 |
| Item | Specification |
|---|---|
| Part Number | 4638433 |
| Product Name | Top Carrier Roller / Upper Track Roller |
| Product Type | Undercarriage Component (Track System) |
| Compatible Machine Models | Hitachi EX1200-6, EX1200-7 (Large Mining Excavator) |
| Application | Supports the upper strand of the track chain, reducing track sag and vibration. |
| Track Type | For Heavy Duty Mining Undercarriage |
| Position | Top / Carrier |
| Single Weight | 95 kgs (209.4 lbs) |
| Material | High-Strength Forged Alloy Steel |
| Features | Induction hardened wear-resistant surface; Advanced multi-lip sealing system (floating seals) to prevent lubricant leakage and contamination. |
| Lubrication | Sealed & Lubricated (Maintenance free) |
| Interchange | Direct OEM replacement for Hitachi EX1200 series |
| Industry | Surface Mining, Quarrying, Heavy Construction |
Hitachi EX1200-6 carrier roller
4638433 top roller
EX1200-7 upper track roller
Mining excavator undercarriage parts
Heavy duty carrier roller for Hitachi
Replacement track roller EX1200
Note:
This Top Carrier Roller (Part No. 4638433) is a critical upper undercarriage component specifically engineered for the Hitachi EX1200-6 and EX1200-7 large mining excavators.
Function: It carries the weight of the track chain on the top side, ensuring proper alignment between the drive sprocket and the idler, reducing chain fatigue and extending overall undercarriage life.
Durability: Constructed from premium forged alloy steel and heat-treated for maximum hardness (HRC 55-62) on the tread surface.
Sealing System: Equipped with group II metal floating seals to retain oil lubrication and keep out abrasive debris (mud, sand, slurry) common in mining sites.
Service Life: Proper maintenance of the carrier roller is essential to prevent track derailment and reduce operating costs in abrasive environments.
Installation: Use standard heavy equipment tools; torque mounting bolts to Hitachi OEM specifications.
Please verify the compatibility with your specific machine Serial Number (SN) and link size before purchase.
