Keep your Caterpillar 320L excavator productive with our CAT320L Track Roller (Bottom Roller / Lower Roller), a heavy-duty aftermarket replacement engineered to meet OEM specifications for the CAT 320 series undercarriage. Built for 20-ton class machines, this roller carries the excavator’s full weight, guides the track chain, and ensures stable movement across construction, mining, and earthmoving job sites.

Key Specifications:

• Compatible Models:​ Caterpillar CAT 320, 320L, 320B, 320N, 320C, 320D, 320DL, 321, 323, E200B and related 315–323 series excavators
• Reference Part Numbers:​ 348-1867, 163-4143, 8E-5034, 117-5045, 1R8669, 286-9823, 209-3386, 991109, CR5109, CR5572, CR6676
• Type:​ Single flange / double flange bottom track roller (track roller group available)
• Material:​ High-strength forged alloy steel — 40Mn2 / 35MnB / 50Mn (selected for exceptional yield strength, toughness, and wear resistance)
• Surface Hardness:​ HRC 52–58 (induction hardened)
• Hardened Depth:​ 8–12 mm (uniform case depth prevents rapid wear-through)
• Core Hardness:​ HB 280–350 (through-hardened and tempered for impact toughness)
• Manufacturing Process:​ Precision forging + heat treatment + CNC machining + sealed lubrication system
• Sealing System:​ Double-labyrinth seals + floating face seals with high-temperature lithium-complex grease — prevents contamination ingress and retains lubricant
• Dynamic Load Capacity:​ Up to 18,000 kg per roller
• Certification:​ ISO 9001:2000
• Warranty:​ 12 months / 2,000 working hours
• Color:​ Yellow or black (custom colors available)

Why Choose Our CAT320L Track Roller?

• Accurate OEM-Spec Fitment:​ Manufactured to Caterpillar’s original dimensions for plug-and-play installation — no modifications, no downtime, no fitment guesswork .
• Exceptional Wear Resistance:​ Deep, uniform HRC 52–58 induction-hardened surface resists abrasive wear from track chain contact, even in rocky, muddy, and high-abrasion conditions .
• Lifetime Lubrication, Zero Leakage:​ High-performance duo-cone floating seal system locks in grease and locks out mud, sand, and water — minimizing maintenance and extending service life .
• Heavy Load Capacity:​ Engineered to withstand the full 20-ton load of a CAT 320L during walking and working operations, with stable performance under continuous pressure .
• Factory-Direct Pricing:​ Source straight from our production line in Fujian — genuine-level quality at a fraction of Caterpillar dealer prices, with no middlemen markup.
• Full Undercarriage Solution:​ We supply not just track rollers, but also carrier rollers, front idlers, sprockets, track chains, track shoes, bucket teeth, and cutting edges for the entire Caterpillar excavator range .

Applications:

Designed for Caterpillar 320L and 320-series excavators operating in construction, mining, quarrying, road building, large-scale earthmoving, and demolition. Whether you’re digging foundations, loading trucks, or working in rocky terrain, our track roller delivers the durability and stability your undercarriage depends on.

Quality Assurance:

Every roller passes through a rigorous multi-stage inspection process — material strength verification, surface hardness testing (HRC 52–58), dimensional accuracy checks, seal tightness testing, and load-bearing performance validation . Strict quality control ensures each product meets Caterpillar OEM standards before shipment .

Ordering & Support:

• MOQ:​ 1 piece (sample orders welcome)
• Delivery:​ 10–15 days FOB Xiamen; 1–3 days if in stock
• Payment:​ T/T, L/C, Western Union, PayPal, Money Gram
• Packaging:​ Standard export fumigated wooden pallet / wooden case
• Fitment Verification:​ CAT 320-series roller configurations vary by sub-model and production year. Share your machine’s correct model number, machine serial number, or any numbers on the existing part — or send us dimensions/drawings — and we’ll confirm the exact match before shipment .

Order Your CAT320L Track Roller Today!

Don’t let a worn roller compromise your undercarriage. A failing bottom roller can lead to track misalignment, accelerated sprocket and chain wear, and costly downtime. Contact us for a competitive factory quote, or add to cart now. We respond to all inquiries within 24 hours and ship worldwide.