{"product_id":"cat-320b-excavator-main-pump-1232233-123-2233","title":"CAT 1232233 (123-2233) Main Pump | Fits 320B Excavator","description":"\u003ch2\u003eCAT 1232233 (123-2233) Main Pump | Fits 320B Excavator\u003c\/h2\u003e\n\u003cp\u003ePremium hydraulic main pump designed as a direct OEM-compatible replacement for Caterpillar 320B excavator. Built to deliver consistent hydraulic performance and long service life in demanding construction, quarry, and heavy excavation applications.\u003c\/p\u003e\n\u003ch3\u003eProduct Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1232233 \/ 123-2233\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Fit:\u003c\/strong\u003e No modifications required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Performance:\u003c\/strong\u003e Meets or exceeds original Caterpillar specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Precision-engineered for long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Application:\u003c\/strong\u003e Suitable for construction, quarry, and heavy excavation projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1232233 \/ 123-2233\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Hydraulic Main Pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand Compatibility:\u003c\/strong\u003e Caterpillar (CAT)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydraulic System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12 Months\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible Models\u003c\/h3\u003e\n\u003cp\u003eThis main pump fits the following Caterpillar excavator:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCaterpillar 320B Excavator\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eExcavator Boom and Arm Hydraulic Circuits\u003c\/li\u003e\n\u003cli\u003eExcavator Bucket and Slewing Functions\u003c\/li\u003e\n\u003cli\u003eHeavy-Duty Digging and Trenching Operations\u003c\/li\u003e\n\u003cli\u003eConstruction, Quarry, and Heavy Excavation Projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose This Pump?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eQuality Guaranteed - Manufactured to meet OEM standards\u003c\/li\u003e\n\u003cli\u003eReady to Ship - In stock and available for immediate dispatch\u003c\/li\u003e\n\u003cli\u003eExpert Support - Technical assistance available\u003c\/li\u003e\n\u003cli\u003eCompetitive Pricing - Cost-effective alternative to dealer parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What are the symptoms of a failing hydraulic main pump on a CAT 320B excavator?\u003c\/strong\u003e\u003cbr\u003eA: Common signs include slow or weak boom\/arm\/bucket movement, the excavator struggling to dig under load, hydraulic oil overheating, whining or knocking noise from the pump area, and visible external hydraulic oil leakage. If your 320B is operating at reduced power, the main pump is likely worn and should be replaced.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What pressure and flow does the CAT 1232233 main pump deliver?\u003c\/strong\u003e\u003cbr\u003eA: The 1232233 is an axial piston variable displacement main pump designed for the CAT 320B excavator's hydraulic system. It delivers the pressure and flow rates specified by Caterpillar for the 320B. For exact specifications, contact our technical team with your excavator's serial number.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this 1232233 pump include the mounting flange and coupling?\u003c\/strong\u003e\u003cbr\u003eA: The pump is supplied as a complete unit. Depending on your 320B's configuration, additional mounting hardware or couplings may be required. Contact us with your excavator serial number and we will confirm exactly what is included and what additional parts you may need.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this main pump myself, or do I need a technician?\u003c\/strong\u003e\u003cbr\u003eA: Installation requires hydraulic system knowledge, proper tools, and flushing the hydraulic system to remove contaminants. We recommend professional installation by a qualified technician or CAT dealer service center to ensure correct installation and avoid hydraulic system damage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this is the correct pump for my CAT 320B?\u003c\/strong\u003e\u003cbr\u003eA: Check the part number on your current pump — if it reads 1232233 or 123-2233, this is the correct replacement. If your pump is unreadable or you are unsure, contact us with your excavator's serial number and we will verify compatibility before you order.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What hydraulic oil is recommended when replacing the main pump?\u003c\/strong\u003e\u003cbr\u003eA: Caterpillar recommends using Cat HYDO Advanced 10 or 30 weight hydraulic oil for the 320B, depending on operating temperature. When replacing the main pump, we strongly recommend flushing the entire hydraulic system to remove metal particles and contaminants that caused the original pump failure, then refilling with fresh hydraulic oil.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this pump compatible with a CAT 320B that has auxiliary hydraulic circuits?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the 1232233 main pump is compatible with CAT 320B excavators equipped with auxiliary hydraulic circuits for attachments such as breakers, thumbs, or grapples. The pump supplies flow to all hydraulic functions. Contact us with your specific serial number if you have modified auxiliary circuits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the warranty on this main pump?\u003c\/strong\u003e\u003cbr\u003eA: This pump comes with a 12-month warranty covering manufacturing defects. The warranty does not cover damage caused by contaminated hydraulic oil, improper installation, or failure to flush the hydraulic system during installation.\u003c\/p\u003e\n\u003cp\u003eLooking for this hydraulic pump? Contact us today for pricing, availability, and lead time information.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003eRequest a Quote\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cp\u003eExplore our full range of \u003ca href=\"\/collections\/construction-machinery-caterpillar\"\u003eCaterpillar piston pumps\u003c\/a\u003e.\u003c\/p\u003e","brand":"HEPUMP","offers":[{"title":"Default Title","offer_id":46754173943964,"sku":null,"price":0.0,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/7385\/0524\/files\/123-22331.jpg?v=1777210748","url":"https:\/\/hepumpstore.com\/products\/cat-320b-excavator-main-pump-1232233-123-2233","provider":"HEPUMP","version":"1.0","type":"link"}