Genie S65 Lift Cylinder Repair in Ames, Iowa
When a Genie S65 boom lift starts sagging down on its own overnight, or one side holds while the other won’t lift square, you’re looking at a Genie S65 lift cylinder repair, not a fluid top-off. We’ve had these cylinders on the bench more times than we can count, and almost every time the story is the same: the bore has scoring, the seals are chewed up, and the lock cable that’s supposed to hold the boom in place is stretched or shot. This isn’t a job you patch with a bottle of Lucas Oil stop-leak — the barrel wall is metal-on-metal damaged and it has to be rebuilt or replaced.
What Causes a Genie S65 Lift Cylinder to Fail
Most of the Genie S65 lift cylinder repair calls we get start with one of these symptoms:
- Boom drifts down slowly when parked, sometimes an inch or two overnight, sometimes a foot by morning
- One cylinder holds pressure fine, but the other side leaks past the piston seal and won’t stay up under load
- Visible fluid streaking down the cylinder rod or pooling at the base of the lift
- The lock cable feels loose or won’t engage, so the platform doesn’t lock at height
- Grinding or a rough feel when the boom extends, which usually means the bore is already scored
Scoring is the root cause in the vast majority of the cylinders we pull for a Genie S65 lift cylinder repair. Once the chrome plating on the rod or the bore wall gets a scratch — from dirt in the fluid, a worn wiper seal letting grit in, or just decades of use — every seal that rides past that scratch starts leaking a little faster than the last one. It snowballs from a slow drift to a hard failure.
How We Do Genie S65 Lift Cylinder Repair
Here’s what an actual Genie S65 lift cylinder repair looks like on our bench, step by step:
- Remove the cylinder from the boom, cap the ports, and haul it to the shop
- Disassemble and inspect the bore and rod for scoring, pitting, or out-of-round wear
- Hone or replace the barrel if the scoring is light; if it’s deep, the whole cylinder gets swapped, not patched
- Install a full seal kit — head seal (HS686-342), piston seal (P-AA1062), U-seals, and a wiper seal (MCU-1500-D) sized to fit the S65 bore
- Replace the lock release cable if it’s stretched, frayed, or won’t hold tension anymore
- Reinstall the cylinder, bleed the system, and cycle the boom under load to check for drift
We’re upfront about one thing before we start: it’s really common for the other cylinder on a Genie S65 to blow out shortly after we rebuild this one. They’re the same age, they’ve seen the same fluid contamination, and once one side is fixed, the other side takes on more of the load. If your Genie S65 lift cylinder repair only covers one side, budget for the possibility the second one follows within a few months.
How Much Does Genie S65 Lift Cylinder Repair Cost
A straightforward rebuild — remove, rebuild, reinstall, and bleed — usually runs in the $450 to $700 range depending on seal availability and whether the lock cable needs replacing too. If the bore is too scored to save and the rebuild won’t hold pressure, you’re into a new cylinder instead, which adds roughly $300 to $800 on top of labor depending on which side of the lift it is. We also charge mileage for on-site work — typically calculated per round trip within about 40 miles of our Ames shop, no trailer needed for most S65 jobs. For a broader breakdown of what drives cylinder rebuild pricing across different equipment, our hydraulic cylinder rebuild cost guide walks through it in more detail.
We’ve done this same style of Genie S65 lift cylinder repair for scissor lifts, and we handle similar work for customers who need hydraulic cylinder repair in Winterset or elsewhere in the region — the failure patterns on aerial lift cylinders are pretty consistent whether the machine is parked in Ames or forty miles out. If you’re anywhere else in the state, our hydraulic cylinder rebuild Iowa page covers the areas we run mileage service to.
What to Expect Before You Call
Before you bring it in, take a look at the fluid level and check whether both cylinders are leaking or just one — that changes the scope and the price. Snap a photo of the rod where it’s scored if you can see it. That gives us a head start diagnosing whether your Genie S65 lift cylinder repair is a straightforward reseal or a full cylinder swap before you even get here.
If your S65 is drifting, leaking, or won’t lock at height, don’t wait for it to get worse — a scored bore only gets more expensive the longer it runs. Call us at 515-292-2599 and we’ll get your Genie S65 lift cylinder repair scheduled and back on the job site.
Frequently Asked Questions
How long does a Genie S65 lift cylinder repair take?
Most rebuilds take one to two days once the cylinder is on our bench, depending on parts availability for the seal kit. On-site removal and reinstall adds time depending on lift access.
Can you rebuild the cylinder or does it need to be replaced?
It depends on how bad the scoring is. If the bore and rod are still smooth enough to seal, we rebuild it. If there’s deep scoring or pitting, a rebuild won’t hold pressure long-term and we’ll recommend a new cylinder instead.
Why did my other lift cylinder fail right after you fixed the first one?
Both cylinders on a Genie S65 usually have the same age and fluid history. Once one side is repaired and taking full load again, the weaker seals on the other side often give out within months. We flag this risk upfront.
Do you come out to do the cylinder removal or do I need to bring the lift in?
We can do on-site removal for most Genie S65 lift cylinder repair jobs within about 40 miles of Ames, no trailer required. Beyond that we charge standard mileage.
What does it cost if the rebuild doesn’t hold and I need a new cylinder?
Add roughly $300 to $800 on top of the rebuild labor, depending on which cylinder it is and current cylinder pricing. We’ll tell you before we order anything.
Written by Josiah Ragsdale, Ames Hydraulics