1. Introduction
This manual provides instructions for the installation, operation, and maintenance of your INJORA +4mm Extended CNC Aluminum Rear Axle for TRX4M 1/18 RC Crawler Car. This upgrade component is designed to enhance the stability and climbing performance of your RC vehicle.
Figure 1.1: INJORA +4mm Extended CNC Aluminum Rear Axle.
2. Safety Information
Please read and understand all safety precautions before installing or operating this product. Failure to do so may result in damage to the product or personal injury.
- Always disconnect the battery from your RC vehicle before performing any maintenance or installation.
- Use appropriate tools for installation to prevent damage to components.
- Keep small parts away from children.
- Ensure all screws and fasteners are securely tightened after installation.
3. Package Contents
The INJORA +4mm Extended CNC Aluminum Rear Axle package includes the following components:
- Pre-assembled CNC Aluminum Rear Axle housing.
- Hardened CVD shafts.
- Steel 12/24T gears.
- 5mm (+1mm) brass wheel hexes.
- Nuts and all necessary hardware for assembly.
Figure 3.1: Included components with the INJORA Rear Axle.
4. Specifications
| Brand | INJORA |
| Model Number | 4M-61 |
| Material Type | Aluminum |
| Extension | +4mm per side (8mm total width increase) |
| Compatibility | TRX4M Bronco, Defender, K10, High Trail 1/18 RC Crawler |
| Assembly Required | No (Pre-assembled) |
5. Installation
The INJORA +4mm Extended CNC Aluminum Rear Axle comes pre-assembled for simplified installation. Follow these steps to replace your vehicle's stock rear axle:
- Prepare the Vehicle: Disconnect the battery from your TRX4M RC crawler. Place the vehicle on a stable surface.
- Remove Stock Rear Axle: Carefully detach the wheels, suspension links, and driveshaft connected to the stock rear axle. Remove any screws securing the stock axle to the chassis.
- Install INJORA Rear Axle: Position the new INJORA +4mm Extended CNC Aluminum Rear Axle. Attach the suspension links and driveshaft to the new axle. Secure the axle to the chassis using the appropriate screws.
- Attach Wheels: Reattach the wheels to the new brass wheel hexes. Ensure all connections are secure.
- Compatibility Note: Due to the extended nature of these axle housings, they are not compatible with original TRX4M size steering links and dogbone shafts. Ensure you are using compatible components for the front axle if upgrading both.
Figure 5.1: Installed INJORA Rear Axle on a TRX4M RC Crawler.
6. Operation
The INJORA +4mm Extended CNC Aluminum Rear Axle provides several operational benefits:
- Increased Stability: The +4mm extension on each side results in an 8mm wider stance, significantly improving the vehicle's stability during climbs and traverses.
- Enhanced Climbing Performance: The added width and weight of the aluminum axle contribute to a lower center of gravity and improved traction, aiding in more effective climbing.
- Durability: Constructed from CNC machined aluminum with hardened CVD shafts and steel gears, this axle offers superior durability compared to stock plastic components, especially under demanding off-road conditions.
Figure 6.1: TRX4M RC Crawler showcasing the wider stance with INJORA extended axles.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your INJORA rear axle:
- Inspection: Periodically inspect the axle for any signs of wear, damage, or loose components. Check the gears, shafts, and bearings.
- Cleaning: After use, especially in dirty or wet conditions, clean the axle to remove dirt, mud, and debris. Use a soft brush and compressed air. Avoid harsh chemicals.
- Lubrication: Ensure the internal gears are properly lubricated. Refer to your RC vehicle's general maintenance guide for recommended lubricants and frequency.
- Fastener Check: Regularly check and tighten all screws and nuts to prevent loosening during operation.
Figure 7.1: Detailed view of the axle shaft and bearing for maintenance.
8. Troubleshooting
If you encounter issues with your INJORA +4mm Extended CNC Aluminum Rear Axle, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Excessive noise from axle | Lack of lubrication, worn gears, loose components | Check lubrication, inspect gears for wear, tighten all screws. |
| Reduced power or binding | Debris in gears, bent shaft, damaged bearing | Clean axle, inspect shafts and bearings for damage, replace if necessary. |
| Axle feels loose | Loose mounting screws, worn suspension links | Tighten all mounting screws, inspect and replace worn suspension links. |
9. Warranty & Support
INJORA products are manufactured to high standards. For specific warranty information, please refer to the product packaging or the official INJORA website. If you require technical assistance or have questions regarding your product, please contact INJORA customer support through their official channels.
Visit the INJORA Store for more information: INJORA Official Store