391-4638 Seal Kit for Caterpillar 308E Mini Excavator
Aftermarket 391-4638 cylinder seal kit. Compatible with the Caterpillar 308E mini hydraulic excavator. Engineered for reliable leak prevention and standard hydraulic cylinder maintenance. Built for durability and precise fitment.
Brand: WINSCHEN
Country of Origin: CHINA
Minimum order quantity: 1 SET
Delivery time: 1-3 Days
SKU: CTC-391-4638
391-4638 Hydraulic Seal Kit for Caterpillar Equipment
Address hydraulic fluid leaks and restore proper cylinder pressure with the WINSCHEN 391-4638 Seal Kit. Engineered to meet the precise operational standards of Caterpillar mini hydraulic excavators, this aftermarket seal kit provides the essential elastomeric components required to fully rebuild and service your hydraulic cylinder assemblies.
Key Features
- Direct Replacement: Manufactured to specific OEM dimensional tolerances, ensuring a seamless fit and straightforward installation as a direct replacement for Caterpillar part number 391-4638.
- Industrial Durability: Constructed from fluid-resistant polyurethane and high-grade rubber compounds designed to withstand continuous internal friction, high pressure spikes, and environmental contaminants typical in earthmoving applications.
- Cost-Effective Maintenance: A highly functional aftermarket alternative that meets original equipment specifications, providing a reliable solution for hydraulic cylinder rebuilding and minimizing routine equipment downtime.
Compatible Equipment Models
Based on official catalog cross-reference data, the 391-4638 seal kit is engineered for specific applications on the following Caterpillar machinery:
- Mini Hydraulic Excavators: 308E
Parts List Reference
| Pos. | Part No | Qty | Parts name |
|---|---|---|---|
| 1. | 214-7565 | 1 | SEAL-O-RING |
| 2. | 326-1813 Y | 1 | VALVE GP-PILOT (BOOM LOWERING) |
| 3. | 344-7391 | 1 | SENSOR-PRESSURE (EJECTOR) (BOOM LOWERING CONTROL) |
| 4. | 391-4632 | 1 | TUBE AS |
| 5. | 391-4633 | 1 | BLOCK |
| 6. | 391-4654 | 1 | PLUG AS |
| 9. | 381-4837 | 1 | SUPPORT AS |
| 10. | 3J-1907 | 1 | SEAL-O-RING |
| 11. | 6V-0852 | 1 | CAP-DUST |
| 12. | 8V-3965 | 1 | FITTING (QUICK DISCONNECT) |
| 13. | 8T-0341 M | 4 | BOLT-SOCKET HEAD (M10X1.5X60-MM) |
| 14. | 146-8336 | 2 | CONNECTOR AS |
| (EACH INCLUDES) | |||
| 3J-1907 | 1 | SEAL-O-RING | |
| 6V-8397 | 2 | SEAL-O-RING | |
| 15. | 148-8367 | 2 | ELBOW AS |
| (EACH INCLUDES) | |||
| 6V-6397 | 1 | SEAL-O-RING | |
| 6V-9650 | 1 | ELBOW | |
| 16. | 148-8878 | 1 | ELBOW AS |
| 3J-1907 | 1 | SEAL-O-RING | |
| 6V-6397 | 1 | SEAL-O-RING | |
| 8V-5724 | 1 | ELBOW | |
| 17. | 148-8433 | 1 | TEE AS |
| 6V-8397 | 2 | SEAL-O-RING | |
| 6V-9836 | 1 | TEE-SWIVEL | |
| 18. | 275-1442 | 1 | CLIP (TAB) |
| 19. | 275-1448 | 1 | CLIP (SLOT) |
| 20. | 279-4735 | 2 | STRAP-CABLE (ORANGE) |
| 21. | 279-4737 | 2 | STRAP-CABLE (GREEN) |
| 22. | 318-2246 | 1 | GROMMET |
| 23. | 379-0603 | 1 | HOSE AS |
| 24. | 379-0604 | 1 | HOSE AS |
| 25. | 7K-1181 | 1 | STRAP-CABLE |
| 26. | 8T-4192 M | 1 | BOLT (M12X1.75X25-MM) |
| 27. | 8T-4223 | 2 | WASHER-HARD (13.5X25.5X3-MM THK) |
| 28. | 379-0694 | 1 | COVER |
| 29. | 7X-7729 | 3 | WASHER (11X25X3-MM THK) |
| 30. | 8T-4137 M | 3 | BOLT (M10X1.5X20-MM) |
| 31. | 204-1811 | 2 | STRAP (DUAL) |
| 32. | 245-8842 | 1 | CLIP (LOOP) |
| 33. | 379-0817 | 1 | SWITCH AS-ROCKER (OVERLOAD WARNING DEVICE) |
| 171-7895 | 1 | GASKET | |
| 34. | 381-9217 | 1 | HARNESS AS CONTROL |
| 125-7878 E | TUBE-HEAT SHRINK (17.78-MM DIA) (10-CM) | ||
| HOSE (190-CM) | |||
| 108-2529 E | 6 | SOCKET-CONNECTOR (16-GA TO 18-GA) | |
| 455-0705 | 2 | SEAL-CONNECTOR | |
| 35. | 3S-3083 | 1 | STRAP-CABLE |
| 36. | 7K-1181 | 1 | STRAP-CABLE |
| 322-4582 F | 1 | FILM WARNING (TIPPING HAZARD, READ OMM) | |
| 291-4035 F | 1 | SEAL-O-RING | |
| F | 1 | ELBOW AS | |
| 30-2824 | 1 | SEAL-O-RING | |
| 8V-9007 | 1 | ELBOW | |
| 6V-9746 | 1 | SEAL-O-RING | |
| AVAILABLE REPAIR KIT(S): | |||
| 391-4638 Y | 1 | KIT-SEAL | |
| E | ORDER BY THE CENTIMETER | ||
| F | NOT SHOWN | ||
| I | REFER TO HYDRAULIC INFORMATION SYSTEM |
Specifications
| Part Number | 391-4638 (3914638) |
| Part Type | Seal Kit / Cylinder Repair Kit |
| Application | Hydraulic Cylinder Rebuild |
| Brand | WINSCHEN |
| SKU | CTC-391-4638 |
| MOQ | 1 SET |
| Delivery Time | 1-3 Days |
To ensure proper fitment, please verify your machine’s exact model, equipment serial number, and original hydraulic cylinder configuration with our support team prior to purchasing. We offer fast global shipping to keep your heavy machinery operating efficiently.
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