CAT304/CAT305-158-4765 Bottom Roller for Caterpillar

1. Guaranteed Fit Models: Caterpillar mini excavators: 304, 304.5, 305.5, 304CR, 305CR, 306. Mitsubishi mini excavator: MM45. No serial number restrictions. Verified through actual installation, precise fit without any modifications needed.

2. Part & Spec Info: Main part no.:158-4765; Backup nos.:158-4765, 340-8957, 333-5606; Core features: Aftermarket track roller with guaranteed fit. Installation quantity varies by model. No mounting bolts included. Full undercarriage parts for compatible models available.

3. Model Confirmation Tip: Confirm exact equipment model before purchase (no serial check needed). Note that 10mm installation bolts are not included—prepare them separately. No alternate part listings exist, ensuring exclusive fit for the listed models.

1. Installation Guidance: Direct aftermarket replacement. Installation position: Center-bottom of the undercarriage, bearing machine weight. Quantity per machine: 304CR (8 pcs), 305CR/304.5 (10 pcs). 10mm mounting bolts not included—prepare separately.

2. Maintenance Recommendation: Regularly inspect the bottom roller for wear or damage. It prevents sagging into the track frame during operation, so timely replacement reduces abnormal track wear. Check idler, sprocket and carrier roller together for overall undercarriage maintenance.

1. Quality & Craftsmanship: Professional aftermarket replacement made of high-quality steel. Strictly conforms to Caterpillar OEM specs, ensuring precise fit and reliable durability. No known fit issues for the listed models.

2. Related Supplies: One-stop procurement for Caterpillar 304/305 series & Mitsubishi MM45 undercarriage parts: Bottom Roller (158-4765), Top Roller, Idler, Sprocket. Fully meets complete undercarriage repair and maintenance needs.