The main pump is the heart of the hydraulic system: it converts engine power into the flow and pressure that run the boom, the swing and both travel motors. When it starts to fail, everything on the machine slows down at once. Hydraulic America is a direct-import hydraulic pump supplier for the United States and Canada, carrying new main pumps for sixteen equipment brands, with same-day dispatch on stock items and a warranty of up to two years, depending on the item.
Excavator hydraulic pump failure rarely announces itself with a bang. It shows up as behaviour that operators explain away for weeks:
Our catalogue of hydraulic pumps for excavators follows the machine, not the pump casting. The deepest ranges are Komatsu hydraulic pumps, Hitachi hydraulic pumps with more than 250 part numbers, Kubota hydraulic pumps, New Holland hydraulic pumps, Doosan hydraulic pumps, Case hydraulic pumps and Caterpillar hydraulic pumps. Bobcat, JCB, John Deere, Hyundai, Kobelco, IHI, Takeuchi, Volvo and Yanmar each have their own section further down this page.
The range covers Kawasaki-pattern K3V and K5V variable displacement pumps as well as the smaller gear and tandem pumps used on mini excavators. If you are working on an E-Series machine, our New Holland main pump buyer's guide walks through the K3V variants in detail.
Three things decide which pump fits, and model year is only one of them. First, the pump part number stamped on the housing or on the regulator cover. Second, the machine serial number, because mid-production changes to the regulator and the pilot circuit are common. Third, the spline count and shaft diameter on the input shaft, which differ between otherwise identical castings.
Send a photo of the data plate and we will match it against the manufacturer parts books. That check takes a few minutes and it is free. Guessing costs a week of downtime and a return shipment, which is why our parts specialists would rather look at the photo first. If you are choosing between specifications rather than identifying an existing unit, start with how to choose a hydraulic pump for your excavator.
A used excavator pump pulled from a scrapped machine has an unknown number of hours on the swash plate and the valve plate, and no coverage when it fails. Cheap aftermarket hydraulic pumps tend to save money on the rotating group, which is precisely the part that decides how long the unit lasts. Everything we sell is new, produced by our South Korean parent manufacturer, which has supplied hydraulic components to Hyundai, Doosan and Volvo for over forty years.
UPS delivery across the contiguous United States and Canada. Same-day shipping on most in-stock pumps from our Ontario and New York warehouses. Ask for an RGA number inside 30 days and the pump can come back, unused and in its packaging. Each listing states its own cover, which runs to two years at most, under our warranty policy.
Fleet operators and repair shops ordering several heavy equipment pumps at once can send the model list through the quote request form, and we answer the same business day. If the travel circuit rather than the main pump is the weak point, go to our final drive motors catalogue instead.
