Product Description
| Material | 50mn,40mn2 |
| Part No. | 2270-9402；2270-9402A；270-00047A |
| Finish | Smooth |
| Colors | Black, yellow, or customized |
| Technology | Forging/Casting |
| Surface Hardness | HRC55-60,depth: 8mm-12mm |
| Warranty time | 12 Months |
| Delivery Time | 25-30 days |
DH300 TOP ROLLER PART NO.:270-00049
Product Overview
Part Number: 270-00049
Fit Machine: Doosan DH300 Medium Excavator
This carrier roller (top roller) is a heavy-duty aftermarket replacement undercarriage wear part designed for Doosan DH300 crawler excavators. Manufactured from high-strength forged alloy steel with full-surface deep quenching heat treatment, it adopts a double multi-layer leak-proof oil seal structure. The roller supports the weight of the upper track, lowering track vibration, abrasion and derailment during municipal, road and earthmoving construction operations.
Core Advantages
Precision Machined Replacement Installation Dimensions
Roller diameter, spindle length and mounting hole sizes are precisely machined to fit Doosan DH300 excavators seamlessly. Direct bolt-on installation is available without cutting or any modification.
Deep Hardened Roller Surface
The roller body undergoes carburizing quenching treatment to achieve high surface hardness, extending service life significantly on muddy and rocky construction sites.
Double Layer Anti-Leak Oil Seal
High-temperature resistant rubber seals block mud and sediment ingress, effectively prevent grease leakage and prolong lubrication maintenance intervals.
Heavy-Duty Internal Bearing
Delivers powerful load-bearing capacity and smooth stable rotation to avoid track jumping and track chain detachment.
Strict Factory Inspection
Each top roller passes hardness testing, pressure testing and leak testing before delivery to guarantee consistent uniform quality.
Compatible Equipment
This aftermarket replacement top roller fits Doosan DH300 excavator perfectly.
If you cannot confirm compatibility, send your machine model and photos of your old top roller to our sales team for quick professional model matching.
Application
Replacement upper track carrier roller for Doosan DH300 medium excavators, widely used in municipal engineering, road construction, earthmoving and stone quarry machinery chassis systems.
Packing & Shipping
Adopt shockproof export wooden cases and fumigated wooden pallets for outer packaging.
We support bulk wholesale orders, mixed full-set undercarriage spare parts orders, fast production lead time and global door-to-door delivery service.
Why Choose MUYE Aftermarket Undercarriage Parts
MUYE Machinery has specialized in aftermarket excavator chassis spare parts for over 10 years:
- Complete product lineup including top rollers, track rollers, idlers, sprockets and track shoes compatible with Doosan, Komatsu, Hitachi, CAT, Kobelco and more brands
- Direct factory supply with competitive wholesale prices, no extra markup from middlemen
- All aftermarket undercarriage wear parts are covered by a 12-month quality warranty
- Professional technical support for accurate model matching and installation guidance
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