Excavator Main Pumps

Excavator Main Pumps – Hitachi, John Deere and Caterpillar

V.I. Equipment is a name you can depend on for excavator main pumps. We sell quality excavator parts at low prices. V.I. Equipment can supply used excavator hydraulic pumps and rebuilt excavator hydraulic pumps for Hitachi, John Deere and Caterpillar excavators. If you’re in need of a rebuilt or used Hitachi excavator main pump, Deere excavator main pump or Cat excavator main pump, please contact us today. Our excavator parts inventory includes all major components for most models of Hitachi excavators, John Deere excavators and Caterpillar excavators, at the most competitive prices. We also have pump test stands to ensure all our main pumps are working to your satisfaction (see photo).

Pump Test Stand

Before we ship our excavator main pumps, we test many different components with these test stands at no additional cost to you. This way you can be certain you’re receiving quality products with no issues.

Browse our main pumps for Caterpillar, Hitachi, and John Deere excavators below and get it touch with us for a quote or if you have questions.

We Ship Excavator Main Pumps to the USA, Canada, and Worldwide

No matter where your project takes you, VI Equipment can keep you moving. We offer global shipping on all our excavator main pumps, ensuring you get the parts you need quickly and efficiently.

Why Shop VI Equipment for Your Excavator Main Pumps

There are many reasons to choose VI Equipment for your excavator main pumps. We offer exceptional value, unmatched selection, and reliable performance to keep your projects on track. Discover the VI Equipment difference and experience the benefits firsthand.

Understanding the Role of Excavator Main Pumps

Excavator main pumps are pivotal components in the hydraulic system, converting mechanical energy from the engine into hydraulic energy that powers various machine functions. These pumps ensure that hydraulic fluid is delivered at the necessary pressure and flow rate to operate the boom, arm, bucket, and other attachments efficiently. A well-functioning main pump is essential for the excavator’s performance, affecting its digging power, speed, and overall productivity.​

Recognizing Signs of Main Pump Wear or Failure

Timely identification of main pump issues can prevent costly downtime. Common indicators include:

• Reduced Hydraulic Performance: Slower movement of the boom or arm may signal decreased pump efficiency.​ 
• Unusual Noises: Grinding or whining sounds can indicate internal wear or cavitation.​ 
• Overheating: Excessive heat generation may result from internal leakage or component failure.​ 
• Hydraulic Fluid Leaks: Visible leaks around the pump area suggest seal degradation or cracks.​ 

Addressing these symptoms promptly can extend the pump’s lifespan and maintain excavator performance.​

Maintenance Tips for Prolonging Main Pump Life

Regular maintenance is crucial for the longevity of excavator main pumps:Hydraulic Fluid Checks: Ensure fluid levels are adequate and replace fluids as per manufacturer recommendations.​

• Filter Replacements: Change hydraulic filters regularly to prevent contamination.​ 
• System Inspections: Periodically inspect hoses and connections for signs of wear or leaks.​ 
• Warm-Up Procedures: Allow the hydraulic system to reach optimal operating temperature before heavy use, especially in cold climates

Implementing these practices can enhance pump efficiency and reduce the risk of unexpected failures.​

Choosing Between Rebuilt and Used Main Pumps

When selecting a replacement main pump, consider the following:​

• Rebuilt Pumps: These have been disassembled, inspected, and had worn parts replaced, offering performance close to new units at a reduced cost.​ 
• Used Pumps: Typically removed from decommissioned machines, these are cost-effective but may have varying degrees of wear.​ 

Your choice depends on budget constraints, urgency, and the specific requirements of your excavator model.

FAQ – Frequently Asked Questions

1. What is an excavator main pump?
   The main pump in an excavator converts mechanical energy from the engine into hydraulic flow and pressure, powering functions such as boom/arm/attachment movement, tracks, swing systems, etc.
   
2. How do I know when the main pump needs replacement?
   Key warning signs include sluggish hydraulic response (boom/arm slower than usual), unusual whining or grinding noises, overheating of hydraulic fluid, visible leaks around pump housing, or metal debris in the hydraulic system.
   
3. What should I check when selecting a replacement excavator main pump?
   Important factors include matching the make/model/serial number of your machine, verifying the pump model/part number, confirming displacement/flow/pressure ratings, shaft and mounting configuration, and whether the unit is used, remanufactured or new. 
4. Are used or remanufactured main pumps a reliable choice?
   Yes—they can provide significant cost savings while still delivering reliable performance if they’re sourced from a reputable supplier, properly tested (for example on a pump test-stand), and come with a warranty or guarantee.
   
5. What maintenance should be carried out after installing a new main pump?
   After installation: flush or replace dirty hydraulic fluid and filters, check system for air/cavitation, monitor operating temperatures and pressures, inspect for leaks or unusual vibration, and keep maintenance logs of hours and performance. Regular preventive maintenance will prolong pump life.

How quickly can a main pump replacement reduce downtime?
Because the main pump is critical to machine hydraulics, replacing it with a correctly matched unit (used, rebuilt or new) can significantly reduce downtime compared to waiting for a full OEM new part, especially if the supplier stocks units and tests them in advance.