When Should You Replace Kenworth T660 Hood Struts?

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Kenworth T660 hood struts should be replaced when it no longer provides sufficient lifting support, shows signs of leakage or corrosion, or causes the hood to become difficult or unsafe to operate. Replacing a worn hood strut restores proper hood support, improves maintenance safety, and helps prevent unexpected failures that can lead to costly downtime.

Kenworth T660 Hood Struts Specifications

Kenworth T660 hood struts are defined by several key dimensional and performance parameters that determine proper fitment and lifting function.

Extended Length: 39.375″
Fit: Kenworth T660; Peterbilt 386/387
Application Side: Driver/Left Hand
Type: Non-locking hood struts

Other Truck Hood Strut Size Chart & OEM Cross-Reference

At GASTAC, we recognize that fleet maintenance requires versatility. Beyond our precision-engineered solutions for the Kenworth T660, we supply a comprehensive range of heavy-duty hood gas struts designed to fit a wide variety of commercial truck makes and models. Whether you manage owner-operator rigs or an entire commercial fleet, our struts are built to meet or exceed original equipment manufacturer (OEM) standards for durability, stroke velocity, and lifting force.

Use the cross-reference chart below to find the correct GASTAC replacement strut based on common truck models or your existing OEM part numbers.

Heavy-Duty Truck Hood Strut Cross-Reference Table

Freightliner Cascadia Hood Shock A17-21056-000

Peterbilt 567 579 587 Hood Assist Strut Shock L716006 L716018

Kenworth T880 Hood Strut & Shock L71-6024

Kenworth T680 Peterbilt 579 Hood Strut Hood Shock and hood Assist L71-6021

Kenworth T680 Peterbilt 579 Hood Strut Hood Shock L71-6020 L716008

Freightliner Hood Shock for Cascadia P3 125 A17-19230-000 A17-21056-000

Freightliner Cascadia Hood Shock A17-21073-000

Hood Strut 82750994 for Volvo VNL 2018-Newer

Volvo Hood Strut 20725387 20358822 20502741

Non-Locking Kenworth T680 Hood Shock Strut L71-1010

Freightliner M2 106 Tilt Hood Shock Strut A1716391002

Freightliner M2 106 Tilt Hood Strut Shock A1716391003

A104601 Hood Strut Replacement for Kenworth T660 Truck LH Non-Locking Gas Spring

Freightliner Hood Shock for Cascadia 2018 A1720496001 A1721073001

Cascadia Hood Shock for Freightliner Cascadia P3 A1719230001 A1721056001

Peterbilt 387 Hood Shock 13-05145B

M2 106 Freightliner Hood Shock A17-14297-000

Mack Granite Pinnacle Hood Strut 82713432

How Do You Know It’s Time to Replace Your Hood Strut?

Most hood struts do not fail instantly. Instead, performance gradually declines over time. Recognizing early warning signs can help avoid unexpected failures.

The Hood Feels Heavier Than Before: One of the most common symptoms is increased lifting effort. As internal gas pressure decreases, the strut provides less assistance, making the hood feel noticeably heavier during operation.
The Hood No Longer Stays Fully Open: A healthy hood strut should securely support the hood throughout maintenance procedures. If the hood begins to drift downward or struggles to remain fully open, the strut is likely losing pressure.
Visible Oil Leakage: Gas springs contain internal lubrication systems that help maintain smooth operation. Any visible oil around the piston rod or cylinder body often indicates seal wear and impending failure.
Corrosion on the Rod Surface: Commercial trucks frequently operate in harsh environments, including rain, snow, road salt, and dirt. Corrosion can damage the piston rod surface, accelerate seal wear, and reduce overall service life.
Uneven or Jerky Movement: A hood should open and close smoothly. If movement becomes inconsistent, jerky, or unstable, the gas strut may no longer be functioning properly.

Truck Hood Struts Replacement Recommendations

Replace in pairs: Replace both gas springs together.
Safe Operation: Before removing the old support struts, ensure the hood is secured by someone else or uses temporary supports to prevent the hood from suddenly falling and causing personal injury or vehicle damage.
Check Hinges: While replacing the support struts, check the hood hinges for wear or looseness. Lubricate or tighten them if necessary.
Test: After installation, slowly open the hood and observe whether it can stay stably in any position without abnormal noise.

How to Choose the Right Kenworth T660 Hood Strut?

Before ordering your aftermarket replacement, verify these critical technical specifications to ensure a perfect fit:

Extended Length & Stroke: The new gas spring must match the original dimensions exactly. Incorrect lengths will restrict the hood’s opening angle or prevent it from closing flush with the truck frame.
Force Rating (F1): Proper pressure calibration is non-negotiable. Under-specced struts will fail to hold the heavy T660 fiberglass hood, while over-specced shocks can stress and crack the mounting brackets.
Gas Struts End Fittings: Verify that the ball sockets or eyelet connectors match your truck’s factory hardware for a direct, snap-on installation without modifications.
Environmental Resilience: Because long-haul trucks face severe road salt, grime, and extreme engine bay heat, prioritize struts featuring advanced multi-lip seals and corrosion-resistant rod coatings to maximize service life.

How to Choose High Quality Car Gas Springs

Choosing a high-quality automotive gas spring essentially means verifying whether the product can maintain stable performance after long-term use in various driving conditions and opening and closing movements of the car, rather than just focusing on basic specifications or price.

Cylinder construction utilizes high-strength carbon steel and precision seamless steel tubing.
High-quality piston rods with hard chrome plating provide wear and corrosion resistance.
Cycle life testing at full load conditions reaches 100,000 cycles or more.
Smooth damping performance without stick-slip during extension and compression.
Meets ISO quality management certification standards.
Salt spray testing (ASTM B117) lasts for over 96 to 144 hours.

How to Choose Car Gas Spring Manufacturer

Most hood struts do not fail instantly. Instead, performance gradually declines over time. Recognizing early warning signs can help avoid unexpected failures.

Serving over 100+ automotive industry customers with a strong track record and long-term partnerships with leading brands.
A factory with over 10,000 m² of production facilities and more than 100 employees, including engineering, production, and quality control teams.
Compliance with international quality and safety standards (e.g., ISO certification).
Production capacity of 5,000 automotive gas springs every two weeks.
Strict tolerance control ensuring consistent force output across batches, with an error margin within 0.2%.
Verified cycle life testing and durability performance reports provided.
Reliable after-sales service and technical support for long-term cooperation.

Get Your Truck Hood Struts Quote Today

GASTAC is China’s leading manufacturer of automotive gas springs. Whether you are purchasing standard OEM automotive gas springs or seeking customized solutions for a new automotive modification project, GASTAC can help you select the right specifications.

Please send us your drawings, dimensions, or performance requirements, and our engineering team will provide a recommended solution along with a quotation.