Traxxas Ford Fiesta ST Rally Motor Replacement

Introduction

In the situation where the motor in a Traxxas Ford Fiesta ST Rally fails due to natural wear, lack of maintenance, or is somehow defective, the user may need to remove the motor and replace it with a functioning motor. The process will not take long and will only require the use of standard hex keys. This guide will provide a walkthrough of the process of removing the broken motor and installing a new one that can be ordered online or bought at a hobby store. Before using this guide, please disconnect the battery in the chassis and ensure that any dust or dirt will not pose a hazard to components before completing the fix. Any hazardous dirt can often be removed with canned air, a duster, or lightly shaking the dirt off holding the chassis upside down.

What you need

Step 1 Motor

Traxxas Ford Fiesta ST Rally Motor Replacement, Motor: step 1, image 1 of 3

Traxxas Ford Fiesta ST Rally Motor Replacement, Motor: step 1, image 2 of 3

Traxxas Ford Fiesta ST Rally Motor Replacement, Motor: step 1, image 3 of 3

Remove each of the four pins that hold the scale model shell by pulling them from their posts.
Remove the shell by lifting it off the chassis using your hands.

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Step 2

Remove the 3x6 mm screw holding the wire retainer in place using a 2.5 mm hex key.
Remove the wire retainer by lifting it off the chassis.

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Step 3

This guide was done without a battery present. Please remember to properly disconnect any batteries before this step as it could cause injury to you or damage to the device.
Disconnect both power cables attaching the electronic speed control to the motor.

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Step 4

Remove the 3x15 mm retaining bolt using the 3 mm hex key.
Remove the 3x6 mm flat head screw holding the motor plate in place with the 3 mm hex key.

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Step 5

Use the 2.5 mm hex key to remove the 3x6 mm screw for the gear cover.
To remove the cover, simply lift it up and off of the chassis.
During reassembly, ensure that the motor and gearing line up just how it is in the second photo for this step.

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Step 6

Traxxas Ford Fiesta ST Rally Motor Replacement: step 6, image 3 of 3

Remove the motor by rotating and lifting it free from the chassis.
You may need to clean the area where the new motor will be to prevent the possibility of debris becoming a problem for a newly replaced engine.

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Step 7

Traxxas Ford Fiesta ST Rally Motor Replacement: step 7, image 3 of 3

Use the 2.5 mm hex key to loosen the 3x8 mm screws to remove the motor plate.
Use the 2 mm hex key to loosen the 3 mm grub screw enough to remove the pinion gear from the motor.
Slide the pinion gear right off the motor's external rod when loose enough.
Make sure to have the pinion gear in the exact same area as it was on the replaced motor in order to align with the device's gearing.
This process can also be used to put an even better motor in as a replacement during reassembly.