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GLOBALMACHEX
Caterpillar CAT E312 312 312B Excavator Track Roller Bottom Roller Lower Roller Undercarriage Track Roller Assembly 4I7346 Replacement

Caterpillar CAT E312 312 312B Excavator Track Roller Bottom Roller Lower Roller Undercarriage Track Roller Assembly 4I7346 Replacement

Model: E312TR

USD $100.00 - $220.00 / Pieces

Min. Order: 1 Pieces

Model:
E312
Description:
Track Roller
Replacement:
E312 B
Part No.:
4I7346
Supported Trade Terms:
FOBEXW
Lead Time:
in stock
Supply Ability:
10,000 Pieces
Shipping Port:
Xiamen, China
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Product Features & Applications

Heavy-duty Track Roller (Bottom Roller / Lower Roller) for Caterpillar CAT E312, 312 and 312B excavators. Manufactured from high-strength alloy steel with precision machining, advanced heat treatment and heavy-duty floating seal technology. The roller supports the full operating weight of the 12-ton class excavator, guides the track chain and maintains stable undercarriage alignment during excavation, construction and earthmoving operations. Compatible with CAT E312 series excavators. Reference OEM numbers include 4I7346, 861934, 151-9747, CR5108 and 417346. Available in Single Flange (SF) and Double Flange (DF) versions according to track frame position. Manufactured according to OEM-style dimensions for direct replacement with excellent wear resistance, reliable sealing performance and long service life. Please provide your machine serial number or existing OEM part number to confirm exact fitment.

Product Overview

The Track Roller — also known as Bottom Roller or Lower Roller — is a critical undercarriage component installed beneath the track frame of Caterpillar CAT E312 crawler excavators.

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

For a 12-ton class excavator, the track roller operates under demanding conditions:

  • Continuous machine loading
  • Impact from uneven terrain
  • 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 sprocket and idler wear

Our CAT E312 track rollers are manufactured according to OEM-style drawings, providing reliable aftermarket replacement solutions for construction contractors, equipment dealers and repair workshops.

Key Features & Benefits

Wide Compatibility

Designed for:

  • CAT E312
  • CAT 312
  • CAT 312B
  • CAT 312BL
  • CAT E120B
  • CAT E311
  • CAT E313
  • CAT E314

Reference OEM numbers:

  • 4I7346
  • 861934
  • 151-9747
  • CR5108
  • 417346

Single & Double Flange Options

Available configurations:

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

Suitable for different positions on the track frame.

Heavy-Duty Alloy Steel Construction

Manufactured from:

40Mn2 Alloy Steel

Advantages:

  • High load-bearing capacity
  • 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:

  • Rock abrasion
  • Hard soil wear
  • Continuous working loads

Reliable Floating Seal System

Equipped with:

  • Heavy-duty floating oil seals
  • Premium bushings
  • Lifetime lubrication system

Designed to prevent:

  • Oil leakage
  • Dust intrusion
  • Mud and water contamination

OEM-Style Direct Replacement

Manufactured with:

  • Accurate roller diameter
  • Correct shaft dimensions
  • Standard mounting specifications

Provides direct bolt-on replacement without modification.

Technical Specifications

Item Specification / Detail
Machine Model Caterpillar CAT E312 Excavator
Compatible Models E312 / 312 / 312B / 312BL / E120B
Machine Class 12 Ton Excavator
Part Type Track Roller (Bottom Roller / Lower Roller)
OEM Part Number 4I7346 / 861934 / 151-9747 / CR5108
Flange Type Single Flange (SF) / Double Flange (DF)
Material High-strength 40Mn2 Alloy Steel
Manufacturing Method Forging / Casting / Machining
Surface Hardness HRC 52-58
Hardening Depth 5mm - 10mm
Sealing Heavy-duty floating oil seal, lifetime lubricated
Mounting OEM standard, bolt-on direct replacement
Application Construction, earthmoving and excavation operations
Shipping Note Heavy component — sea freight recommended

Why Trust Our Undercarriage Solutions?

For a 12-ton class excavator like CAT E312, undercarriage components directly affect machine stability, travelling performance and operating cost.

A reliable track roller helps:

  • Maintain proper track alignment
  • Reduce crawler vibration
  • Extend track chain service life
  • Protect sprocket and idler components
  • Reduce unexpected downtime

Every roller produced by our factory undergoes strict quality inspection:

  • Raw material inspection
  • Heat treatment verification
  • Dimensional accuracy checking
  • Seal performance testing

With professional manufacturing capability for excavator undercarriage parts, we provide OEM-compatible replacement solutions with stable quality, competitive pricing and warranty support.

Contact us with your machine model, serial number, OEM part number and roller position to confirm the correct replacement.

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