Hydraulic Pump Replacement in Ames, Iowa
When a pump quits pushing fluid, nothing else on the machine works right. We do hydraulic pump replacement on everything that comes through our bay at 210 Freel Dr — flatbed trucks, shop lifts, skid steers, log splitters, and gear pumps buried in equipment you wouldn’t expect. If your rig is groaning, running hot, or just sitting dead in the yard, there’s a good chance hydraulic pump replacement is the fix, not a Band-Aid.
We’ve swapped gear pumps rated anywhere from a few gallons a minute up to 15 GPM units running 18,000 RPM under load, and we’ve rebuilt plenty of pumps that were still salvageable instead of pushing a full replacement on someone who didn’t need it. That’s the difference between a shop that fixes hydraulics for a living and one that just sells parts.
How We Handle Hydraulic Pump Replacement
Every hydraulic pump replacement job starts the same way — we don’t just yank the old pump and bolt on a new one. We check the whole system first, because a bad pump is sometimes a symptom of something else, like a clogged suction line or a relief valve stuck wide open. If the pump itself is the problem, we pull it, match it to the drive coupling and mounting pattern, and confirm GPM and PSI ratings against the equipment’s actual duty cycle.
- Drain and inspect the reservoir fluid for metal shavings or burnt oil smell
- Pull the old pump and check the coupling, shaft, and PTO hub for wear
- Match a new or rebuilt gear pump to the correct GPM and pressure rating
- Install new hoses, fittings, and O-rings — reusing worn seals is asking for a leak later
- Set relief valve pressure, usually in the 2,000 to 7,000 PSI range depending on the machine
- Run the system, check for leaks, and test under load before we call it done
On flatbed trucks, hydraulic pump replacement labor usually runs longer than the parts themselves because of how buried the pump is behind the PTO. On material handling equipment and lifts, access is easier but the stakes are higher — a lift pump that fails under a loaded platform isn’t something we cut corners on. If you’re dealing with a lift or forklift specifically, our material handling hydraulic repair page covers more on that side of the shop.
Signs You Need Hydraulic Pump Replacement
Most people don’t call us the moment a pump starts going bad — they call after it’s already causing bigger problems. Here’s what we hear most often before a hydraulic pump replacement:
- Whining or grinding noise that gets worse under load
- Slow or weak cylinder movement, especially on lifts and dump beds
- Fluid running hot within minutes of startup
- System that won’t build pressure at all, even with good fluid levels
- Visible fluid leaking from the pump housing or shaft seal
- Foamy or milky-looking hydraulic fluid
If the system won’t build pressure but the pump isn’t obviously dead, it’s worth reading through our page on a hydraulic pump not building pressure before assuming full replacement is the answer. Sometimes it’s a cracked suction line or a worn relief valve, and hydraulic pump replacement isn’t actually needed yet. We’d rather tell you that up front than sell you a pump you don’t need.
How Much Does Hydraulic Pump Replacement Cost
Cost depends heavily on the machine and whether we’re rebuilding the existing pump or installing new. A straightforward gear pump swap on a flatbed truck or piece of ag equipment typically runs $350 to $700 in labor alone, not counting the pump itself, which can range from $200 for a basic gear pump to $1,200+ for a higher-flow or higher-pressure unit. Lift pump replacements — including the pump, valves, installation, and delivery within 100 miles of our shop — commonly land in the $900 to $1,800 range depending on lift size and access difficulty.
Rebuilding a pump instead of replacing it outright usually saves 30-40% compared to a full hydraulic pump replacement, assuming the housing and gears aren’t scored beyond repair. We’ll tell you straight during diagnosis which route makes financial sense — sometimes a $250 rebuild gets you another few years, other times the wear is bad enough that hydraulic pump replacement is cheaper long-term than throwing parts at a tired unit. If you’re weighing pump versus cylinder issues on the same machine, our cylinder rebuild cost guide breaks down that side of things too.
Every hydraulic pump replacement quote includes shop materials, fittings, and enough hydraulic fluid to get the system bled and running right — we don’t nickel-and-dime you on the small stuff after we’ve already got the machine apart.
If your equipment is dead, leaking, or just not lifting like it used to, don’t keep running it and hoping. Call us at 515-292-2599 and we’ll walk through what you’re seeing and get you scheduled for a look at the pump — or the whole system if that’s what it needs.
Frequently Asked Questions
How long does hydraulic pump replacement take?
Most gear pump swaps on trucks or ag equipment take half a day once the machine is in our bay. Lift pump replacements with valve work can take a full day, especially with delivery involved. We’ll give you a realistic timeframe once we’ve seen the setup.
Can you replace a hydraulic pump on-site or does it have to come to your shop?
We prefer working from our shop at 210 Freel Dr because we’ve got the fittings, hose stock, and test setup on hand, but we do handle on-site work for larger equipment that can’t be trailered easily. Call 515-292-2599 and we’ll figure out what makes sense for your situation.
How do I know if it’s the pump or the valve that’s bad?
Weak lift, no pressure, and hot fluid can point to either. We test pressure at the pump outlet and check valve function separately before recommending hydraulic pump replacement, so you’re not paying for a part swap that doesn’t fix the problem.
Do you use new pumps or rebuilt pumps?
Both, depending on the equipment and your budget. Some jobs call for a new gear pump rated to the machine’s exact GPM and RPM specs; others are fine with a rebuilt unit that costs less and still holds up under normal use.
What’s the difference between hydraulic pump replacement and a rebuild?
Replacement means installing a new or remanufactured pump outright. A rebuild means we open up your existing pump, replace worn gears, seals, and bearings, and reinstall it. Rebuilds cost less but only work if the housing isn’t damaged.
Written by Josiah Ragsdale, Ames Hydraulics