Wear Parts for Excavator
Undercarriage parts

Caterpillar Excavator And Dozer Undercarriage Spare Parts Track Idler

This heavy-duty undercarriage replacement part functions as a front idler, tensioner, or recoil spring idler to accurately guide the track chain and prevent derailment in harsh conditions.Material & Process: Precision casting and forging utilizing high-strength 40SiMnTi alloy steel.Advanced Heat Treatment: Strict quench-tempering delivers a deep hardened wear surface (HRC 52-58, depth 8mm-12mm).Operational Durability: Effectively supports machine weight and absorbs operational impacts with superior resistance to bending, breakage, and friction.
  • brand:

    Caterpillar
  • color:

    Black or yellow
  • Model:

    D6H, D6T, D6R, D8N, D8T, D9N, D9T
  • Warranty:

    6 months--one year
  • Process:

    Forging & casting
  • Hardness Depth:

    8-12mm
  • Surface Hardness:

    HRC52-58
  • Material:

    40SiMnTi
  • Moving Type:

    Crawler excavator and dozer
  • products details

Product Description

Engineered for heavy-duty applications, our excavator and dozer track idlers (also known as tensioner idlers or recoil spring idlers) are fully compatible with Cat D6H, D6T, D6R, D8N, D8T, D9N, and D9T. We offer flexible manufacturing configurations, including wheel rim casting and welding, wheel rim grinding ring welding, and full wheel body casting.Key Engineering Advantages:Alloy Steel & Heat Treatment: High-precision alloy steel with rigorous heat treatment ensures optimal surface hardness and a proper hardened depth layer for harsh environments.Floating Seal System: Integrated with a high-quality shaft and bushing to maximize oil retention and significantly reduce internal friction.Sliding-Type Leg Design: Effectively lowers contact pressure and absorbs severe operational impacts to minimize general wear and tear.




Heavy Duty Bulldozer Center Cutting Edge


Features

  • High-Strength Alloy Steel
    Crafted from premium 40SiMnTi material to ensure high structural strength and exceptional wear resistance against bending and breakage in tough working conditions.
  • Lifetime Lubrication System
    Equipped with a high-quality shaft, bushing, and floating seal group to ensure lifetime lubrication, reducing operating friction and eliminating daily idler maintenance.
  • Optimized Structural Design
    Engineered with a specialized sliding-type leg design to effectively reduce contact pressure, minimize overall wear and tear, and prevent severe operational impact.
  • OEM Certified Quality
    Strictly manufactured and carefully designed under ISO9001 certification to provide genuine mechanical properties, ensuring reliable track alignment and tension control for Caterpillar machinery.
  • Dynamic Shock Buffering
    Engineered to seamlessly compress the tension spring under excessive force to act as a reliable buffer, effectively reducing the impact of the walking process and preventing track chain derailment.

  • Application

    • Heavy Machinery: Ideal for repairing and maintaining Caterpillar crawler excavators and bulldozers undercarriage track systems.
    • Specific Cat Models: Perfectly compatible with Cat dozer series including D6H, D6T, D6R, D8N, D8T, D9N, and D9T.
    • Harsh Environments: Engineered to provide stable track guidance and reliable tensioning for earthmoving equipment operating in extreme working conditions.
    • Undercarriage Repair: Essential for replacing worn front or rear idlers to maintain proper track chain tension and prevent derailment during heavy-duty operations.


    Construction Machinery Spare Parts Track Roller


    Product Parameters


    Name
    Caterpillar Excavator And Dozer Undercarriage Spare Parts Track Idler
    Material
    Premium 40SiMnTi Alloy Steel
    Process Precision Forging, Casting & Quench-Tempering Heat Treatment
    Painting Color Standard Black, Yellow, or Customized to Client Request
    Finish Smooth Machined Surface
    Surface Hardness HRC 52-58 (Deep Hardened Wear Surface: 8mm-12mm)
    Quality Guarantee  One year
    Delivery Time Within 10--20 days after sales contract establishment
    Payment Terms T/T, L/C, PayPal, Western Union, D/P
    Usage 
    Mining, Construction, Earthmoving, and Heavy-Duty Crawler Equipment Operations

    Why Choose us?

    Quench-tempering processes to guarantee genuine mechanical properties
    High hardness :HRC52-58,deepth:8mm-12mm 
    Deep hardened wear surface 
    High strength and superior wear resistence to bending and breakage
    Strict Quality Control
    Precise design and carefully manufactured
    Certificated by ISO9001:2008
    Produce as per client's samples,designs and drawings


