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{"title":"Doosan DX225LC OEM Direct Replacement Top Roller with HRC50-58 Surface Hardness","imgUrl":"https:\/\/img.chinax.com\/nimg\/6e\/fb\/4093183492d74e85bfce2882dcfd-200x200-1\/doosan_dx225lc_oem_direct_replacement_top_roller_with_hrc50_58_surface_hardness_and_cnc_precision_machining.jpg","attrs":{"Brand Name":"ZTMC","Model Number":"DX225LC-3\/DX225LC-5","Certification":"ISO9001,ISO9001-9002","Place of Origin":"CHINA"}}
{"title":"Doosan DX200A DX200LC OEM Replacement Top Roller with 50Mn Wheel Body and CNC","imgUrl":"https:\/\/img.chinax.com\/nimg\/10\/1d\/4cd35a2e5d968553a66d65dc21b0-200x200-1\/doosan_dx200a_dx200lc_oem_replacement_top_roller_with_50mn_wheel_body_and_cnc_precision_processing.jpg","attrs":{"Brand Name":"ZTMC","Model Number":"DX200A\/DX200LC","Certification":"ISO9001","Place of Origin":"CHINA"}}
{"title":"Doosan OEM Replacement Top Roller with 40Mn Material and 1 Year Warranty for","imgUrl":"https:\/\/img.chinax.com\/nimg\/bb\/49\/37e6716ce3837486f21f6274d8b8-200x200-1\/doosan_oem_replacement_top_roller_with_40mn_material_and_1_year_warranty_for_dx220lc_9_dx225lc_9_excavators.jpg","attrs":{"Brand Name":"ZTMC","Model Number":"DX220LC-9 DX225LC-9 DX200A DX200LC DX225LCA DX260LCA","Certification":"ISO9001","Place of Origin":"CHINA"}}
{"title":"CAT 120B Top Roller OEM Direct Replacement Heat Treated and Coated with CNC","imgUrl":"https:\/\/img.chinax.com\/nimg\/94\/4a\/c06ac189ccbbd63fe2fbff106522-200x200-1\/cat_120b_top_roller_oem_direct_replacement_heat_treated_and_coated_with_cnc_ultra_precision_machining_for_excavators.jpg","attrs":{"Brand Name":"ZTMC","Model Number":"CAT120B\/E120B","Certification":"ISO9001","Place of Origin":"CHINA"}}
{"title":"CAT311 OEM Direct Replacement Top Roller with Heat Treatment HRC 52-58 and CNC","imgUrl":"https:\/\/img.chinax.com\/nimg\/70\/ce\/5e8858073240c616404e5d2b0d36-200x200-1\/cat311_oem_direct_replacement_top_roller_with_heat_treatment_hrc_52_58_and_cnc_ultra_precision_machining_for_excavator_undercarria.jpg","attrs":{"Brand Name":"ZTMC","Model Number":"CAT 311 \/ 311B \/ 311C","Certification":"ISO9001","Place of Origin":"CHINA"}}
{"title":"OEM Replacement Part 41-7345 Excavator Top Roller with Heat Treated Coating and","imgUrl":"https:\/\/img.chinax.com\/nimg\/42\/83\/4431c76b03e761bd63366366f115-200x200-1\/oem_replacement_part_41_7345_excavator_top_roller_with_heat_treated_coating_and_cnc_ultra_precision_machining_c2_b10_01mm.jpg","attrs":{"Brand Name":"ZTMC","Model Number":"E312B\/E313B\/E120C\/E313C\/E120B\/E313C","Certification":"ISO9001","Place of Origin":"CHINA"}}
black,Yellow/Black,Black or Yellow,yellow,Black/Yellow
Brand Name
ZTMC
Model Number
PC200-5/PC200-6
Certification
ISO9001
Place of Origin
CHINA
Komatsu PC200-5 PC200-6 Top Roller, OEM Replacement Carrier Roller 20Y-30-00022 for Construction & Mining
This top roller (carrier roller) is a direct OEM replacement for Komatsu PC200-5 and PC200-6 excavators, with standard part number 20Y-30-00022. It matches original installation dimensions exactly and requires no on-site modification. Engineered for heavy-duty undercarriage support, it delivers stable performance in long-term, high-load construction and mining operations.
Ideal for harsh sites with heavy impact, muddy water, and abrasive gravel. Ordinary aftermarket rollers often fail prematurely due to track sagging, abnormal vibration, shaft seizing, and seal leakage--caused by continuous friction, water erosion, and shock loads. This roller is purpose-built to resist these failure modes.
Production & Heat Treatment Process
Integrated Forging Blank: Ensures structural integrity and impact resistance.
Dual Heat Treatment:
Quenching: Raises surface hardness to HRC52-58 for superior wear resistance against gravel and sediment.
Tempering: Eliminates internal stress to prevent shell cracking under repeated impact.
Ultra-Precision Machining: All shafts, mounting holes, and contact surfaces are CNC-machined to ±0.01mm tolerance, fully aligning with OEM standards.
Key Benefits
Eliminates track vibration and sagging from dimensional inaccuracies
Prevents oil leakage and shaft rust in humid, muddy conditions
Reduces unplanned downtime caused by roller shell fracture
Enables fast, tool-free replacement to cut maintenance time
Extends service life by 2-3× vs. generic aftermarket rollers
Customer Case
A Southeast Asian construction company operated 12 units of PC200-5/6 fleets with generic rollers, which failed within 650-800 working hours. After switching to our OEM-spec top rollers, all units ran stably for over 1900 working hours without seal leakage or shell damage, cutting annual undercarriage maintenance costs by 35%.
Frequently Asked Questions
Q1: Does this roller fit both PC200-5 and PC200-6?
A: Yes. Part No. 20Y-30-00022 is fully compatible with both models; no gaskets or adjustments needed.
Q2: What makes it better than generic rollers?
A: Generic parts skip tempering and have tolerances over 0.05mm. Our dual heat treatment + 0.01mm precision ensures durability in harsh conditions.
Q3: Can you provide batch inspection reports?
A: Yes. We supply heat treatment test reports and dimensional inspection datasheets for all bulk orders.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
2015
Total Annual:
5000000-8000000
Employee Number:
100~120
Ecer Certification：
Verified Supplier
Nanan Zhongte Construction Machinery Factory is located in Quanzhou, Fujian Province, China — a city recognized by UNESCO as the starting point of the ancient Maritime Silk Road and also a vibrant metropolis with an economic output exceeding one trillion yuan. As a large enterprise specializin... Nanan Zhongte Construction Machinery Factory is located in Quanzhou, Fujian Province, China — a city recognized by UNESCO as the starting point of the ancient Maritime Silk Road and also a vibrant metropolis with an economic output exceeding one trillion yuan. As a large enterprise specializin...
