244-2067 Hydraulic Cylinder Seal Kit 2442067 for Caterpillar Bulldozer TRACK-TYPE TRACTOR D8T 8D D8R D8R II D8N D8 GC D8 Dozer
244-2067 Hydraulic Cylinder Seal Kit for Caterpillar D8T/D8R/D8N/D8 GC Dozers – OEM-Compliant Track-Type Tractor Seals
Product Overview
The 244-2067 Seal Kit is a genuine repair solution designed for the hydraulic cylinders of Caterpillar® track-type tractors, including D8T, D8R II, D8N, D8 GC, and legacy D8 models. This kit restores factory sealing performance in critical applications such as blade lift, tilt cylinders, and ripper control systems, ensuring leak-free operation in heavy-duty earthmoving and mining operations.
Technical Specifications
| Parameter | Specification |
|---|---|
| Compatible Models | Cat D8T, D8R, D8R II, D8N, D8 GC, D8, 8D(S/N prefixes: JAP, B8L, etc.) |
| Application | Blade Lift/Tilt Cylinders, Ripper Cylinder Seals |
| Pressure Range | 0–28 MPa (4,060 PSI) – Matches Cat hydraulic system design |
| Temperature Tolerance | -40°C to +120°C (-40°F to +248°F) |
| Primary Seal Material | Polyurethane (PU) – High abrasion resistance for sandy environments |
| Secondary Seals | Fluorocarbon (FKM) Rod Seals, Nitrile (NBR) Wiper Seals, PTFE Wear Rings |
| Certifications | ISO 6194 (Rotary Shaft Seals), Caterpillar 1U-9901 Compliance |
Kit Components & Functions
| Main Component | Function |
|---|---|
| 1. Piston Seal (PU) | Dual-acting U-cup retains hydraulic pressure under dynamic blade loads. |
| 2. Rod Seal (FKM) | Step-lip design prevents oil leakage along the cylinder rod. |
| 3. Dust Wiper (NBR) | Removes abrasive debris during rod retraction (ISO 10100 compliant). |
| 4. Wear Ring (PTFE) | Glass-filled PTFE reduces friction between piston and cylinder barrel. |
| 5. Buffer Seal (FKM) | Secondary seal protects against pressure spikes in high-cycle applications. |
| 6. O-Rings (HNBR) | High-pressure static seals for hydraulic port connections (SAE J1926). |
| 7. Backup Ring (PU) | Reinforces rod seal against extrusion under side loads. |
Key Features & Benefits
✅ OEM Interchangeability: Direct replacement for Cat part numbers 122-7644 and 223-9250.
✅ Extreme Environment Durability: PU/FKM seals withstand desert sand, mud, and mining debris.
✅ Extended Service Life: PTFE wear rings reduce cylinder wear by 30% compared to standard designs.
✅ Oil Compatibility: Compatible with Cat DEO 10W-30 and TO-4 hydraulic fluids.
✅ Global Compliance: Meets EU Machinery Directive 2006/42/EC and RoHS standards.
