• Hitachi ZX870 ZX870H-5B ZX870H-5G Excavator Track Roller Bottom Roller Lower Roller Undercarriage 4473720 Replacement
  • Hitachi ZX870 ZX870H-5B ZX870H-5G Excavator Track Roller Bottom Roller Lower Roller Undercarriage 4473720 Replacement

Hitachi ZX870 ZX870H-5B ZX870H-5G Excavator Track Roller Bottom Roller Lower Roller Undercarriage 4473720 Replacement

Heavy-duty Track Roller (Bottom Roller / Lower Roller) for Hyundai R80, R80-7 and R80-7A excavators. Manufactured from high-strength 40Mn2 alloy steel with precision machining, heat treatment and reliable floating seal technology.

The track roller supports the machine weight, guides the track chain and ensures smooth travelling performance for 8-ton class excavators used in construction, landscaping and earthmoving applications.

Compatible with Hyundai R80 series excavators. Reference OEM number: 81N1-11010. Available in Single Flange (SF) and Double Flange (DF) versions according to track frame position.

Produced according to OEM-style dimensions with excellent wear resistance, stable sealing performance and long service life.

Please provide your machine serial number or existing OEM part number to confirm exact fitment.
$45.00 - 100.00
Quanzhou Red Hill Machinery Co., Ltd.

Quanzhou Red Hill Machinery Co., Ltd.

Main Products: Construction Machinery Parts
View Supplier
Year Established Established in 2012
Main Products Construction Machinery Parts
Employees 101-500 People
Factory Area > 50,000 m²
Annual Revenue US$10 Million - US$50 Million
Main Markets North America / Europe / Middle East & North Africa / Latin America
Details
Specifications
Trade Information

Product Overview

The Track Roller, also known as Bottom Roller or Lower Roller, is an important undercarriage component installed beneath the track frame of Hyundai R80 crawler excavators.

The roller carries the machine operating weight, supports the track chain and maintains correct crawler alignment during travelling and excavation operations.

For compact excavators like Hyundai R80, track rollers are exposed to:

  • Continuous machine loading
  • Uneven terrain impact
  • Soil and gravel abrasion
  • Mud and water contamination

A worn or damaged track roller may cause:

  • Track chain misalignment
  • Increased travelling vibration
  • Abnormal track noise
  • Uneven track wear
  • Accelerated wear of sprocket and idler

Our Hyundai R80 track rollers are manufactured with professional undercarriage production technology to provide reliable aftermarket replacement solutions for dealers, repair workshops and equipment owners.


Key Features & Benefits

Wide Compatibility

Designed for:

  • Hyundai R80
  • Hyundai R80-7
  • Hyundai R80-7A
  • Hyundai R80CR-9

Reference OEM Number:

  • 81N1-11010


Single & Double Flange Options

Available configurations:

  • Single Flange (SF)
  • Double Flange (DF)

Suitable for different positions on the track frame.


High Strength Alloy Steel Construction

Manufactured from:

40Mn2 Alloy Steel

Advantages:

  • High load-bearing strength
  • Excellent impact resistance
  • Strong fatigue resistance
  • Extended service life

Advanced Heat Treatment

The roller tread surface is induction hardened:

  • Surface hardness: HRC 52-58
  • Hardening depth: 5mm-10mm

Improves resistance against:

  • Gravel abrasion
  • Hard soil wear
  • Continuous operation impact

Reliable Floating Seal System

Equipped with:

  • Heavy-duty floating oil seal
  • High-quality bushing
  • Lifetime lubrication system

Designed to prevent:

  • Oil leakage
  • Dust intrusion
  • Water contamination

OEM-Style Direct Replacement

Manufactured with:

  • Accurate roller dimensions
  • Correct shaft size
  • Standard mounting structure

Provides direct bolt-on replacement without modification.


