Caterpillar Inc. is the world's largest manufacturer of heavy construction and mining equipment. The CAT lineup includes hydraulic excavators, wheel loaders, crawler dozers, motor graders, articulated trucks, and mining-scale equipment. CAT machines are the operational backbone of construction, quarrying, mining, forestry, and road-building operations worldwide.
Equipment types
Parts sourcing guidance applies across Caterpillar's active product lineup. These are the models we see most often in customer fleets.
320
Hydraulic excavator
336
Hydraulic excavator
312
Hydraulic excavator
349
Hydraulic excavator
950
Wheel loader
966
Wheel loader
D6
Crawler dozer
D8
Crawler dozer
140
Motor grader
730
Articulated truck
259D3
Compact track loader
What operations teams typically source for Caterpillar equipment. PartsIQ covers every category across your supplier network.
Engine oil, fuel, hydraulic, cab, air
Main pumps, cylinders, swing motors, hoses
Tracks, shoes, rollers, idlers, sprockets
Bucket teeth, cutting edges, tips, adapters
Injectors, turbos, belts, gaskets
Transmissions, final drives, torque converters
ECMs, sensors, wiring, starters
Radiators, oil coolers, fans
Engines, pumps, turbos — OEM-quality at reduced cost
For authoritative OEM part numbers and exploded-view diagrams, refer to Caterpillar's official parts catalog. PartsIQ sources parts across your supplier network — we don't replace the OEM catalog, we help you source against it.
Honest guidance. Both channels have a place — the question is which fits which part.
CAT C-series engine internals, electronic control modules, Tier 4 emissions systems, hydraulic main pumps, swing motors, and warranty-period machines. Cat Reman is an OEM-quality alternative at lower cost for many rebuilt components.
Filters, Ground Engaging Tools (teeth, cutting edges, tips), undercarriage pads and links, hoses, belts, and general wear parts. The CAT aftermarket ecosystem is mature with many validated suppliers.
Patterns we see across teams running Caterpillar equipment.
PartsIQ is a parts procurement platform — not a Caterpillar dealer. We source across your verified supplier network and use AI to collect quotes faster.
Calls Caterpillar dealers and aftermarket suppliers in parallel to collect quotes.
Find parts by description, part number, or equipment model across multiple databases.
Side-by-side quotes from multiple suppliers with pricing, lead time, and availability.
The Caterpillar parts catalog is available at parts.cat.com and through authorized CAT dealers. You can search by model, serial number, or part number for current OEM parts and exploded-view diagrams. PartsIQ is not affiliated with Caterpillar Inc. — we help source parts across CAT dealers, the CAT Reman program, and verified aftermarket suppliers.
CAT Reman is Caterpillar's factory-remanufactured parts program — rebuilt OEM components (engines, pumps, turbos) that meet OEM specifications at a lower price point than new OEM parts. Reman parts carry a 'CR' or 'CU' prefix on the part number. For many rebuild scenarios, CAT Reman offers the best balance of reliability and cost. It's considered OEM for warranty purposes on most machines.
Quality varies significantly by category. Filters, Ground Engaging Tools, and undercarriage wear parts have mature aftermarket ecosystems with many validated suppliers. Electronic control modules, Tier 4 emissions components, and hydraulic main pumps are higher risk outside OEM or CAT Reman. For CAT specifically, 'aftermarket' covers a wide quality spectrum — verify supplier reputation before ordering critical components.
PartsIQ aggregates sourcing across OEM dealers, the CAT Reman program, and aftermarket suppliers in one workflow. Our AI voice agent can call multiple CAT dealers in parallel to collect quotes and compare pricing side-by-side with Reman and aftermarket alternatives. For teams running CAT-heavy fleets, that shortens sourcing cycles on the most common parts (undercarriage, GET, filters) where price variation across sources is significant.
PartsIQ offers a complete suite of tools for parts inventory management, procurement, and supplier communication.
All-in-one platform with AI search, voice agent, and order tracking.
Learn moreReal-time tracking with automated reorder alerts and AI forecasting.
Learn moreSemantic search across 3 databases with 95% match accuracy.
Learn moreVoice agent automation, email quoting, and price comparison.
Learn moreSee how PartsIQ's AI voice agent calls your Caterpillar suppliers, compares quotes side-by-side, and cuts sourcing time from hours to minutes. 15-minute walkthrough.
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Disclaimer: PartsIQ is not affiliated with, sponsored by, or endorsed by Caterpillar Inc.. All trademarks, logos, brand names, model designations, and part numbers referenced on this page are the property of their respective owners and are used here solely to describe equipment compatibility and procurement workflows under nominative fair use. PartsIQ is an independent parts procurement platform and does not sell OEM parts directly.