High-quality boom cylinder seal kit for CAT 311D, ensuring reliable sealing, improved hydraulic performance, and long-lasting cylinder operation.
OEM-matched 283-6179 boom cylinder seal kit for CAT 311D
Includes all wear rings, O-rings, dust seals, buffers, and pressure seals
Engineered for high-pressure resistance and long service life
Restores cylinder performance, reducing leakage and power loss
Ideal for excavator boom section maintenance and overhaul
The YNF17725 Boom Cylinder Seal Kit, replacing OEM 283-6179, is a complete hydraulic seal set designed specifically for the CAT 311D excavator boom cylinder. This kit restores proper sealing of the boom cylinder, preventing issues such as hydraulic oil leakage, weak lifting power, drifting, and unstable boom movement. Since the boom cylinder handles high loads and constant movement, worn seals can quickly lead to performance loss or internal damage.
Each seal in this kit is produced using premium materials including high-strength rubber, polyurethane, and PTFE compounds that offer outstanding resistance to pressure, wear, and temperature fluctuations. The precise sizing ensures a perfect fit, allowing smooth cylinder operation and extended service life.
Ideal for repair workshops, fleet owners, and aftermarket distributors, this seal kit offers a reliable and cost-effective solution for maintaining the hydraulic performance of CAT 311D excavator boom cylinders.
| Parameter | Details |
|---|---|
| YNF Part Number | YNF17725 |
| OEM Number | 283-6179 |
| Machine Model | CAT 311D |
| Component | Boom Cylinder Seal Kit |
| Included Components | O-rings, dust seals, rod seals, piston seals, wear rings |
| Material | Rubber / PU / PTFE / High-pressure sealing compounds |
| Function | Restores boom cylinder sealing & lifting power |
| Application | Hydraulic cylinder overhaul |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Set |
| Shipping Options | Air, Sea, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Boom Cylinder Overhaul | Restores hydraulic sealing and lifting performance |
| CAT 311D Excavator Maintenance | OEM-fit replacement for 283-6179 |
| Hydraulic Leakage Repair | Eliminates oil leaks and pressure loss |
| Heavy-Duty Excavation Operations | Ensures stable and efficient boom movement |
| Aftermarket Seal Kit Distribution | Ideal for repair shops & parts wholesalers |
Related Products:
CAT 311D Arm Cylinder Seal Kit
Boom Cylinder Rod & Piston Components
Hydraulic Pump Seal Kits
Excavator Control Valve Seal Sets
FAQs：
Q: Does this kit fit CAT 311D boom cylinder?
A: Yes, it is designed specifically for the 311D model.
Q: What problems does this seal kit solve?
A: Oil leakage, drifting, weak lifting, and pressure loss.
Q: Is it a complete rebuild kit?
A: Yes, it includes all required seals.
Q: MOQ?
A: 1 set only.
The YNF17725 283-6179 Boom Cylinder Seal Kit provides a complete sealing solution for CAT 311D boom cylinders. Manufactured with high-pressure, wear-resistant materials, it restores hydraulic stability and machine lifting performance. YNF Machinery delivers dependable quality, competitive pricing, and fast international shipping—ideal for equipment fleets, repair shops, and aftermarket distributors. Contact us now for an accurate quotation.
