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Mini Excavator
Cat 303.5
Shop rubber tracks, undercarriage parts, and attachments for your Cat 303.5 — all in one place.
Parts for Cat 303.51 track option3 undercarriage parts
Operating Weight
7,700 lb
Primary Track
300x52.5Wx84
Guaranteed FitHeavy Duty Comes Standard.24-Month WarrantyNationwide Fulfillment
Rubber Tracks
300x52.5Wx84
Choose your tread
Bridgestone Premium
1 tread
Machine FAQ
Cat 303.5 parts & ordering questions.
What products can I shop for my CAT 303.5?
Machine-based rubber tracks, undercarriage parts, buckets, grapples, forks, and brush cutters for the CAT 303.5.
Do these parts fit the CAT 303.5?
This page is built around CAT 303.5 fitment from the model record, supplier part data, and machine-class attachment compatibility. Verify by serial number for serial-specific parts.
How fast does shipping take?
Same-day shipping on orders before 12pm CT. Most orders deliver in 1–3 business days. Tracking emailed at pickup.
What is the warranty?
All Heavy Iron Supply Co. rubber tracks carry a 24-month manufacturer warranty against defects — not prorated.
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