GORILLA 78691N

Gorilla Automotive 78691N Acorn Open End Wheel Locks User Manual

Model: 78691N

Introduction

The Gorilla Automotive 78691N Acorn Open End Wheel Locks are designed to provide enhanced security for your vehicle's wheels. This set includes four wheel locks and a unique key, engineered for durability and resistance to tampering. The locks feature a 9/16" thread size and a 13/16" hex size, with a 60-degree conical seat for proper fitment.

Manufactured from case hardened steel and chrome plated, these wheel locks offer both robust protection and a lasting aesthetic finish. The external security pattern ensures that the locks cannot be removed without the corresponding key, adding a critical layer of theft deterrence.

Package Contents

Gorilla Automotive Wheel Locks retail packaging

The Gorilla Automotive 78691N Acorn Open End Wheel Locks come in a clear retail package. The package typically contains four wheel locks and one unique key. The packaging highlights key features such as tough hardened-steel construction and an easy-guide key.

  • 4 x Gorilla Acorn Open End Wheel Locks
  • 1 x Unique Wheel Lock Key
  • 1 x Key Registration Label (for replacement key information)

Setup and Installation

Proper installation of your Gorilla wheel locks is crucial for security and performance. Always ensure your vehicle is safely supported before working on wheels.

  1. Preparation: Park your vehicle on a level surface and engage the parking brake. If you are lifting the vehicle, use a jack and jack stands for safety.
  2. Remove Standard Lug Nuts: Using a lug wrench, loosen and remove one standard lug nut from each wheel. It is recommended to replace one lug nut per wheel with a wheel lock.
  3. Install Wheel Locks:
    Four Gorilla Automotive Wheel Locks

    Carefully thread a Gorilla wheel lock onto the wheel stud by hand. Ensure it threads smoothly without resistance. Do not force it. The locks are designed with a 60-degree conical seat to match most factory and aftermarket wheels.

    Close-up of a single Gorilla wheel lock with dimensions

    This image shows a detailed view of a single Gorilla wheel lock, highlighting its conical seat and overall dimensions. The 9/16" thread size and 13/16" hex size are critical for compatibility and proper installation.

  4. Tighten Wheel Locks: Place the unique wheel lock key onto the wheel lock. Using a lug wrench, tighten the wheel lock to the manufacturer's specified torque settings for your vehicle. Do not overtighten.
  5. Repeat for all Wheels: Install one wheel lock on each wheel.
  6. Store Key Safely: Keep the wheel lock key in a secure, memorable location within your vehicle, such as the glove compartment or center console. Avoid storing it in the trunk with the spare tire tools, as it may be needed more frequently.

Operating Instructions (Removing/Installing Wheels)

When you need to remove or install your wheels (e.g., for tire rotation, flat tire, or maintenance), follow these steps:

  1. Access Key: Retrieve your unique Gorilla wheel lock key.
  2. Loosen Wheel Lock: Place the wheel lock key onto the wheel lock. Using a lug wrench, turn counter-clockwise to loosen the wheel lock. Once loose, remove it by hand.
  3. Remove Other Lug Nuts: Proceed to loosen and remove the remaining standard lug nuts.
  4. Wheel Removal: Carefully remove the wheel from the vehicle.
  5. Wheel Installation: When reinstalling the wheel, place it onto the wheel studs. Hand-tighten the standard lug nuts first, then hand-tighten the wheel lock using its key.
  6. Final Tightening: Lower the vehicle partially so the tire just touches the ground, then torque all lug nuts and the wheel lock to the vehicle manufacturer's specifications. Finally, lower the vehicle completely.
Gorilla wheel lock key and registration card

This image displays the unique wheel lock key alongside the key registration card. It is essential to keep this card in a safe place, separate from the key, as it contains information needed to order a replacement key if yours is lost.

Maintenance

Gorilla wheel locks are designed for durability and require minimal maintenance. However, following these tips can prolong their life and ensure proper function:

  • Regular Inspection: Periodically inspect the wheel locks for any signs of damage, corrosion, or wear.
  • Cleaning: Clean the wheel locks with mild soap and water when washing your vehicle. Avoid harsh chemicals or abrasive cleaners that could damage the chrome finish.
  • Lubrication (Optional): A small amount of anti-seize lubricant on the threads can prevent galling and make future removal easier, especially in corrosive environments. Apply sparingly.
  • Key Care: Keep the wheel lock key clean and free of debris. Ensure the key's pattern remains clear for proper engagement with the lock.

Troubleshooting

ProblemPossible CauseSolution
Difficulty removing wheel lockOvertightened, cross-threaded, or corroded.Ensure the key is fully seated. Apply steady, firm pressure. If severely stuck, consult a professional mechanic. Avoid using impact wrenches for removal or installation.
Lost wheel lock keyKey misplaced or stolen.Refer to the key registration label included with your product. Contact Gorilla Automotive with the registration number to order a replacement key. If no registration number is available, a professional may be able to remove the locks.
Wheel lock appears damagedImpact damage, improper installation, or excessive force.Do not attempt to use a damaged wheel lock. Replace it immediately. Contact Gorilla Automotive for replacement parts.

Specifications

FeatureDetail
BrandGORILLA
Model NameGorilla Lock Acorn Oe 9/16 Zinc Clam
Model Number78691N
Thread Size9/16"
Hex Size13/16"
Seat Type60 Degree Conical Seat
MaterialAlloy Steel, Chrome
Finish TypeChrome Plated
Number of Pieces4 (locks) + 1 (key)
Item Weight9.2 ounces
UPC012619786916

Warranty and Support

Gorilla Automotive products are manufactured to high standards. For specific warranty information, please refer to the documentation included with your purchase or contact Gorilla Automotive directly.

For technical support, replacement parts, or inquiries regarding your wheel locks, please contact Gorilla Automotive customer service. When contacting support, please have your model number (78691N) and, if applicable, your wheel lock key registration number ready.

Contact Information:

  • Manufacturer: Gorilla Automotive
  • Address for Key Replacement: P.O. Box 58747, Los Angeles, CA 90058-0747 (as per key registration label)
  • Official Website: www.gorilla-auto.com (Please note: This is a general link to the manufacturer's website and may not be directly affiliated with the product listing.)

A user manual in PDF format is also available for download: Download User Manual (PDF)

© 2025 Gorilla Automotive. All rights reserved.

This manual is for informational purposes only. Always follow vehicle manufacturer's guidelines for wheel installation and torque specifications.

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