Hyster S100 Lift Cylinder Rebuild
If your Hyster S100 is dropping under load, leaking down overnight, or that lift cylinder is weeping fluid down the mast, you’re in the right place. We’ve done more than a few of these, and a Hyster S100 lift cylinder rebuild is one of the jobs we can usually turn around fast — either in our Ames shop or at your yard if you’re within 40 miles.
These forklifts see hard years of use, and the lift cylinder takes the brunt of it. Chrome rod scoring, worn piston seals, and a bore that’s lost its finish are the usual suspects. We don’t guess on this stuff — we pull the cylinder, inspect it on the bench, and tell you straight whether a rebuild will hold or whether you’re better off with new.
How We Do a Hyster S100 Lift Cylinder Rebuild
Every Hyster S100 lift cylinder rebuild we do follows the same basic path, because skipping steps is how you end up doing the job twice.
- Remove the cylinder from the mast and tag hoses/fittings so reassembly is fast and correct
- Disassemble and inspect the rod, bore, and gland for scoring, pitting, or bore wear beyond spec
- Hone or resurface the bore if it’s within tolerance, or flag it for sleeving/replacement if it’s not
- Install fresh seals — for a lift cylinder this size we’re typically running a 3″ x 0.062″ x 3/16″ head seal, a 3″ x 1.062″ x 3.25″ piston seal, matching U-seals, and a 1-1/2″ x 3″ wiper seal
- Reassemble, reinstall on the mast, and bleed the system to purge air and confirm smooth, even travel
We also check the lock cable and lock release cylinder while we’re in there — a worn lock cylinder or a frayed cable is a cheap fix compared to what happens if it fails while the forks are loaded. If your S100 is due, we can knock both out in the same visit.
Common Failure Signs Before You Even Call Us
Most customers calling about a Hyster S100 lift cylinder rebuild describe one of these:
- Slow drift down under load — usually worn piston seals letting fluid bypass internally
- Visible fluid on the rod or pooling at the base — rod seal or wiper seal has given up, often from rod scoring letting debris past
- Jerky or uneven lift — air in the system, or scoring causing the seals to ride unevenly in the bore
- Won’t hold at full height — internal bypass severe enough that the cylinder can’t maintain pressure
Here’s the part we’re always upfront about: on a two-cylinder mast, it’s really common for the other lift cylinder to blow out shortly after we rebuild the first one. Same age, same mileage, same wear pattern — it’s just a matter of which one gives out first. We’ll tell you if the second cylinder looks close so you’re not surprised by a second call three weeks later.
If scoring on the rod or bore is bad enough that a rebuild won’t hold seals reliably, we’ll say so before we start, not after you’ve paid for parts twice.
How Much Does a Hyster S100 Lift Cylinder Rebuild Cost
Pricing depends on how much of the cylinder we’re saving versus replacing, but here’s the real range we typically see on a Hyster S100 lift cylinder rebuild:
- Standard rebuild (rod/bore in good shape, new seals only): generally the base labor plus seal kit — most jobs land in the $400-$700 range
- Rebuild with moderate scoring requiring honing or a new rod: add roughly $300 on top of base rebuild pricing
- If the rebuild doesn’t hold and a new cylinder is needed: add up to $800 depending on the cylinder
- Mileage for on-site work: if you’re within 40 miles of our shop and don’t need a trailer, mileage is usually a modest flat add rather than a per-mile shock
We break down full pricing logic, including how scoring severity changes the number, on our hydraulic cylinder rebuild cost guide. If your S100 rebuild turns into a bigger job — say the mast bushings or the base are also worn — we’ll walk you through that before doing anything extra.
Not every cylinder job that comes through the shop is a Hyster S100 lift cylinder rebuild. We handle everything from smaller lock release cylinders to full excavator cylinder rebuilds out of Boone, and if you’re outside Ames proper we cover a good chunk of the state — check our hydraulic cylinder rebuild locations across Iowa to see if you’re in range.
Bring your S100 in, or give us a call and we’ll figure out if this is a shop job or an on-site visit. Call 515-292-2599 and we’ll get you a straight answer on your Hyster S100 lift cylinder rebuild — no guessing, no runaround.
Frequently Asked Questions
How long does a Hyster S100 lift cylinder rebuild take?
Most rebuilds are a one-day turnaround once the cylinder is on our bench, assuming we don’t need to source a new rod or sleeve. If we’re doing it on-site, plan on the same day plus travel time.
Can you rebuild just one lift cylinder, or do both need to be done at the same time?
We can absolutely do just one. That said, on a two-cylinder mast it’s common for the untouched cylinder to fail soon after, so we’ll check its condition and give you an honest read on whether it’s worth doing both now.
What causes the lift cylinder to leak on a Hyster S100?
Usually it’s worn piston seals or a wiper seal that’s let debris past, often tied to scoring on the rod or bore from years of dirt and grit working past a failing seal.
Do you come to our location for a Hyster S100 lift cylinder rebuild?
Yes, if you’re within 40 miles of our Ames shop we can do the removal and reinstall on-site, with mileage added to the invoice. Farther out, we cover other parts of Iowa too — just call and ask.
What if the rebuild doesn’t fix the leak?
If scoring or bore damage is too severe for seals alone to hold, we’ll tell you before moving forward with a full replacement, and we credit the diagnostic time toward the new cylinder cost when possible.
Written by Josiah Ragsdale, Ames Hydraulics