OEM Replacement 207-30-00550 Top Roller with Heat Treatment HRC 52-58 for Heavy-Duty Construction Excavator Undercarriage
Price:
US$19-34
MOQ:
1PCS
Delivery Time:
7-15Days
Brand:
ZTMC
Product Description
PC300-7LC PC300-7K Top Roller OEM Replacement 207-30-00550
This heavy-duty carrier top roller is a 1:1 OEM direct replacement for PC300-7LC long crawler and PC300-7K heavy-duty excavators, with standard OEM part number 207-30-00550. Perfectly matching original mounting dimensions and bolt holes, it requires no cutting, drilling or any on-site modification. It effectively supports track operation, avoids track sagging and walking vibration, and optimizes overall undercarriage running performance for long-hour heavy-load engineering fleets.
Specification
| OEM Part Number | 207-30-00550 |
|---|---|
| Applicable Excavator Model | PC300-7LC / PC300-7K |
| Machining Tolerance | ±0.01mm CNC ultra-precision machining |
| Heat Treatment Process | Overall quenching + stress relief tempering |
| Applicable Working Scenarios | Large quarry mining, high-grade road construction, heavy earthmoving, muddy wet sites, high-impact harsh working conditions |
| Installation Type | Plug-and-play OEM direct replacement |
Applicable Working Environments
PC300-7LC long track and PC300-7K reinforced heavy-duty excavators adopt upgraded lengthened crawler and strengthened chassis, bearing higher track load than standard PC300-7 machines. They are widely applied in large quarry projects, infrastructure construction and continuous heavy earthmoving work. Long-term gravel extrusion, muddy water soaking and frequent walking impact bring extreme load to undercarriage top rollers. This specially reinforced top roller is customized for high-load long-track chassis, keeping stable running performance all day long.
Core Production & Heat Treatment Process
Adopt extra thickened one-piece forging steel blank to adapt to super high load of long-track and reinforced chassis. Dual standard heat treatment is adopted: integral quenching improves surface hardness to resist long-term gravel abrasion; secondary tempering eliminates internal metal stress to prevent shell deformation under strong impact. All mounting holes and matching contact surfaces are processed by precision CNC machine tools, with tolerance strictly controlled within 0.01mm, fully matching original factory OEM assembly standards.
On-site Installation Steps
- Raise the excavator track with a hydraulic jack to separate track from ground and release partial track tension
- Remove fixing bolts of the old top roller, take out original roller and clean sediment and dust on the mounting base
- Place the new top roller in original installation position, align reserved bolt holes accurately
- Lock all bolts with standard factory torque, reset track tension and conduct track idle running test
- Check no abnormal vibration or friction noise to finish whole installation work
Product Advantages
- Universal fit for PC300-7LC long track and PC300-7K reinforced heavy-duty models
- Thickened roller shell structure bears higher chassis load without deformation
- High-precision overall machining eliminates track offset and walking vibration
- Heavy-duty floating seal isolates external mud and dust steadily
- Complete dual heat treatment greatly extends service life under heavy working conditions
- Direct bolt-on installation saves field maintenance time and labor cost
Customer Application Case
A professional large quarry fleet owns dozens of PC300-7LC and PC300-7K excavators working with full-load operation every day. After matching with our OEM-standard top rollers, all undercarriage accessories keep stable operation over 1800 working hours with intact shell and stable sealing performance, cutting annual undercarriage overall maintenance cost by 34%.
FAQ
Q1: Can this top roller fit PC300-7LC and PC300-7K universally?
A: Yes, OEM part number 207-30-00550 is exclusive for these two upgraded heavy-duty models, 100% consistent installation size, no modification required.
Q2: What is the difference between this roller and ordinary PC300-7 top roller?
A: This roller adopts thickened shell and reinforced internal structure, specially upgraded for higher load of long track and K-version reinforced chassis, with better impact resistance and durability.
Q3: Can you provide official inspection reports for bulk orders?
A: Yes, we can provide hardness test reports and dimensional inspection reports to support customer bulk order quality inspection and customs clearance.
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Get in Touch
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Company
Nan'an Zhongte Engineering Machinery Factory
Location
No. 105, Shangdian Street, Changfu Village, Xiamei Town, Nan'an City, Quanzhou City, Fujian Province
Contact Person
Mr.