23 Jul 3pcs Track Roller Bottom Roller Fits Caterpillar CAT 301 Excavator Undercarriage
For Caterpillar CAT 301. △ Top Roller. 3 x Bottom Roller. Yield strength σ0.2 (MPa):≥310. △ Sprocket. Roller, 45# carbon steel or 40Cr, quenched HRC25-30, surface quenched HRC52-58, hardened to a depth of 2-3mm....