DEXTER AXLE 008-430-15
Dexter 9-10KGD Hub & Drum Assembly User Manual
Model: 008-430-15
Introduction
This manual provides essential information for the installation, operation, and maintenance of the Dexter 9-10KGD Hub & Drum Assembly. This product is designed for 9-10K General Duty axles and features a bolt-on Fortress oil cap. It is a newer style hub and drum, identifiable by the "9-123" stamp on the drum face.
Please read this manual thoroughly before attempting any installation or maintenance procedures to ensure safe and correct usage.
Product Overview
The Dexter 9-10KGD Hub & Drum Assembly is a critical component for trailer braking systems. Key features include:
- Designed for Dexter 9-10K General Duty axles.
- Compatible with the new bolt-on Fortress oil cap.
- Drum size: 12-1/4 inches x 3-3/8 inches.
- Bolt circle: 8 on 6.50 inches.
- Equipped with 5/8 inch studs.
- Identified by "9-123" stamped on the drum face (for post-2009 models).
- Includes Fortress K21-259-00 Oil Cap.
Setup and Installation
Proper installation is crucial for the safe and effective operation of your Dexter hub and drum assembly. It is recommended that installation be performed by a qualified technician.
Required Tools and Materials:
- Torque wrench
- Grease gun and appropriate grease (if applicable for your bearing type)
- Bearing packer (if applicable)
- Socket set
- Safety glasses and gloves
- Shop rags
Installation Steps:
- Preparation: Ensure the axle spindle is clean and free of debris. Inspect the spindle for any damage.
- Bearing Installation: Install the inner and outer bearings into the hub, ensuring they are properly seated. If using greaseable bearings, pack them thoroughly with high-temperature wheel bearing grease.
- Seal Installation: Carefully install the grease seal into the back of the hub. Ensure it is flush and not damaged.
- Mounting the Hub: Slide the assembled hub and drum onto the axle spindle. Be careful not to damage the grease seal.
- Nut Torque: Install the spindle nut and washer. Torque the spindle nut to the manufacturer's specifications (refer to your axle manual for precise torque values). This typically involves tightening, rotating the hub, and then backing off slightly to allow for proper bearing play.
- Fortress Cap Installation: Install the Fortress K21-259-00 Oil Cap onto the hub using the provided bolts. Ensure the cap is securely fastened and the gasket (if present) is properly seated to prevent leaks.
- Wheel Installation: Mount the wheel and tire assembly onto the hub studs. Torque the lug nuts to the vehicle or trailer manufacturer's specifications.
- Final Check: Rotate the wheel to ensure smooth operation and no excessive play. Check for any signs of leaks around the oil cap.
Operating Considerations
Once installed, the Dexter 9-10KGD Hub & Drum Assembly operates as part of your trailer's braking system. No specific user operation is required beyond standard trailer use. However, regular checks are recommended.
Pre-Trip Inspection:
- Visually inspect the hub and drum for any signs of damage, cracks, or excessive wear.
- Check for any oil or grease leaks around the Fortress cap or wheel seal.
- Ensure all lug nuts are properly tightened.
- Verify proper brake function before each trip.
Maintenance
Regular maintenance extends the life of your hub and drum assembly and ensures safe operation.
Bearing Maintenance:
- Lubrication: If your assembly uses greaseable bearings, re-lubricate them according to your axle manufacturer's recommendations, typically every 12,000 miles or annually, whichever comes first. Use only high-temperature wheel bearing grease.
- Inspection: During lubrication, inspect bearings for pitting, discoloration, or excessive wear. Replace bearings and races as a set if any damage is observed.
Brake Component Inspection:
- Periodically remove the drum to inspect brake shoes, magnets (for electric brakes), and springs for wear or damage. Replace components as needed.
- Check the drum's inner surface for scoring or excessive wear. Drums can be machined if wear is within limits, or replaced if beyond repair.
Fortress Cap:
- Ensure the Fortress oil cap remains securely bolted. Check for any signs of oil leakage.
- If equipped with a sight glass, periodically check the oil level. Refer to your axle manual for proper oil levels and types.
Troubleshooting
This section addresses common issues that may arise with your hub and drum assembly.
| Symptom | Possible Cause | Solution |
|---|---|---|
| Excessive wheel play or wobble | Loose spindle nut, worn bearings, damaged spindle | Adjust spindle nut to proper torque, inspect and replace bearings, inspect spindle for damage. |
| Oil/Grease leakage from hub | Damaged or improperly installed seal, loose Fortress cap, overfilling with lubricant | Inspect and replace seal, tighten Fortress cap bolts, ensure proper lubricant level. |
| Grinding or unusual noise from wheel | Worn or damaged bearings, brake components rubbing | Inspect and replace bearings, inspect brake shoes and drum for contact. |
| Brake performance issues (e.g., weak braking, pulling) | Worn brake shoes, contaminated brake surface, faulty brake magnet (electric brakes) | Inspect and replace brake components, clean brake surface, test brake magnet. |
If you encounter issues not listed here or if solutions do not resolve the problem, consult a qualified trailer service technician.
Specifications
| Attribute | Detail |
|---|---|
| Brand | Dexter Axle |
| Model Number | 008-430-15 |
| Application | 9-10K General Duty Axles |
| Drum Size | 12-1/4" x 3-3/8" |
| Bolt Circle | 8 on 6.50" |
| Stud Size | 5/8" |
| Cap Type | Fortress Bolt-on Oil Cap (K21-259-00 included) |
| Item Weight | 72 pounds |
| Product Dimensions | 13 x 13 x 10 inches |
| Identification Mark | "9-123" stamped on drum face (post-2009 style) |
| Contents | Hub & Drum Assembly, Fortress K21-259-00 Oil Cap |
Support and Contact Information
For technical assistance, replacement parts, or further inquiries regarding your Dexter 9-10KGD Hub & Drum Assembly, please contact Dexter Axle customer support or visit their official website.
Manufacturer: Dexter Axle
Note: Specific contact details (phone numbers, email addresses) are not provided in this manual. Please refer to the manufacturer's official website or product packaging for the most current support information.
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