Hydraulic main pump

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About Hydraulic main pump

Replacement Hydraulic Main Pumps for Heavy Equipment

Explore hydraulic main pumps at Fab Heavy Parts for selected excavators, wheel loaders, and other heavy equipment applications. This collection includes replacement main hydraulic pump assemblies for different machine models and pump configurations, along with selected repair components.

A hydraulic main pump supplies pressurized hydraulic fluid to the machine's hydraulic circuits. Pump designs and control arrangements vary between equipment models, making it important to identify the correct assembly before replacing a worn or damaged unit.

Hydraulic Main Pump Assemblies and Repair Options

Our collection features complete hydraulic main pump assemblies listed under different manufacturer references and pump model series. Examples include Nachi PVD-series pumps, K3V-series pump configurations, and other application-specific replacement units.

The catalog also includes a hydraulic main pump repair kit for a listed Caterpillar application. A repair kit is not the same as a complete pump assembly, so check each product listing to confirm the components included.

For customers seeking individual sealing components rather than a complete pump, our main pump seal kits collection provides additional options.

Excavator and Loader Applications

Available listings cover selected Caterpillar, Komatsu, Hitachi, Kobelco, Hyundai, Doosan, and Daewoo equipment.

Examples include hydraulic main pump 163-9762 for the listed Caterpillar 303.5 excavator, reference 708-1S-11212 for selected Komatsu PC-series excavators, and AP2D25DP / K1027212A for Daewoo DH55 and Doosan DX55 applications.

Other listings include pump 708-2L-00400 for selected Komatsu PC200-8, PC250-8, and PC260-8 excavators, as well as hydraulic main pump 705-57-21000 for Komatsu WA250-3MC and WA250PT-3MC loaders.

These examples represent individual catalog applications. Pumps listed for similar machines may still have different control or connection configurations.

Selecting the Correct Replacement Main Pump

Start by checking the original hydraulic pump part number and identification plate. Compare the pump model, equipment make, machine model, and serial number with the replacement listing.

Where applicable, verify the pump's mounting arrangement, drive connection, hydraulic ports, displacement, and control configuration. A matching machine model alone may not establish compatibility.

For a broader selection of related components, browse our hydraulic pump collection.

If the original pump reference is unclear, gather photographs of the pump identification plate, hydraulic connections, and mounting arrangement before selecting a replacement.

Need Help Finding the Right Hydraulic main pump?

Can't find the replacement part you need? Send FAB Heavy Parts your part number, engine model, or equipment details. Our team can help review your requirements and provide a quotation.

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Frequently Asked Questions

How do I find the right hydraulic main pump for my excavator?

Start by checking the part number and pump model on your existing hydraulic main pump. Compare them with our replacement hydraulic main pump listings and confirm your excavator make, model, and serial number. Where applicable, also check the mounting arrangement, drive connection, hydraulic ports, and pump control configuration. Similar excavators may use different pump assemblies, so we recommend verifying more than the machine model before ordering.

Does every hydraulic main pump listing include a complete pump assembly?

No. Our collection primarily includes replacement hydraulic main pump assemblies, but it also contains selected repair components. Check the product title, description, and photographs to confirm what is supplied. If you need seals or other individual repair components rather than a complete pump, make sure the product matches your original pump model and repair requirements.

Can you help me identify a replacement main pump if the part number is unreadable?

You can provide your equipment make, model, and serial number, along with photographs of the original pump. Pictures of the identification plate, mounting points, drive connection, and hydraulic ports are especially useful. We can use this information to review potential replacement hydraulic main pump listings, although additional technical documentation or measurements may be required to confirm compatibility.

What should I check before installing my replacement hydraulic main pump?

Before installation, compare the received pump with your original assembly and verify the part number, mounting features, drive connection, hydraulic ports, and relevant control components. Inspect the pump for visible damage and confirm that the supplied parts match the part listing. Follow the equipment manufacturer's service procedures for hydraulic cleanliness, installation, and any required setup or testing.

Will replacing the main hydraulic pump fix slow or weak excavator hydraulics?

A worn or damaged main pump can contribute to poor hydraulic performance, but similar symptoms may result from control valves, hydraulic supply problems, system restrictions, or other components. Replacing the pump may not solve the issue if another fault remains. We recommend diagnosing the hydraulic system according to the equipment manufacturer's service information before deciding which component needs replacement.

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