Technical Specifications

Item Specification / Detail
Product Type Excavator Undercarriage Track Roller
Machine Model Hyundai R80 Excavator
Applicable Machine Weight Approx. 8 Ton Class
Roller Structure Heavy-duty Steel Body with Precision Machining
Material Grade 40Mn2 Alloy Steel
Manufacturing Process Forging / Casting + CNC Machining
Heat Treatment Induction Hardening
Surface Hardness HRC 52-58
Hardening Depth 5mm-10mm
Seal System Heavy-duty Floating Oil Seal
Lubrication System Lifetime Internal Lubrication
Bearing Structure Hardened Shaft + Wear-resistant Bushing
Quality Inspection Dimension, Hardness and Sealing Inspection
Flange Type Single Flange (SF) / Double Flange (DF)
Installation OEM Standard, Bolt-on Direct Replacement
Shipping Note Heavy Component — Sea Freight Recommended

Product Name
Track Roller
Part Type
Bottom Roller / Lower Roller
Application Brand
Hitachi
Compatible Models
Hitachi ZX870 / ZX870H-5B / ZX870H-5G
Machine Class
Approx. 80 Ton Excavator
OEM No.
4473720
Replacement No.
ZX870TR
Flange Type
Single Flange (SF) / Double Flange (DF)
Application
Construction / Mining / Earthmoving
MOQ
1 Pieces
Lead Time
in stock
Supply Ability
10000 Pieces
Shipping Port
Xiamen, China
Trade Terms
FOB, EXW
  • Hitachi ZX870 ZX870H-5B ZX870H-5G Excavator Track Roller Bottom Roller Lower Roller Undercarriage 4473720 Replacement

Description

Product Overview

The Track Roller, also known as Bottom Roller or Lower Roller, is an important undercarriage component installed beneath the track frame of Hyundai R80 crawler excavators.

The roller carries the machine operating weight, supports the track chain and maintains correct crawler alignment during travelling and excavation operations.

For compact excavators like Hyundai R80, track rollers are exposed to:

  • Continuous machine loading
  • Uneven terrain impact
  • Soil and gravel abrasion
  • Mud and water contamination

A worn or damaged track roller may cause:

  • Track chain misalignment
  • Increased travelling vibration
  • Abnormal track noise
  • Uneven track wear
  • Accelerated wear of sprocket and idler

Our Hyundai R80 track rollers are manufactured with professional undercarriage production technology to provide reliable aftermarket replacement solutions for dealers, repair workshops and equipment owners.


Key Features & Benefits

Wide Compatibility

Designed for:

  • Hyundai R80
  • Hyundai R80-7
  • Hyundai R80-7A
  • Hyundai R80CR-9

Reference OEM Number:

  • 81N1-11010


Single & Double Flange Options

Available configurations:

  • Single Flange (SF)
  • Double Flange (DF)

Suitable for different positions on the track frame.


High Strength Alloy Steel Construction

Manufactured from:

40Mn2 Alloy Steel

Advantages:

  • High load-bearing strength
  • Excellent impact resistance
  • Strong fatigue resistance
  • Extended service life

Advanced Heat Treatment

The roller tread surface is induction hardened:

  • Surface hardness: HRC 52-58
  • Hardening depth: 5mm-10mm

Improves resistance against:

  • Gravel abrasion
  • Hard soil wear
  • Continuous operation impact

Reliable Floating Seal System

Equipped with:

  • Heavy-duty floating oil seal
  • High-quality bushing
  • Lifetime lubrication system

Designed to prevent:

  • Oil leakage
  • Dust intrusion
  • Water contamination

OEM-Style Direct Replacement

Manufactured with:

  • Accurate roller dimensions
  • Correct shaft size
  • Standard mounting structure

Provides direct bolt-on replacement without modification.


Technical Specifications

Item Specification / Detail
Product Type Excavator Undercarriage Track Roller
Machine Model Hyundai R80 Excavator
Applicable Machine Weight Approx. 8 Ton Class
Roller Structure Heavy-duty Steel Body with Precision Machining
Material Grade 40Mn2 Alloy Steel
Manufacturing Process Forging / Casting + CNC Machining
Heat Treatment Induction Hardening
Surface Hardness HRC 52-58
Hardening Depth 5mm-10mm
Seal System Heavy-duty Floating Oil Seal
Lubrication System Lifetime Internal Lubrication
Bearing Structure Hardened Shaft + Wear-resistant Bushing
Quality Inspection Dimension, Hardness and Sealing Inspection
Flange Type Single Flange (SF) / Double Flange (DF)
Installation OEM Standard, Bolt-on Direct Replacement
Shipping Note Heavy Component — Sea Freight Recommended

RFQ