Genie S45 Hydraulic Pump Repair in Ames, Iowa
When a Genie S45 boom lift stops climbing, stops rotating, or just sits there groaning while the engine revs, the hydraulic pump is usually the first thing we check. We’ve pulled enough of these units apart on our bench to know that Genie S45 hydraulic pump repair almost always comes down to worn gear sets, a tired relief valve, or a pump that’s been starving for fluid so long it’s cooked itself from the inside out. If your lift is on a jobsite outside of Story County right now, we still want the call — we run mileage-based delivery and can often get a rebuilt or replacement pump to you within 100 miles of the shop.
How We Handle Genie S45 Hydraulic Pump Repair
Every Genie S45 hydraulic pump repair starts the same way: we drain the reservoir, pull the pump, and cut it open to see what actually failed instead of guessing. Sometimes the gear pump itself is shot — worn gear faces, scored housing, a shaft that’s got play in it that shouldn’t be there. Other times the pump is fine and the real problem is a stuck relief valve or a suction line that’s been sucking air. We keep gear pumps rated for the flow these lifts need, along with the 1 1/4″ hose barb fittings and 3/4″ JIC fittings that tie into the Genie’s manifold, so we’re not waiting on a supplier to start the job.
If the pump housing and shaft are in good shape, we’ll rebuild it — new seals, bearings, and gears pressed in on our bench. If the casting is cracked or the wear is too far gone, we replace it outright with a comparable gear pump and set the relief valve back to factory pressure, usually in the 2500-3000 PSI range depending on the S45’s hydraulic system spec. Either way, we bleed the system, cycle the boom through full extension and rotation, and check for drift before we call it done.
What Usually Fails on These Lifts
- Gear pump wear from running low on hydraulic fluid or using the wrong ATF-based fluid
- Relief valve stuck open or set too low, causing weak lift or slow boom response
- Worn shaft seals leaking fluid at the pump coupling
- Contaminated fluid chewing up the gear faces over time
- PTO or coupling hub wear transferring load unevenly into the pump shaft
Common Symptoms We See Before the Pump Fails Completely
Most Genie S45 hydraulic pump repair calls start with the same complaints: the boom raises slow, it won’t hold position under load, or there’s a whining noise when the operator tries to swing the platform. Sometimes it’s oil showing up under the machine that wasn’t there last week. If you’re catching any of that early, it’s worth a look before the pump goes completely — a $150 fitting or seal today beats a full pump teardown next month. We see the same failure pattern on flatbed truck hydraulic systems and other material handling equipment, so if your S45 shares a yard with other hydraulic gear, it’s worth having us look at the whole lineup while we’re there. We’ve written more on what it means when a hydraulic pump won’t build pressure if you want the longer breakdown on diagnosing that specific symptom before you call.
If the pump is fine but the cylinders are the weak link — slow drift, seals leaking at the rod — that’s a different repair, and we cover the details in our cylinder rebuild cost guide. A lot of the boom lifts and forklifts we service for material handling hydraulic repair in Iowa come in with both problems at once, so we always check the whole circuit, not just the part the customer flagged.
How Much Does Genie S45 Hydraulic Pump Repair Cost
Pricing depends on whether the pump can be rebuilt or needs full replacement. A straightforward rebuild — new seals, bearings, gear set — usually runs between $650 and $1,100 in parts and labor. A full pump replacement, including a new gear pump, relief valve, and the fittings to tie it back into the S45’s manifold, typically lands between $1,400 and $2,600 depending on pump availability and whether we’re also swapping valves. Labor alone on a straightforward Genie S45 hydraulic pump repair runs $95-$150 an hour, and most jobs take between 3 and 6 hours once the pump is off the machine. If we need to deliver a rebuilt lift or pump back to your site, mileage is billed round trip within 100 miles of our shop at 210 Freel Dr.
Add-ons that come up often: a 5-gallon bucket of ATF-type hydraulic fluid runs around $60-$80, and if the PTO hub or output shaft is worn from years of uneven load, that’s another $200-$400 in parts. We’ll always give you the number before we start cutting anything open — no surprise invoices.
Why Bring the S45 to Us
We’re a family-run shop, not a dealership waiting room. When you bring in a lift for Genie S45 hydraulic pump repair, the same technician who diagnoses it is usually the one turning the wrenches and the one who calls you when it’s ready. We stock gear pumps, relief valves, and the JIC and hose barb fittings these machines actually use, so we’re not waiting a week on parts for something we’ve fixed a dozen times before.
If your Genie S45 is stuck, slow, or leaking, don’t wait for it to strand a crew on a jobsite. Call us at 515-292-2599 and tell us what the lift is doing — we’ll walk you through what to check and get it scheduled for Genie S45 hydraulic pump repair at our Ames shop or arrange delivery if you’re within our service radius.
Frequently Asked Questions
How do I know if my Genie S45 pump is bad or if it’s just low on fluid?
Check the reservoir level first and look for fluid under the machine. If the fluid’s full and clean but the boom still moves slow or won’t hold position, the pump or relief valve is likely the problem, not the fluid.
Can you rebuild the pump instead of replacing it?
Yes, if the housing and shaft aren’t damaged we rebuild with new seals, bearings, and gears. We only recommend full replacement when the casting is cracked or wear has gone too far to bring back to spec.
How long does a Genie S45 hydraulic pump repair take?
Most jobs take 3-6 hours of shop labor once the pump is pulled, plus time to source parts if we don’t have the exact gear pump on hand. We’ll give you a realistic timeline after we inspect it.
Do you come pick up the lift or does it need to come to the shop?
We can deliver within 100 miles of our Ames shop, billed round trip mileage. For anything further, you’re welcome to bring the lift or the pump itself to 210 Freel Dr.
What’s the biggest cause of pump failure on these boom lifts?
Running low on hydraulic fluid or using the wrong fluid type wears out the gear faces fast. Contaminated fluid from an old, unflushed system is the second most common cause we see.
Written by Josiah Ragsdale, Ames Hydraulics