This carrier top roller is a 1:1 OEM direct replacement for EX220-3 excavator, matched with official part number 9062407. It fits original mounting holes and assembly dimensions perfectly without any cutting, drilling or on-site secondary modification. This undercarriage spare part stabilizes track operation and solves common walking failures for long-running EX220-3 excavator fleets.

EX220-3 excavators are widely used in medium earthmoving projects, quarry exploitation, municipal road reconstruction and wet muddy job sites. Long-term abrasive gravel friction, muddy water erosion and continuous walking impact will cause ordinary aftermarket top rollers to suffer track vibration, track sagging, shaft stuck and premature seal oil leakage. This heavy-duty top roller is professionally manufactured to adapt to these harsh working conditions.

Adopt one-piece integrated forging steel blank to enhance overall structural strength and impact resistance. Standard dual heat treatment technology is adopted: integral quenching improves surface hardness to resist long-term gravel wear; follow-up tempering eliminates internal residual stress to prevent roller shell cracking under frequent impact. All mounting holes and matching contact surfaces are processed by high-precision CNC machines, with machining error strictly controlled within 0.01mm, fully consistent with original factory OEM standards.

1. Raise the excavator track with a hydraulic jack to separate track from ground and release partial track tension
2. Remove fixing bolts of the old top roller, take out damaged roller and clean dust and sediment on the mounting base
3. Place the new top roller in original position, align reserved bolt holes accurately
4. Lock all fixing bolts with standard torque, reset track tension and conduct track idle running test
5. Check no abnormal vibration or friction noise to complete installation

• Accurate original size matching avoids track deviation and walking shaking
• Reinforced floating seal system blocks muddy water and dust intrusion to prevent oil leakage
• Complete heat treatment effectively reduces roller shell fracture risk under heavy impact
• Direct bolt-on installation greatly shortens on-site maintenance time and labor cost

A Southeast Asian machinery maintenance company maintains batches of EX220-3 old-model excavators. Previously adopted generic top rollers failed within 700-830 working hours due to incomplete heat treatment and poor machining accuracy. After switching to our OEM-spec top rollers, all parts run stably over 1800 working hours without oil leakage or shell damage, cutting annual undercarriage maintenance cost by 33%.