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  • Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11
  • Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11
  • Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11
  • Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11
  • Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11
  • Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11
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Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11

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$14.90 USD
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Description

Product Subtitle

  • IPX4 Waterproof 8.4V High-Voltage Digital Servo with Metal Gears, High Torque for TRX4, SCX10 and other crawler differential lock/gear shift control

Key Selling Points

  • IPX4 Waterproof Design: IPX4-rated waterproof housing resists splashes and shallow water, ideal for off-road crawling scenarios
  • Metal Gear Construction: High-precision metal gears offer excellent strength and anti-stripping performance for longer service life
  • High-Voltage High-Torque Output: Supports 6.0-8.4V wide voltage input, delivering 4.5kg/cm torque at 8.4V for powerful performance
  • 3-Way Protection: Built-in stall, over-voltage and over-temperature protection prevents motor burnout and extends servo life
  • Wide Compatibility: Fits TRX4, SCX10, Capra, KM5, G550 and most popular crawlers, direct replacement for 2065 servo
  • Fast Response: 0.10sec/60° operation speed with low noise and high precision for smooth gear shift and differential lock control

Product Specifications

  • Parameter Detailed Specification 
  • Brand Hongke HK WUXIAN 
  • Product Model TR-4 Waterproof High-Voltage Servo 
  • Application RC crawler differential lock/gear shift (TRX4, SCX10, KM5, G550, etc.) 
  • Operating Voltage 6.0V - 8.4V 
  • Motor Type Iron Core Motor 
  • Control Method PWM Digital Signal Control (0-180° adjustable) 
  • Pulse Width Range 1000-2000μs (90°) / 500-2500μs (180°) 
  • Operating Speed (6.0V) 0.12 sec/60° 
  • Operating Speed (8.4V) 0.10 sec/60° 
  • Output Torque (6.0V) 3.5 kg/cm 
  • Output Torque (8.4V) 4.5 kg/cm (Rated 4.2kg) 
  • Gear Material Metal 
  • Waterproof Rating IPX4 
  • Dimensions 23.2 × 12.5 × 25.6 mm 
  • Weight 16.6 g 
  • Wire Length 300 mm 
  • Connector Definition Yellow: Signal / Red: Positive / Brown: Negative 

Product Details & Advantages

  • IPX4 Waterproof Housing: Sealed waterproof structure handles splashes and shallow water, improving reliability in off-road crawling scenarios.
  • High-Strength Metal Gears: Wear-resistant metal gear set offers excellent impact and anti-stripping performance, resisting damage under high loads for longer service life.
  • Wide-Voltage High-Voltage Drive: Supports 6.0-8.4V wide voltage input, with significantly increased torque in high-voltage mode to easily drive differential locks and gear shift mechanisms.
  • 3-Way Protection Circuit: Built-in stall, over-voltage and over-temperature protection automatically safeguards the motor under abnormal conditions to prevent burnout.
  • Standard Servo Interface: Universal PWM digital servo interface compatible with most RC crawler ESCs/receivers for easy installation and setup.
  • Compact Lightweight Design: 16.6g lightweight body fits servo mounting positions on TRX4, SCX10 and other models without additional modifications.

Application Scenarios

  • Traxxas TRX-4 crawler differential lock/gear shift servo modification
  • Axial SCX10 series crawler servo upgrade
  • Control for RC models like Raytheon KM5 and Brabus G550
  • High/low speed gear shift control for Land Rover Defender model cars
  • Other RC model scenarios requiring waterproof, high-torque servos

Usage Notes

  • Before installation, verify compatibility of the servo control signal with the receiver/ESC to avoid wiring errors.
  • The waterproof rating is IPX4. Do not submerge in water for extended periods; dry and inspect the servo after use in wet conditions.
  • Do not exceed the rated load during operation to prevent gear damage or motor burnout.
  • Adjust the servo travel according to the vehicle manual to avoid triggering the protection mechanism due to stall.

Package Includes

  • Hongke TR-4 Waterproof Servo × 1
  • (Accessories not specified; servo arms/screws included if applicable)
Countries Available for Delivery
 
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We only accept orders from the countries specified above. For any incorrect orders placed from non-eligible regions, the full payment will be returned to your original payment channel within one business day. 
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30-Day Return/Exchange Policy

We support a 30-day return/exchange policy.

Return & Exchange Procedure


Step 1 Contact customer service to request return/exchange details. Email: myzooi@outlook.com
Step 2 You will receive an email notification once your request is approved.
Step 3 The customer packs the item(s) and ships it back.
Step 4 We will process your refund or replacement after receiving the item(s).


Full-Coverage Return/Exchange Policy

The following scenarios are covered by our 30-day full-coverage return/exchange policy (we will bear the costs of return shipping and replacement):
  • Product information does not match the order
  • We shipped the wrong order or item(s), you received damaged items, or the products have quality issues/defects
  • Blurred image rendering or lettering
  • Incorrect or mismatched size

No Return/Exchange Cases

The following scenarios are not covered by our 30-day return/exchange policy, and we shall not be liable for such issues:
  • Exceeding the return/exchange time limit (30 days after the order is signed for)
  • Non-quality-related issues
  • Product damage caused by misuse, mishandling, or improper maintenance
  • Items that have been washed, soiled, or damaged due to customer mishandling
  • Incorrect size chosen by the customer
  • Personal reasons such as change of taste or change of mind
  • Partial return or exchange of items from a set

Return/Exchange Precautions

  • Items to be returned must be new, unused, and kept in their original condition as received.
  • Coupon codes expire after use and cannot be restored after return.
  • We reserve the right to modify this policy at any time. Any changes will be posted on this page. For questions about order cancellations or other policies, please contact our customer service.

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Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11 Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11 Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11 Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11 Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11 Hongke HK WUXIAN TR-4 Waterproof High-Voltage Metal Gear Servo 4.2kg Torque for RC Crawler Differential Lock & Gear Shift, Compatible with TRX4/SCX10/KM5 DJ11

How to Properly Soak Water Gel Beads

  • Prepare a container and add plenty of clean water to fully submerge the water gel beads.
  • Soak them for 4–6 hours until the beads expand, soften and become fully plump.
  • Keep the beads completely under water during the whole process; otherwise, they will not be fully soaked and may easily cause jamming.
  • If the soaking time is insufficient or there is not enough water, some water gel beads will not absorb enough water, which may cause poor firing or jamming.

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