    Idler List
    Caterpillar & Komatsu Applications
    Part No. Ref No. Part No. Model Description (kg)
    Caterpillar
    SJI2900 4I7337
    E110B,E120B,311,312 Idler Group 90
    SJI3000 CR5732 7Y1601,1132907 E200B,EL200B,315,318,320 Idler Group 135
    SJI3200 094-1384
    E240,E240B, -C Idler Group 120
    SJI3150 4C2084 CR5127 225-6.91"7.50" PITCH Idler Group 160
    SJI3420 4E8500 CR5132 235 Idler Group 270
    SJI3100 CR5786 115-6337 322B Idler Group 132
    SJI3300 CR5884 1028155 325 Idler Group 170
    SJI3400 CR6087 1028152, 7Y0762 330 Idler Group 240
    SJI3450 CR6597 1156366 345 Idler Group 255
    SJI1311 CR6403 1358903 350 Idler Group 270
    SJI3650 136-2429
    365 Idler Group 525
    SJI3750 194-1157 135-8904 375,385 Idler Group 590
    SJI3500 960253
    E300B Idler Group 198
    SJI5900 8J6562 2T0048,2154459 615/623 Bottom Idler Idler Group 77
    SJI5901 3G1086 2154458,2T0047 615/623 Center Idler Idler Group 40
    SJR1001 2T0046 3G7490 615/623 Upper roller Roller Group 18
    SJI5903 1447321, 8W4731 3G0897, 3J4778 631-657 Floor roller Roller Group 21
    SJI5902 9J1035
    633C,D BOTTOM IDLER Idler Group 80
    SJI8400 CR3004 9N4173 D3B,C,G/D4B,C,G Idler Group 110
    SJI8900 CR5420
    D5C-D5G Idler Group 175
    SJI8700 CR3189WB 7P9017 953 Idler Group 180
    SJI8701 CR3189 7T3501 WS3 D5B W/O BRACKETS Idler Group less bracket 135
    SJI8800 CR4007WB 7P2719 963 Idler Group 195
    SJI3600 CR4587 190-1534 D4H (475mm) Idler Group 81
    SJI3700 CR4585 190-1551 D4H (500mm) Idler Group 90
    SJI3800 CR4589 190-1546 D5H,D6M Idler Group 112
    SJI7800 CR4094 6L9210 D6D with brackets Idler Group 170
    SJI7700 8E4007
    D5H, 517 Skidder Idler Group 160
    SJI3900 CR4909 151-4587 D6H,D6R(545mm) Idler Group 147
    SJI4000 CR4616 6T3216 D6H,D6R(570mm) Idler Group 159
    SJI4100 CR4911 135-9896, 6Y2031 D7H, D7R(585mm) Idler Group 240
    SJI4200 CR4593 192-0216 D7H,D7R(628mm) Idler Group 260
    SJI1551 CR4096 6L9212 D8H,K W/ BRACKETS Idler Group 329
    SJI4300 CR4531 111-1729 D8N/R/T(620mm)-rear Idler Group 300
    SJI4301 244-1324
    D8N/R/T rear with Landfill guarding Idler Group 300
    SJI4400 CR4530 111-1730 D8N/R/T(698mm)-front Idler Group 350
    SJI4401 244-1323
    D8N/R/T-front with Landfill guarding Idler Group 350
    SJI4500 CR4681 125-4655 D9N/R/T Idler Group 450
    SJI4501 167-1947
    D9N/R/T with Landfill guarding Idler Group 450
    SJI7400 125-3537 9W9734 D10N/R/T Idler Group 590
    SJI7500-2 156-0313 9W9650 D11N/R/T Idler Shell Idler Shell 930
    Komatsu
    SJI1400 201-30-00012
    PC60-5 Idler Group 65
    SJI1500 203-30-00133
    PC100-5, 120-5,6 Idler Group 80
    SJI1600 205-30-00182 KM1641 PC180-2, 200-3 Idler Group 130
    SJI1700 20Y-30-00030 KM1642 PC200-5, 220-5 Idler Group 130
    SJI3101 20Y-30-00321 KM3299 PC220-7,8, PC228 Idler Group 130
    SJI1800 207-30-00071
    PC300-1,2,3 Idler Group 190
    SJI1900 207-30-00160 KM2018, KM1927 PC300, 280-3, 300-5 Idler Group 190
    SJI2000 208-30-00070
    PC400-3 Idler Group 290
    SJI2100 208-30-00200 KM1973 PC400-5, PC400 Idler Group 290
    SJI7100 101-30-61210X KM0914 D20 Idler Group 65
    SJI3117 113-27-31320 KM0840 D31-17, D30, D37 Idler Group 90
    SJI9208 128-04-0H92 IN3810 D39 Idler Group 150
    SJI9207 124-30-00102 124-30-00103 D39E,P-21 D41E,P-6 Early S/N Idler Group 124
    SJI9206 124-30-00105 124-30-00106 D41E,P-6 Late S/N Idler Group 160
    SJI9205 134-30-00201 KM6100 D61E,P Idler Group 228
    SJI8300 144-30-00038 KM834 D65 Idler Group 210
    SJI8300 14X-30-00112 KM2107 D65-12, D85SS-2, D85ESS-12 Idler Group 195
    SJI1550 17A-30-00040 KM836 D155 Idler Group 474
    SJI2200 195-30-00283 KM837 D355 Idler Group 650

    Production Show

    Excavator Lower Roller With Cast Iron Bushing


    Caterpillar excavator and dozer undercarriage spare parts track idler image display



    FAQ

    How does the tension idler assembly help protect the undercarriage of excavators and dozers?

    The tension idler effectively guides the track chain in and out of the track rollers, controls slack, and intermittently supports the machine's weight. Engineered with a sliding-type leg design and a recoil spring mechanism, it compresses to act as a buffer against heavy impacts. This prevents track chain derailment, ensures smooth sliding along the crawler frame, and reduces overall wear and tear.


    Do your front and rear idlers require regular lubrication maintenance during operation?
    No, our OEM track idler groups are designed to minimize your operating costs and downtime. They are equipped with a high-quality shaft, bushing, and a floating sealing system that ensures lifetime lubrication. This advanced seal group eliminates the need for daily idler maintenance while effectively reducing operating friction in demanding earthmoving environments.


    What heavy machinery models are your undercarriage track idlers compatible with, and what are your quality standards?

    Our OEM-standard idler wheels are perfectly compatible with a wide range of Caterpillar heavy machinery, including Cat dozer models like the D6H, D6T, D6R, D8N, D8T, D9N, and D9T. Manufactured under strict ISO9001:2008 quality control, we ensure precise design and carefully manufactured undercarriage parts, and we can also produce custom components based on specific client samples and drawings.


    Leave a message
    If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
    copyright © 2026 Xiamen Fortune Industrial Co., Ltd..all rights reserved. powered by dyyseo.com / sitemap / XML / Privacy Policy
    leave a message
    welcome to Fortune
    If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

    home

    products

    about

    contact