Hercules Cylinder Rebuild in Ames, Iowa
A Hercules cylinder rebuild is one of the most common jobs that comes through our shop door at 210 Freel Dr. Hercules cylinders show up in car lifts, log splitters, dump beds, and all kinds of ag and construction attachments around central Iowa, and they all fail the same handful of ways — scoring on the rod, a blown seal pack, or a lock mechanism that won’t hold pressure anymore. When one of those cylinders starts weeping oil or dropping under load, a Hercules cylinder rebuild is almost always cheaper and faster than buying new, as long as the bore isn’t too far gone to save.
What a Hercules cylinder rebuild includes at our shop
We don’t just swap a seal kit and call it done. A proper Hercules cylinder rebuild means pulling the cylinder off the machine, tearing it all the way down, inspecting the bore and rod for scoring, and putting it back together with seals matched to spec. On a recent car-lift job we ran, the rebuild also required a new lock cable since the old one had stretched and wasn’t releasing the safety latch clean.
- Remove the cylinder from the lift, splitter, or attachment
- Full teardown and inspection of bore, rod, and gland
- Replace head seal, piston seal, U-seals, and wiper seal to spec (we commonly run HS686-342 head seals, P-AA1062 piston seals, and MCU-1500-D wipers depending on bore size)
- Hone or resurface the bore if scoring is light enough to save
- Reinstall, bleed, and cycle-test under load before we call it finished
If you’re trying to figure out what a job like this runs before you call, our hydraulic cylinder rebuild cost guide breaks down pricing by cylinder size and condition, and it applies just as much to a Hercules cylinder rebuild as it does to any other brand we work on.
How we do a Hercules cylinder rebuild
Every Hercules cylinder rebuild starts on the bench, not in a parts catalog. We measure the bore, check the rod for pitting or scoring, and only then pull seal numbers — because guessing on seal sizing is how you end up doing the job twice. Scoring is the number one reason a Hercules cylinder rebuild doesn’t hold: if the rod or bore has deep grooves, a fresh seal kit will still leak within weeks because the seal has nothing smooth to ride against. We’re honest about that upfront instead of letting a customer find out the hard way.
We also see this a lot on two-post and four-post car lifts: after we finish a Hercules cylinder rebuild on one side, the other cylinder blows out shortly after because it’s been running just as many hours and just as much wear. We flag that possibility before we start so it’s not a surprise later. If the rebuild doesn’t hold — meaning the bore was too scored to seal properly — the only real fix is a new cylinder, which adds cost on top of the rebuild labor already done. For shops working on lifts specifically, our hydraulic cylinder repair crew handles this exact scenario regularly, and the same crew covers excavator work too — see our excavator cylinder rebuild page if that’s more your equipment.
Common Failure Signs Before a Hercules Cylinder Rebuild
Most customers call us after they’ve already noticed a problem, not before. Here’s what usually points to a Hercules cylinder rebuild being the right call:
- Oil weeping around the rod seal even when the machine is sitting still
- A lift or bed that creeps down slowly under load instead of holding position
- Visible scoring or pitting on the exposed rod
- A lock release cylinder (common on Rotary-style lifts) that won’t disengage the safety latch — sometimes as cheap as a $145 lock cylinder swap if that’s the only culprit
- Jerky or uneven movement as the cylinder cycles, which usually means internal bypass past a worn piston seal
If you’re catching it at the weeping-seal stage, a Hercules cylinder rebuild is a straightforward fix. If you wait until the rod is badly scored or the bore has heat-checked, you’re looking at replacement instead of rebuild — which is a bigger bill.
How much does a Hercules cylinder rebuild cost
Pricing on a Hercules cylinder rebuild depends on cylinder size, seal availability, and how bad the scoring is. As a general range for what we see come through the shop:
- Small cylinders (lock releases, minor lift components): roughly $250–$500 including parts and labor
- Mid-size cylinders (single lift post, splitter cylinders): typically $500–$900
- Larger cylinders with heavier scoring or a full bore hone: $900–$1,500+
If the rebuild doesn’t hold because the bore was too far gone, replacing a smaller cylinder usually adds around $300 to the job, and a larger replacement cylinder can add closer to $800 on top of the rebuild labor already invested. We also charge mileage for on-site work — typically calculated as round trip miles for jobs within 40 miles of our Ames shop, with a technician doing the lift-out and reinstall on location when the equipment can’t be trailered in.
We serve shops and equipment owners well beyond Ames proper too — check our hydraulic cylinder rebuild Iowa page if you’re calling from outside the immediate area.
If you’ve got a cylinder weeping oil, a lift that won’t hold, or a splitter that’s lost its punch, call us at 515-292-2599 and we’ll walk through what a Hercules cylinder rebuild would look like for your specific machine before you spend a dime.
Frequently Asked Questions
How long does a Hercules cylinder rebuild take?
Most single-cylinder rebuilds are done in one to two days once the cylinder is off the machine, depending on parts availability and how much honing the bore needs.
Can you rebuild a Hercules cylinder on-site instead of in the shop?
Sometimes, yes. We can do lift-out and reinstall on location within 40 miles of our Ames shop, though the actual teardown and reseal usually happens back at the bench where we have the tooling.
What’s the difference between rebuilding and replacing a Hercules cylinder?
A rebuild reuses the existing cylinder body and rod with new seals, which works if the bore and rod aren’t badly scored. Replacement is needed when the metal itself is too damaged for seals to hold.
Why did my other cylinder fail right after you rebuilt this one?
It’s a common pattern, especially on two-post lifts — both cylinders usually have similar hours and wear, so once one fails the other often isn’t far behind. We flag this possibility before starting any job.
Do you work on Hercules cylinders for car lifts specifically?
Yes, lift cylinders and lock release cylinders are some of the most common Hercules cylinder rebuild jobs we handle, including full lock cable replacement when needed.
Written by Josiah Ragsdale, Ames Hydraulics