Track Adjuster Grease Cylinder for Caterpillar 320D 239-4390

In demanding excavation environments, stable track tension directly affects machine performance, fuel efficiency, and undercarriage service life. A damaged or leaking grease cylinder can quickly lead to loose tracks, abnormal wear, and unexpected shutdowns on site.

At Quanzhou Qiansheng Heavy Industry Machinery Co., Ltd., we manufacture the Track Adjuster Grease Cylinder for Caterpillar 320D 239-4390  specifically for high-load working conditions. Based on years of experience in excavator undercarriage systems, our production team focuses on durability, sealing stability, and accurate fitment for global aftermarket customers.

Compared with low-cost cylinders commonly found in the market, our products are designed with reinforced structural materials and stricter machining standards to improve long-term operational reliability.

Product Specifications

What are the features of our products?

Precision Honed Inner Cylinder Surface

Seal failure often starts from rough internal cylinder walls. During production, our factory uses precision honing equipment to create a smoother inner bore surface. This helps reduce seal friction and improves grease retention during continuous operation.

For contractors working long shifts in quarry or mining projects, stable sealing performance means fewer maintenance interruptions and more productive machine hours.

High-Pressure Sealing Performance

Excavators operating on rocky ground or uneven terrain generate strong impact pressure inside the recoil system. Inferior seals may crack or leak under repeated shock loads.

Our Track Adjuster Grease Cylinder for Caterpillar 320D 239-4390  uses upgraded polyurethane sealing components designed for:

· High-pressure resistance

· Better wear protection

· Improved dust and mud resistance

· Longer service intervals

Many customers from Southeast Asia and the Middle East choose this configuration for machines operating in high-temperature and dusty environments.

Reinforced Seamless Steel Construction

The cylinder body is manufactured from thick-wall seamless structural steel to improve impact resistance during heavy-duty excavation work.

Compared with welded tube structures used by some lower-grade suppliers, seamless steel construction reduces the risk of:

· Cylinder deformation

· Structural cracking

· Pressure instability

· Premature fatigue damage

This is especially important for machines working in mining operations and continuous earthmoving projects.

Anti-Corrosion Hard Chrome Protection

Mud, water, and abrasive debris can quickly damage untreated piston rods. To improve durability, the rod surface undergoes hard chrome plating treatment to enhance:

· Corrosion resistance

· Surface hardness

· Scratch resistance

· Seal protection

This process helps extend the service life of both the cylinder rod and internal sealing system.

Factory Manufacturing Advantages

Quanzhou Qiansheng Heavy Industry Machinery Co., Ltd. specializes in excavator and bulldozer undercarriage parts manufacturing. Our factory integrates forging, machining, heat treatment, and assembly production processes under strict quality management standards.

Main products include:

· Track rollers

· Carrier rollers

· Front idlers

· Sprockets

· Track chains

· Track adjuster assemblies

With years of export experience, we supply customers in:

· Southeast Asia

· Middle East

· South America

· Europe

· Africa

We also support OEM and customized production according to drawings or samples.

Strict Quality Inspection Before Shipment

Each Track Adjuster Grease Cylinder for Caterpillar 320D 239-4390  undergoes multiple inspection procedures before delivery, including:

· Dimensional inspection

· Seal performance testing

· Pressure testing

· Surface finish inspection

· Fitment verification

We understand that unstable undercarriage parts can directly increase maintenance costs for contractors and equipment owners. That is why every shipment is checked carefully before export packaging.

Export Packaging and Global Delivery

To reduce transportation risks during international shipping, every grease cylinder is protected with anti-rust treatment and reinforced export packaging.

Packaging solutions include:

· Industrial anti-rust oil coating

· Protective wrapping film

· Reinforced fumigation-free wooden pallets

· Secure container loading support

We work with customers ranging from machinery distributors to mining contractors and aftermarket parts wholesalers worldwide.

Applications

The Track Adjuster Grease Cylinder for Caterpillar 320D 239-4390  is widely used in:

· Excavation projects

· Mining operations

· Quarry sites

· Infrastructure construction

· Earthmoving projects

· Heavy-duty construction environments

It is designed to maintain reliable track tension and improve undercarriage stability under demanding working conditions.

FAQ

1. Is this grease cylinder directly compatible with Caterpillar 320D?

Yes. This model is manufactured according to OEM reference number 239-4390 and is suitable for Caterpillar 320D, 320D L, and related models.

2. What causes grease cylinder leakage?

Common causes include worn seals, rough internal cylinder surfaces, rod corrosion, excessive impact loads, or poor-quality materials. Proper sealing design and accurate machining are critical for long service life.

3. Do you support OEM customization?

Yes. We support OEM and ODM manufacturing, including customized logo marking, paint color, packaging, and special material requirements.

4. How do you ensure product quality?

Our factory performs strict inspections during raw material selection, machining, assembly, and final pressure testing before shipment.

5. Can you supply other undercarriage parts together?

Yes. Besides the Track Adjuster Grease Cylinder for Caterpillar 320D 239-4390 , we also manufacture track rollers, carrier rollers, sprockets, idlers, and track chains for various excavator and bulldozer models.

Contact Us

If you are looking for a reliable supplier of excavator undercarriage parts, Quanzhou Qiansheng Heavy Industry Machinery Co., Ltd. is ready to support your business with stable quality and professional export service.

Contact Person:  Manager Wu
WhatsApp / Mobile:  +86 13799896866