Genie S105 Hydraulic Pump Repair in Ames, Iowa
When a Genie S105 boom lift won’t raise, won’t hold, or groans like it’s fighting itself, the hydraulic pump is usually the first place we look. We do Genie S105 hydraulic pump repair at our shop on Freel Dr and out in the field, and we’ve pulled enough gear pumps off these units to know the pattern: worn gear sets, a relief valve that’s drifted out of spec, or a PTO coupling that’s chewed itself up from years of vibration. If your lift is acting sluggish, whining under load, or dumping oil somewhere it shouldn’t, that’s Genie S105 hydraulic pump repair territory, not a fluid top-off fix.
How we handle Genie S105 hydraulic pump repair
Every Genie S105 hydraulic pump repair job starts the same way – we hook up a pressure gauge and load the boom to see where the numbers fall apart. If the pump can’t hold pressure under load, we’re usually looking at worn gear pump internals or a relief valve that’s lost its set point. We carry gear pumps in common displacements (we regularly stock a 15 GPM reel-style gear pump for exactly these jobs) along with the ORB-6 hub and stub shaft hardware that connects the pump to the PTO. If the shaft coupling or steel collar is worn instead of the pump itself, we’ll catch that before we start swapping parts you don’t need. For pumps that are salvageable, we rebuild them right on the bench rather than replace them outright – new seals, gears, and a fresh relief valve set to spec, usually in the 3000-7000 PSI adjustable range depending on the lift’s circuit design.
We also check the whole hydraulic circuit, not just the pump housing, because a Genie S105 hydraulic pump repair that ignores a bad hose barb fitting or a leaking JIC connection is a repair that comes back in six months. If your machine is also showing signs the pump won’t build pressure at all, take a look at our page on hydraulic pump not building pressure for what that usually points to before you even call us.
Common Genie S105 pump failures and what causes them
Most of the Genie S105 hydraulic pump repair calls we get fall into a short list of failure modes:
- Worn gear pump gears causing low flow and slow boom response, especially noticeable on longer reaches
- Relief valve drift, where the pump builds pressure but the boom won’t hold a load without creeping down
- PTO shaft or hub wear (the 1-7/8-inch ORB-6 stub and hub setup) causing a rattling or clunking noise under load
- Fitting and hose barb leaks at the pump inlet/outlet, often 1-1/4-inch hose barb or 3/4-inch male JIC connections weeping fluid
- Aerated hydraulic fluid from a cracked suction line, which sounds like pump failure but isn’t
If your S105 is throwing fault codes or the boom hesitates before moving, we’ll pull the pump housing and check gear wear against tolerance before quoting anything. A lot of what looks like Genie S105 hydraulic pump repair turns out to be a $40 fitting – we tell you either way.
How much does Genie S105 hydraulic pump repair cost
Straight labor for pulling and reinstalling a Genie S105 pump usually runs $150-$300 depending on access and whether we’re on-site or in the shop. A full pump replacement – new gear pump, fittings, ATF hydraulic fluid, and labor – typically lands between $1,200 and $2,000 on an S105, depending on which pump displacement your machine takes and whether the PTO hub needs replacing alongside it. A rebuild rather than a full swap runs less, usually $600-$1,100, since we’re reusing the housing and just replacing gears, seals, and the relief valve. If we have to come to you, add mileage – we charge for a round trip within 100 miles of our shop, plus a bucket of ATF fluid if the reservoir needs a full flush. Cylinder work on the same machine is priced separately; our hydraulic cylinder rebuild cost guide breaks that down if your boom cylinder is leaking alongside the pump issue.
What’s included when we quote a job
A typical Genie S105 hydraulic pump repair quote includes the pump itself (new or rebuilt), the valve work if the relief valve needs resetting or replacing, installation labor, and delivery mileage if we’re bringing the machine back to you instead of you hauling it in. We don’t pad quotes with parts you don’t need – if the hub and shaft are fine, we leave them alone.
We work on Genie lifts alongside a lot of other heavy equipment in central Iowa, including forklifts, skid steers, and flatbed truck hydraulics. If your operation runs a mixed fleet, our material handling hydraulic repair work covers a lot of the same gear pump and PTO troubleshooting we do on aerial lifts. And if you’re further out toward Winterset and need cylinder work done closer to home, check our hydraulic cylinder repair Winterset page for that side of the state.
If your Genie S105 is sitting dead on the yard or straining to lift a load it used to handle fine, don’t wait on it. Call us at 515-292-2599 and describe what the boom’s doing – we can usually tell you over the phone whether you’re looking at a full Genie S105 hydraulic pump repair or something smaller.
Frequently Asked Questions
How much does it cost to repair a hydraulic pump on a Genie S105 boom lift?
Most Genie S105 hydraulic pump repair jobs run $600-$2,000 depending on whether we rebuild the existing pump or replace it outright. Labor alone for removal and reinstall is usually $150-$300.
Why won’t my Genie S105 lift the boom without straining?
That usually points to worn gear pump internals losing flow, a relief valve set too low, or air getting into the system through a cracked suction line. We pressure test to narrow it down before quoting repair.
Can you rebuild the Genie S105 pump or do I need a new one?
If the housing and shaft are in good shape, we rebuild with new gears, seals, and a reset relief valve for less than a full replacement. If the housing’s cracked or scored badly, replacement is the better call.
Do you work on Genie lifts on-site or do I have to bring it in?
Both. We’ll come to your yard within about 100 miles of our shop for a mileage charge, or you can bring the lift or pump to us at 210 Freel Dr in Ames.
What fluid does the Genie S105 hydraulic pump use?
Most S105 units run on ATF hydraulic fluid rather than standard hydraulic oil. We carry it by the bucket and top off or fully flush the reservoir during a pump repair as needed.
Written by Josiah Ragsdale, Ames Hydraulics