1. Introduction and Overview
This manual provides detailed instructions for the installation, operation, and maintenance of your INJORA Extended 4mm CNC Aluminum Front Axle. This high-quality upgrade component is specifically designed for 1/18 scale TRX4M Defender, Bronco, and K10 High Trail RC crawlers, enhancing their stability and climbing performance.
The axle features precision CNC machining and a durable black anodized finish, ensuring both performance and longevity for your RC vehicle.
2. Product Features
- High-Quality Construction: CNC machined aluminum with a black anodized finish for excellent durability and precision.
- Extended Design: +4mm extension on each side, resulting in an 8mm increase in total width for improved stability and enhanced climbing capabilities.
- Integrated Components: Includes hardened CVD shafts, 12/24T steel gears, and 5mm (+1mm) brass hexes with wheel nuts.
- Pre-assembled: Designed for simpler installation, arriving pre-assembled with all necessary hardware.
- Compatibility: Specifically engineered for TRX4M Defender, Bronco, and K10 High Trail 1/18 RC Crawlers.
3. Package Contents
Please verify that all items are present and in good condition upon opening the package:
- One (1) INJORA Extended 4mm CNC Aluminum Front Axle (Pre-assembled)
- Hardened CVD shafts (pre-installed)
- 12/24T steel gears (pre-installed)
- 5mm (+1mm) brass hexes
- Wheel nuts
- Assorted mounting hardware (screws, washers, etc.)
4. Setup and Installation
4.1 Safety Precautions
- Always disconnect the battery from your RC vehicle before performing any maintenance or installation.
- Use appropriate tools to avoid damaging components.
- Keep small parts away from children.
4.2 Tools Required (Not Included)
- Small Phillips head screwdriver
- Hex wrenches (various sizes, typically 1.5mm, 2.0mm)
- Pliers (optional)
4.3 Installation Steps
- Prepare Vehicle: Place your TRX4M RC crawler on a stable surface. Disconnect the battery.
- Remove Original Axle: Carefully unbolt and remove the existing front axle assembly from your TRX4M chassis. Disconnect the steering links, drive shaft, and any other attached components.
- Unpack New Axle: Remove the INJORA Extended 4mm CNC Aluminum Front Axle from its packaging.
- Mount New Axle: Position the new axle onto the TRX4M chassis. Secure it using the provided mounting hardware. Ensure all screws are tightened appropriately, but do not overtighten.
- Connect Components: Reconnect the drive shaft to the new axle. Attach your compatible steering links to the axle's steering knuckles.
- Important Compatibility Note: Due to the extended design of this axle, it is not compatible with the original TRX4M steering links and dogbone shafts. Ensure you are using compatible aftermarket steering links and drive shafts.
- Install Wheels: Attach your wheels using the provided brass hexes and wheel nuts.
- Final Check: Verify that all connections are secure and that the steering and suspension move freely without binding.
Image 1: Overview of the INJORA Extended 4mm CNC Aluminum Front Axle.
Image 2: The extended front axle installed on a 1/18 scale TRX4M RC crawler, showcasing its integration.
5. Operating Instructions
Once the INJORA Extended 4mm CNC Aluminum Front Axle is correctly installed, operate your TRX4M RC crawler as you normally would. The extended width provided by this axle will contribute to improved stability, especially during side-hilling and aggressive climbing maneuvers. You may notice enhanced control and a more planted feel during operation.
6. Maintenance
Regular maintenance will ensure the longevity and optimal performance of your INJORA axle:
- Inspection: Periodically inspect the axle for any signs of wear, damage, or loose components. Check the CVD shafts, gears, and bearings.
- Cleaning: Keep the axle assembly clean from dirt, dust, and debris, especially after off-road use. A soft brush and compressed air can be effective.
- Fastener Check: Regularly check all screws and fasteners for tightness. Vibrations during operation can cause them to loosen over time.
- Lubrication: Apply a small amount of appropriate RC-specific grease to the gears and moving parts as needed to reduce friction and wear.
Image 3: Close-up of the axle showing the bearing and hex, critical areas for inspection and lubrication.
Image 4: Detailed view of the CVD joint, which should be regularly checked for smooth operation and wear.
7. Troubleshooting
| Issue | Possible Cause | Solution |
|---|---|---|
| Axle not fitting correctly or binding | Incompatible steering links or drive shafts; incorrect installation. | Ensure you are using aftermarket steering links and drive shafts compatible with extended axles. Recheck all mounting points and ensure no components are obstructing movement. |
| Excessive play or noise from axle | Loose fasteners; worn gears or bearings; lack of lubrication. | Tighten all screws and fasteners. Inspect gears and bearings for wear and replace if necessary. Apply appropriate RC lubricant to gears and moving parts. |
| Reduced performance or sluggish movement | Debris in axle housing; worn components. | Clean the axle assembly thoroughly. Inspect for worn parts and replace as needed. |
8. Specifications
- Model Number: 4M-61FR-1
- Material: CNC Machined Aluminum
- Color: Black Anodized
- Axle Extension: +4mm per side (8mm total width increase)
- Included Components: Hardened CVD shafts, 12/24T steel gears (12/24T), 5mm (+1mm) brass hexes, wheel nuts
- Compatibility: TRX4M Defender, Bronco, K10 High Trail 1/18 RC Crawler
- Product Dimensions (L x W x H): 13 x 8 x 4 cm
- Product Weight: 45 grams
Image 5: Top view of the extended front axle, highlighting its overall structure and design.
Image 6: Front view of the extended front axle, showing the differential housing and mounting points.
9. Warranty and Support
For information regarding product warranty, returns, or technical assistance, please refer to the INJORA official website or contact the retailer from whom you purchased this product. Please have your product model number (4M-61FR-1) and proof of purchase ready when contacting support.