Hyster S150 Lift Cylinder Rebuild
If your Hyster S150 is dropping its forks slower than it used to, or it’s leaving a puddle under the mast at the end of the shift, you’re probably looking at a Hyster S150 lift cylinder rebuild before too long. We’ve pulled enough of these cylinders off S150 trucks around Ames to know exactly where they wear, and it’s almost always the same story: scored bore, chewed-up piston seal, and a wiper that quit doing its job a long time ago.
A Hyster S150 lift cylinder rebuild isn’t a mystery job for us. It’s bench work we do regularly, whether the forklift comes into our shop on Freel Dr or we’re loading up the truck and coming to you. We’ll say this up front, though — a lot of these lift trucks run two cylinders side by side, and once one has scored and blown a seal, the other one is usually not far behind. We tell customers that going in, because it’s better to know now than to get surprised in three months.
How we do a Hyster S150 lift cylinder rebuild
Every Hyster S150 lift cylinder rebuild we do follows the same basic sequence, because skipping steps is how you end up doing the job twice:
- Remove the cylinder from the mast and get it to a clean bench, no shortcuts here — dirt in a hydraulic cylinder is how you ruin new seals in a week
- Break it down completely and inspect the bore for scoring, pitting, or out-of-round wear
- Measure and match seals — on the S150 we’re typically looking at a 3-inch head seal, a 3-inch piston seal, U-seals in the 1-1/8″ range, and a 1-1/2″ wiper seal to keep contamination out going forward
- Hone or resurface the bore if it’s salvageable; if the scoring is too deep, we’ll tell you straight that a rebuild won’t hold and a new cylinder is the honest answer
- Reassemble with new seals, reinstall on the mast, and bleed the system so there’s no trapped air causing that spongy lift feel
We also check the lock cable and lock release cylinder while we’re in there, since on a lot of these trucks a worn lock cable is what let the operator overrun the lift in the first place. If you want the full breakdown of what parts we’re matching seal-for-seal, our hydraulic cylinder rebuild cost guide walks through the seal kit side of things in more detail.
Common Hyster S150 lift cylinder failures we see
Most calls for a Hyster S150 lift cylinder rebuild start with one of these symptoms:
- Slow drift down on the forks — usually a worn piston seal letting oil bypass internally
- Visible oil on the mast or rails — points to a failed wiper seal or head seal letting fluid past the rod
- Jerky or uneven lift — often air in the system after a slow leak, or scoring in the bore causing inconsistent seal contact
- Won’t hold a load at height — this is the one that gets attention fast, and it’s the clearest sign the cylinder needs to come off now, not next month
Scoring in the bore is the root cause behind most of these. Once the bore is scored, no seal kit in the world holds for long — that’s the honest truth, and it’s why we inspect the bore before we quote anything as a straight rebuild. If the bore’s too far gone, we’ll tell you a new cylinder is the better call rather than sell you a rebuild that won’t last.
How much does a Hyster S150 lift cylinder rebuild cost
Pricing on a Hyster S150 lift cylinder rebuild depends on how much of the cylinder we can save versus how much needs replacing outright. Here’s roughly what we see:
- Standard rebuild with new seal kit (head seal, piston seal, U-seals, wiper): typically $400–$700 depending on bore condition and labor
- If scoring is deep enough that the rebuild won’t hold and you need a full new cylinder instead: add roughly $300–$800 on top, depending on cylinder size
- Companion cylinder issues: it’s common for the second lift cylinder to start failing shortly after the first one is rebuilt, so budget for the possibility both need attention
- On-site service: mileage runs about $1 per mile round trip for jobs within 40 miles of our Ames shop, one technician, no trailer needed for most S150 lift cylinder work
We’ve handled this same style of Hyster S150 lift cylinder rebuild for shops that need us on location and for owners who trailer the truck in — either way works. If you’re in Winterset, our hydraulic cylinder repair in Winterset page covers what that on-site visit looks like. And if it turns out your equipment situation is closer to earthmoving gear than a forklift, our excavator cylinder rebuild service in Boone covers that side of things too.
We don’t guess on a Hyster S150 lift cylinder rebuild — we measure the bore, match the seals to spec, and tell you plainly if a rebuild will hold or if you’re better off with a new cylinder. That’s the same approach whether the truck rolls into our Freel Dr shop or we come to you. If your S150 is dripping, drifting, or won’t hold a load, call us at 515-292-2599 and we’ll get you scheduled.
Frequently Asked Questions
How long does a Hyster S150 lift cylinder rebuild take?
Most Hyster S150 lift cylinder rebuilds take a day or two once the cylinder is off the truck, depending on whether the bore needs honing and whether we have the seal kit in stock. If the other cylinder needs attention too, plan on a bit longer.
Can you rebuild just one cylinder if both look worn?
We can, but we’ll tell you upfront that when one lift cylinder on an S150 has scored and blown a seal, the other one is often close behind. Rebuilding one now and budgeting for the second down the road is a common approach.
What does it mean if the rebuild doesn’t hold?
If the cylinder bore is scored too deep, honing it out isn’t enough and a new seal kit won’t seal properly against a rough surface. In that case you’re looking at a full replacement cylinder instead of a rebuild.
Do you come to our location for a Hyster S150 lift cylinder rebuild?
Yes, we run on-site service within about 40 miles of our Ames shop for one technician, no trailer needed for most lift cylinder work. Mileage is billed round trip.
What parts get replaced in a typical rebuild?
A standard kit includes the head seal, piston seal, U-seals, and wiper seal sized to the S150’s cylinder bore. We also check the lock cable and lock release cylinder since those commonly wear alongside the lift cylinder.
Written by Josiah Ragsdale, Ames Hydraulics