Threaded Aluminum Oil Cap Kit for ALKO and Hayes 7K - 8K Axles, 2-7/8"
Heavy-duty aluminum alloy protection with visual monitoring and magnetic debris filtration for professional-grade hub performance.
Overview
Upgrade your trailer's wheel end protection with this Heavy Duty Aluminum Alloy Lube Cap. Engineered for versatility, this cap is designed to perform in both grease and oil bath applications. Featuring a clear indicating window for instant lubricant level checks and a magnetic vent plug to trap debris, it is the ultimate professional-grade solution for preventing hub failure and extending bearing life.
R&P Service Insight
This component is the ideal upgrade from standard plastic caps, offering significantly higher resistance to environmental stress and load impact.
- Wear Resistance: Aluminum construction prevents the cracking and warping common in polycarbonate caps.
- Chemical Guard: UV-resistant sight glass and alloy body withstand road chemicals and sun exposure.
- Easy Access: Integrated fill and drain ports simplify lubricant changes without hub disassembly.
R&P Knowledge Hub
Compatibility: Standard 1/8"-27 NPTF plug threading; fits most heavy-duty trailer hubs designed for screw-in oil or grease caps.
Vehicle / System Fit: Ideal for Utility, Flatbed, and Equipment trailers using grease or oil bath hub systems.
Installation Notes: To safeguard the Valcrum Warranty, ensure that the Valcrum Oil Cap Wrench is used for installation and removal. Do not over-torque.
Performance Insight: The aluminum alloy body dissipates heat more effectively than plastic, while the integrated magnet pulls metallic wear particles out of suspension to clean the lubricant actively.
R&P Repair Insight
Before proceeding with your order or installation, please perform these essential checks to ensure a perfect fit and long-term reliability.
- Thread Check: Verify your hub thread diameter is 2-7/8" to match these specific ALKO/Hayes style hubs.
- Tooling: Avoid using standard pipe wrenches, as they can damage the machined finish and void the manufacturer warranty.
- O-Ring Seat: Ensure the hub face is clean and free of debris to allow the new O-ring to create a pressure-tight seal.
Features
Dual-Purpose Design
Fully compatible with both Grease and Oil Bath lubrication systems for maximum versatility.
Visual Monitoring
Integrated indicating window allows for rapid "at-a-glance" lubricant level and clarity checks.
Magnetic Protection
The included magnetic vent plug removes harmful metallic micro-particles from your hub's lubricant.
Heavy Duty Build
Machined aluminum alloy body provides superior impact resistance and durability over OEM plastic units.
Specifications
| Specification | Detail |
|---|---|
| Part Number | D021-212-10 |
| Product Type | Heavy Duty Hub Lube Cap |
| Application | Grease or Oil Bath Hubs |
| Material / Finish | Aluminum Alloy / Machined |
| Key Measurement | 2-7/8" Diameter |
| Port Thread | 1/8"-27 NPTF |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Utility, Equipment, and Heavy Duty Trailers |
| Primary Fit | ALKO and Hayes Axles |
| Axle Capacity | Standard 7k, 8k, and Heavy Duty Axles |
| Notes | Requires Valcrum Wrench for warranty compliance. One kit per wheel. |
Included Components
| Quantity | Item |
|---|---|
| 1 | Aluminum Alloy Lube Cap Body |
| 1 | Magnetic Vent Plug |
| 1 | Sealing O-Ring/Gasket Set |
| 1 | 1/8"-27 NPTF Plug & Hardware |
