Caterpillar D6D D6D SR D6E Bulldozer Track Roller Bottom Roller Lower Roller 7G0423 1181618 1205766 1181620 1181614Double Flange Undercarriage Roller Group Heavy Duty Replacement

Product Overview
The Track Roller — also called Bottom Roller or Lower Roller — is the load-bearing roller mounted under the track frame of the D6D bulldozer. It supports the full machine weight, keeps the track chain aligned, and transfers the load evenly to the ground. A worn or seized track roller causes track misalignment, accelerated wear on the chain and sprocket, and expensive downtime. Our rollers are engineered specifically for the Caterpillar D6D undercarriage family, covering D6D, D6D SR and cross-compatible D6E models for a direct, bolt-on replacement.

Key Features & Benefits

• Broad Compatibility: Fits Caterpillar D6D and D6D SR bulldozers, cross-compatible with D6E series. Replaces OEM part numbers 7G-0423, 118-1618, 120-5766, 118-1620, 118-1614 and cross references CR6089 / CR1793.
• Single & Double Flange Options: Both Single Flange (SF) and Double Flange (DF) versions available to match the exact position on the track frame.
• Heavy-Duty Material: Made from high-strength forged alloy steel (35SiMn / 40Mn2), providing excellent structural integrity and fatigue resistance under constant heavy loading.
• Advanced Induction Hardening: The tread surface is hardened to HRC 50-56 with a hardening depth of 5-10mm, significantly reducing wear from abrasive rocks, sand and dirt.
• Reliable Sealing Technology: Equipped with professional-grade bi-metal bushings and heavy-duty floating seals to prevent grease leakage and keep mud and water out of the bearing area.
• Lifetime Lubrication: Factory-filled and sealed, maintenance-free for the normal service life of the roller.
• True OEM-Style Fit: Manufactured to original specifications, easy to install without modifying the track frame.

Technical Specifications

Why Trust Our Undercarriage Solutions?
For a heavy bulldozer like the D6D, every track roller carries a significant share of the machine's total weight — a failed roller means track misalignment, extra wear on the entire undercarriage and expensive downtime. Every roller we produce is 100% inspected for hardness, dimensional accuracy and sealing quality before shipment. Our goal is to deliver genuine-compatible durability at a more competitive price, backed by a clear warranty. Contact us with your machine serial number, current part number and position (DF) to confirm the correct fitment.