Introduction
This manual provides detailed instructions for the installation, maintenance, and general information regarding the MOOG K9617 Front Lower Suspension Ball Joint. This component is designed to deliver reliable performance and is suitable for specific Mitsubishi Eclipse models. Adherence to these instructions will ensure proper function and longevity of the part.
The MOOG K9617 ball joint features superior materials and rigorous testing to ensure dependable operation. Its design incorporates problem-solving innovations for efficient installation and extended service life.
Safety Information
Always prioritize safety when working on vehicle suspension components. Improper installation or maintenance can lead to serious injury or vehicle damage. It is recommended that installation be performed by a qualified automotive technician.
- Wear appropriate personal protective equipment, including safety glasses and gloves.
- Ensure the vehicle is securely supported on jack stands before beginning any work.
- Refer to the vehicle manufacturer's service manual for specific torque specifications and procedures.
- Do not use damaged or worn tools.
- Keep hands and clothing clear of moving parts.
Product Overview
The MOOG K9617 is a front lower suspension ball joint. Key features include:
- Problem Solver Gusher Bearing: A metal-to-metal design that provides strength and allows grease to flow through the bearing surface, reducing friction and extending life.
- Strong and Durable Ball Studs: Heat processed to meet or exceed original equipment (OE) requirements, inhibiting premature failure and improving fatigue strength.
- Greaseable Socket: Allows for lubrication, which inhibits corrosion and wear by flushing out debris.
- Patented Pressed-in Cover Plate: Seals out debris and minimizes looseness, reducing bearing wear and promoting longer life, restoring like-new steering.

Image 1: Components of the MOOG K9617 Front Lower Suspension Ball Joint, including the ball joint, dust boot, snap ring, castle nut, and grease fitting.

Image 2: Diagram illustrating the heat-treated stud design for enhanced strength and durability.
Setup and Installation
The MOOG K9617 ball joint is designed for easy installation with precision tolerances, ensuring a proper fit and steering alignment. While specific steps may vary by vehicle model, the general procedure involves:
- Preparation: Safely lift and support the vehicle. Remove the wheel and any components obstructing access to the lower ball joint.
- Removal of Old Ball Joint: Disconnect the steering knuckle from the old ball joint. Remove the fasteners securing the old ball joint to the lower control arm. Use appropriate tools to press out or separate the old ball joint.
- Installation of New Ball Joint: Clean the mounting surfaces. Insert the new MOOG K9617 ball joint into the lower control arm. Ensure proper seating.
- Secure Fasteners: Reconnect the steering knuckle to the new ball joint. Install all nuts and bolts, tightening them to the vehicle manufacturer's specified torque values.
- Lubrication: Before completing the installation, lubricate the new ball joint using a grease gun through the provided zerk fitting.
- Final Steps: Reinstall any removed components and the wheel. Lower the vehicle. It is highly recommended to perform a wheel alignment after replacing suspension components.

Image 3: A technician demonstrating the ease of installation for a ball joint, highlighting precision fit.
Operating Principles
The front lower suspension ball joint is a critical component of your vehicle's steering and suspension system. It acts as a pivot between the steering knuckle and the lower control arm, allowing for vertical movement of the suspension while enabling the wheel to turn left and right. A properly functioning ball joint ensures smooth steering, stable handling, and proper tire contact with the road surface.
The MOOG K9617's design, including its gusher bearing and sealed cover plate, contributes to its reliable operation by maintaining proper lubrication and preventing contamination, which are essential for smooth articulation and reduced wear over time.
Maintenance
Regular maintenance is crucial for extending the life of your MOOG K9617 ball joint, especially due to its greaseable design. Unlike sealed units, this ball joint allows for periodic lubrication.
- Lubrication Schedule: It is recommended to lubricate the ball joint with a high-quality chassis grease at every oil change or according to your vehicle manufacturer's maintenance schedule.
- Procedure:
- Locate the zerk fitting on the ball joint.
- Attach a grease gun to the fitting.
- Pump grease until a small amount of fresh grease begins to seep from the boot, indicating the joint is adequately filled. Do not over-grease, as this can damage the boot.
- Wipe off any excess grease.
- Inspection: Periodically inspect the ball joint boot for tears or damage. A damaged boot can allow contaminants to enter the joint, leading to premature wear.

Image 4: Diagram illustrating the greaseable design of the ball joint, allowing for easy maintenance and extended wear.

Image 5: Diagram showing the slotted gusher bearing, designed to deliver lubrication effectively and reduce wear.
Troubleshooting Common Issues
If you experience any of the following symptoms, it may indicate an issue with your ball joint or other suspension components. Professional diagnosis is recommended.
| Symptom | Possible Cause | Action |
|---|---|---|
| Clunking or popping noise from the front suspension | Worn or loose ball joint, worn bushings | Inspect ball joint for excessive play; replace if necessary. Check other suspension components. |
| Excessive play in the steering wheel | Worn ball joint, tie rod ends, or steering rack | Have steering and suspension components inspected by a professional. |
| Uneven tire wear | Misalignment, worn ball joints, or other suspension issues | Check for worn components and perform a wheel alignment. |
| Vehicle pulls to one side | Misalignment, worn ball joints, or brake issues | Inspect suspension and braking systems; perform alignment. |
Specifications
| Attribute | Detail |
|---|---|
| Brand | MOOG |
| Model Number | K9617 |
| Item Weight | 9.6 ounces |
| Product Dimensions | 5.25 x 3.31 x 2.75 inches |
| Position | Front Lower |
| Manufacturer Part Number | K9617 |
| OEM Part Number | K9617 |
Warranty Information
MOOG products are manufactured to high standards and are typically backed by a manufacturer's warranty. For specific warranty terms and conditions applicable to the K9617 Front Lower Suspension Ball Joint, please refer to the official MOOG website or contact MOOG customer support directly. Keep your proof of purchase for warranty claims.
Support and Contact
For further assistance, technical support, or inquiries regarding the MOOG K9617 Front Lower Suspension Ball Joint, please visit the official MOOG website or contact their customer service department.
- MOOG Official Website: Visit the MOOG Store on Amazon (for product information and resources)
- Refer to the packaging for direct contact information or a dedicated support portal.







