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ApplicationOur products consist of undercarriage parts for bulldozer and excavator such as Track link,Track roller,Carrier roller,Sprocket,ldler,Track shoe,Cutting edge,End bit,Tooth Bucket,Track pin,Track bush, Engine parts,Track boit&nuts.U-bolt,Centre bolt,Wheel bolt and other related parts.
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About UsFujian Yongsheng Machinery Parts Co., Ltd. is located in Quanzhou City, Fujian Province, which is one of the most developed regions of China Machinery Manufacturing.The company was established in 2003, after approximately 10years' effort, and now it is one of the leading construction machinery parts auto parts manufacturers in CHINA.
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BlogSuppliers who pass Quality ManagementSystem Certification, and have onsitematerials or finished products inspected,as certified by independent third parties.
Lovol FR220 Excavator Undercarriage Parts: The Ultimate Guide to Crawler Track Longevity
Lovol FR220 Excavator Undercarriage Parts: The Ultimate Guide to Crawler Track Longevity
Jun 24,2026
Lovol FR220 Excavator Undercarriage Parts: The Ultimate Guide to Crawler Track Longevity
As displayed in the professional equipment showcase of image_7c28c6.png, a crawler excavator's undercarriage is a complex, high-precision engineering system. For popular 22-ton class machinery like the LOVOL FR220 excavator, the undercarriage parts bear 100% of the machine's operating weight while enduring severe friction from rock, mud, and abrasive soils. Managing these components properly is the single most effective way to lower your fleet's operating cost per hour.
To help international distributors, fleet managers, and workshop owners understand these critical components, here is a science-based breakdown of the essential excavator undercarriage parts and their roles in heavy-duty operations.
1. Decoding the "Four Rollers and One Track" System
The core movement and stability of a crawler excavator depend on a group of components traditionally known in the heavy machinery industry as the undercarriage group. Let us break down the specific components illustrated in image_7c28c6.png:
- Track Roller (Bottom Roller): Positioned at the bottom of the track frame, track rollers guide the moving track chain and support the immense weight of the excavator. High-quality track rollers feature deep induction-hardened shells to resist continuous ground-level abrasion.
- Carrier Roller (Top Roller): Mounted on top of the track frame, the carrier roller holds up the slack of the track chain, preventing it from sagging or whipping during high-speed travel.
- Front Idler: Located at the front of the undercarriage, the idler works alongside the track tensioner cylinder. It guides the track loop smoothly into place and absorbs dynamic frontal impacts when traveling over rocks or uneven obstacles.
- Sprocket & Segments: Driven directly by the travel motor and final drive, the sprocket teeth engage perfectly with the track chain pins to propel the machine forward or backward.
- Track Chain Link Assembly: The backbone of the traction drive. Premium track chains utilize Sealed and Lubricated Track (SALT) technology, locking internal grease inside the pin-and-bushing joints to drastically minimize internal pitch elongation.
- Track Shoe (Track Pad): The direct contact point with the earth. Depending on the terrain, triple-grouser track shoes are typically chosen for construction environments to distribute weight evenly and minimize soil disturbance.
2. The Science of Quality Management and Component Inspection
Why do undercarriage parts fail prematurely on certain jobsites? The difference lies entirely in metallurgical precision and quality control standards. As emphasized by the technical criteria in image_7c28c6.png, high-performance aftermarket parts must pass strict Quality Management System Certifications.
Heavy-duty excavation parts demand independent third-party onsite inspections of raw materials and finished products. Premium parts are manufactured using strictly monitored forged steel alloys, followed by state-of-the-art dual-medium quenching heat treatments. This ensures a perfect combination: a rock-hard exterior wear layer to fight abrasion, paired with a tough, ductile internal core to absorb violent shock loads without cracking.
3. Preventive Maintenance Tips for 20-Ton Class Excavators
To maximize the operational uptime of your Lovol FR220 or similar crawler equipment, implement these two non-negotiable field practices:
- Clean Out Packed Mud Daily: Packed mud dries up overnight, locking track rollers and preventing them from rotating. When the excavator moves the next morning, the track links drag over a frozen roller, grinding a permanent flat spot onto the roller shell and ruining the component.
- Check Track Tension Weekly: Tight tracks increase friction exponentially, speeding up wear on pins, bushings, and sprockets while wasting valuable engine fuel. Adjust track sag precisely to the factory specifications based on your specific jobsite environment (looser for mud, tighter for solid rock).
Conclusion: Partnering with Certified Heavy Machinery Component Suppliers
Maintaining a profitable earthmoving operation comes down to component reliability. Investing in certified, third-party inspected undercarriage parts ensures that your heavy machinery operates with maximum uptime, lower maintenance intervals, and an optimized total cost of ownership.
Looking for Heavy-Duty Excavator Parts Wholesale?
Contact our engineering support team today to receive a factory-direct quote on premium, third-party certified undercarriage solutions engineered perfectly for your crawler equipment fleet!
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Andy Shi
No.8 Binjiang Street, Binjiang Industrial Zone, Xiamei Town, Nan An City, Quanzhou City, Fujian Province, China
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