seals needed for full cylinder overhaul.
✅ Cost-Effective: Reduces downtime by extending hydraulic cylinder lifespan.
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