D8R BOTTOM ROLLER SF PART NO.:7T-1258
Product Overview
Part Number: 7T-1258
Fit Machine: CAT D8R Heavy Crawler Bulldozer
This track roller (bottom roller) is a heavy-duty aftermarket replacement undercarriage wear part designed for CAT D8R mining bulldozers. Forged from high-strength alloy steel and processed with full-surface deep carburizing quenching heat treatment, it is fitted with a triple-layer anti-mud leak-proof oil seal system. The roller bears the full weight of the heavy bulldozer and ensures steady track chain operation in open-pit mines, stone quarries and heavy earthmoving construction sites.
Core Advantages
Precision Machined Replacement Installation Dimensions
Roller width, spindle length and mounting hole sizes are precisely machined to fit CAT D8R bulldozers seamlessly. Direct bolt-on installation is available without cutting, welding or any modification.
Ultra Deep Hardened Roller Surface
Deep carburizing heat treatment delivers ultra-high surface hardness and outstanding wear resistance, extending service life significantly under rocky, muddy mining working conditions.
Triple Multi-Layer Mud-Proof Oil Seal
High temperature and sediment resistant composite rubber seals block water and mud ingress as well as grease leakage, greatly lengthening maintenance intervals for heavy-duty dozers.
Oversized Reinforced Internal Bearing
Boasts excellent load-bearing capacity and smooth stable rotation, effectively preventing track shaking, jumping and chain derailment under full heavy working loads.
Strict Factory Full Inspection
Each bottom roller undergoes hardness testing, hydraulic leak testing and dimensional calibration before packaging to guarantee consistent stable quality.
Compatible Equipment
This aftermarket replacement roller fits CAT D8R heavy crawler bulldozer perfectly.
If you cannot confirm compatibility, send your machine model and photos of your old track roller to our sales team for fast professional matching.
Application
Load-bearing replacement bottom track roller for CAT D8R mining bulldozers, widely used in open-pit quarries, large mine sites and heavy earthmoving machinery chassis load-bearing systems.
Packing & Delivery
Adopt shockproof export wooden cases and fumigated wooden pallets for outer packaging.
We support bulk wholesale orders, mixed full-set bulldozer undercarriage spare parts, fast mass production lead time and global door-to-door logistics service.
Why Choose MUYE Aftermarket Undercarriage Parts
MUYE Machinery has specialized in aftermarket heavy mining bulldozer & excavator chassis spare parts for over 10 years:
- Complete product lineup including track roller, top roller, idler, sprocket, segment and track shoe compatible with CAT, Komatsu, Doosan, Hitachi, Volvo and more brands
- Direct factory supply with competitive wholesale prices, no extra markup from middlemen
- All aftermarket undercarriage wear parts come with a 12-month quality warranty
- Professional technical team provides accurate model matching and installation guidance
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