Hydraulic Pump and Motor Repair in Ames, Iowa
When a pump starts whining, a motor won’t spin under load, or a lift just sits there groaning instead of lifting, that’s a hydraulic pump and motor repair job walking through our door. We’re at 210 Freel Dr in Ames, and most weeks we’ve got at least one gear pump or piston motor torn down on the bench, checking wear plates, shafts, and seals to figure out whether it’s rebuildable or whether it’s time for a straight swap.
How we handle hydraulic pump and motor repair
Every hydraulic pump and motor repair starts the same way: we pull the unit, clean it up, and put it on the bench where we can actually see what’s going on inside. We’ve replaced pumps on flat bed trucks where the labor alone ran into the job because of how the pump was tucked up behind the frame rail. We’ve also done full lift rebuilds where the pump, valves, and hoses all needed to come out together, then delivered the rebuilt unit back to the customer’s site within a hundred miles of our shop, no trailer needed for most of those runs.
For gear pumps specifically, we’re often swapping in a new 15 GPM reel-style unit along with the fittings that mate it to the existing hose runs, because matching thread and O-ring sizes wrong is one of the fastest ways to end up back at square one with a leak. On the motor side, we see a lot of PTO-driven setups where the hub, output shaft, and stub shaft all need attention at the same time as the pump itself, since a worn coupling will chew up a brand new pump just as fast as an old one.
If the issue looks more like a pressure problem than a straight pump failure, we walk through our hydraulic pump not building pressure checks before we ever quote a rebuild, because sometimes it’s a relief valve stuck open, not a worn pump. And if you’re running a Blackmer unit specifically, our Blackmer pump troubleshooting page covers the failure patterns we see most on those models.
What we check during hydraulic pump and motor repair
- Shaft seal condition and case drain flow, since a bad seal shows up as oil around the mounting flange long before the pump quits outright
- Gear or vane wear against the housing, which tells us whether a rebuild kit will actually hold or if the housing itself is scored
- Coupling and PTO hub alignment, because misalignment stresses both the pump shaft and the motor at the same time
- Relief valve setting, often adjustable up to 7000 PSI on the units we service, to confirm the system isn’t just starved for pressure
- Inlet and outlet fitting sizes, matching hose barb and JIC ends so we’re not forcing a fitting that doesn’t belong
Common signs you need hydraulic pump and motor repair
Most calls we get start with one of a handful of symptoms. A pump that’s suddenly loud — that high-pitched whine — usually means cavitation or worn gears letting oil slip past instead of building pressure. A motor that turns slow or stalls under load points to internal leakage or a coupling that’s chewed itself loose. Oil showing up on the shop floor under the pump housing almost always traces back to a shaft seal, and that’s a cheaper fix than most people expect if we catch it early.
On flat bed trucks and lift equipment, we also see plenty of jobs where the pump itself is fine but the motor driving it has given out, especially on units running long PTO shafts out to a rear-mounted pump. That’s why any real hydraulic pump and motor repair has to look at both halves of the system together — swapping just the pump when the motor’s coupling is worn out is a good way to be back on the bench in a month.
If your equipment falls into the material handling category — forklifts, scissor lifts, dock levelers — we’ve got a dedicated page on material handling hydraulic repair in Iowa that covers the specific pump and cylinder issues that show up on that gear.
How much does hydraulic pump and motor repair cost
Costs vary a lot depending on whether we’re rebuilding or replacing, and whether the motor needs work too. A medium-duty pump rebuild, where we’re replacing internal wear parts but reusing the housing, typically runs $400 to $900 in parts and labor combined. A full gear pump replacement, including a new 15 GPM unit and matching fittings, generally lands between $700 and $1,400 depending on access — truck-mounted pumps tucked behind a frame rail take more labor time than a pump sitting out in the open on a lift.
For a full lift hydraulic pump and motor repair that includes a new pump, valve work, and delivery within a hundred miles of our shop, jobs commonly run $1,500 to $3,000 once you factor in the pump, valves, hose, and a five-gallon bucket of hydraulic fluid to refill the system. PTO-driven motor jobs — where we’re replacing the hub, output shaft, and stub shaft along with the pump — tend to run higher, often $1,800 to $3,500, because there’s more disassembly involved getting to the drivetrain side of things.
If the pump turns out fine but the cylinders on the same machine are leaking or scored, that’s a separate job — check our hydraulic cylinder rebuild cost guide for what that side of the repair usually runs, and if you’re out near Winterset our hydraulic cylinder repair Winterset page has local details too.
If your pump’s whining, your motor’s stalling, or you’re just not sure what’s failing, call us at 515-292-2599 and we’ll get you scheduled for a bench diagnosis. We’ve done enough hydraulic pump and motor repair work on trucks, lifts, and shop equipment around Ames that we can usually tell you within the first hour on the bench what’s actually wrong and what it’ll cost to fix.
Frequently Asked Questions
How long does hydraulic pump and motor repair usually take?
A straightforward pump swap can be done same day or next day if we have the part in stock. A full rebuild with a worn housing or a PTO motor replacement can take two to three days depending on parts availability.
Can you rebuild my pump instead of replacing it?
Often yes. If the housing isn’t scored and the shaft is straight, a rebuild kit with new seals, gears, and wear plates can bring it back to spec for less than a full replacement.
Do you work on pumps for flat bed trucks and lift trucks?
We do. Flat bed truck hydraulic pump replacement and lift truck pump rebuilds are two of the most common jobs we run through our shop each month.
What does it mean if my hydraulic pump is loud but still working?
A whining or growling pump is usually cavitating or has worn internal gears letting oil bypass instead of building pressure. It’ll keep working for a while, but it’s telling you a repair is coming.
Do you deliver equipment back after a pump repair?
Yes, we handle delivery within about a hundred miles of our shop for larger units like lifts, and we factor mileage into the quote up front so there’s no surprise on the invoice.
Written by Josiah Ragsdale, Ames Hydraulics