Hydraulic Power Unit Repair in Ames, Iowa
When a two-post lift won’t raise, a shop press dies mid-stroke, or a dock plate quits lifting, the problem almost always traces back to the power unit — the pump, motor, valve block, and reservoir bolted together in one housing. We do hydraulic power unit repair on that exact kind of equipment every week, and most of the time it’s a lot cheaper and faster than tearing out the whole unit and starting over.
How We Handle Hydraulic Power Unit Repair
Our approach to hydraulic power unit repair starts on the bench, not with a parts catalog. We pull the unit, drain and inspect the fluid for metal or milky contamination, and check the pump, motor, and valve body separately before we ever quote a rebuild. That’s the difference between guessing and knowing what’s actually wrong.
- Pull the power unit and inspect fluid, filter, and reservoir for contamination or debris
- Rebuild or replace worn cylinders — we’ve rebuilt plenty of single-cylinder units where the seals and packing had just given up
- Re-thread and reseal fittings, including retaping and tightening leaking blender screws
- Replace the safety shutoff cable and pull button when the interlock has worn out or snapped
- Test the motor and pump under load before the unit goes back on the lift, press, or dock equipment
- Off-load and reinstall the rebuilt or new unit, including misc. hookup tasks a one-tech crew handles on site
If your fleet runs a mix of two-post lifts, in-ground lifts, or custom shop equipment, we’ve built and installed custom hydraulic power units for Iowa shops that needed something the factory catalog didn’t offer. Our main hydraulic power unit repair service page has more detail on the standard work order if you want to see what a typical job covers before you call.
Common Power Unit Failures We See on the Bench
Most of the hydraulic power unit repair calls we get fall into a handful of patterns, and knowing which one you’ve got helps us quote faster over the phone.
Weak or No Lift
Usually a worn pump, a stuck check valve, or a cylinder that’s lost its seal integrity. On columns and lift arms we’ve seen driver-side arm pins wear enough to throw the whole lift out of level even when the power unit itself is fine — so we check the whole chain, not just the pump.
Leaking at the Base or Fittings
Loose fittings, a cracked reservoir seam, or a blender screw that was never taped right at the factory. This one’s usually a quick fix once we get eyes on it.
Won’t Shut Off or Won’t Reset
A worn or snapped safety shutoff cable, or a stuck pull button. We replace these outright rather than patch them — it’s a safety interlock, not a part worth gambling on.
Motor Runs but Nothing Moves
Usually a bad pump coupling, a sheared shaft key, or a valve body that’s stuck open internally. This is where a bench teardown beats guesswork every time.
Some of this failure pattern work overlaps with pump-specific troubleshooting we’ve written up separately — if you’re running a Blackmer-style pump on your unit, our Blackmer pump troubleshooting guide covers symptoms we see on that hardware specifically.
How Much Does Hydraulic Power Unit Repair Cost?
The cost of hydraulic power unit repair depends heavily on whether we’re rebuilding what you’ve got or replacing the whole unit. Here’s roughly where jobs land:
- Single cylinder rebuild with seal kit: $200–$450 in parts and labor
- Safety shutoff cable and pull button replacement: $75–$150
- Fitting repair, re-taping, and leak fixes: $100–$250
- Full pump/motor rebuild on an existing unit: $600–$1,400
- Complete power unit replacement (including a Rotary Shockwave-style swap on a lift): $1,800–$4,500+ depending on tonnage and lift type
On larger replacement jobs — especially full power unit swaps on main lifts — we typically require a down payment before ordering parts, since these units are often special order. We also charge mileage for on-site work outside a 50-mile radius of our Ames shop; round trips inside that radius are included. We’ll always give you the real number before we start, not after.
If your equipment falls under material handling — forklifts, dock lifts, scissor lifts — our material handling hydraulic repair page walks through how those units differ from automotive lift power units.
Get Your Power Unit Fixed Right
Whether it’s a two-post lift that won’t hold weight, a press with a dead cylinder, or a full power unit that needs replacing, we’ve got the bench, the parts network, and the experience to get it done right the first time. Call Ames Hydraulics at 515-292-2599 and tell us what’s going on — we’ll walk you through what hydraulic power unit repair is going to take and what it’ll cost before we ever touch a wrench.
Frequently Asked Questions
How long does hydraulic power unit repair usually take?
A simple cylinder rebuild or fitting repair can be same-day or next-day. A full power unit replacement on a main lift usually takes 3–7 business days once parts arrive, since larger units are often special order.
Can you rebuild my power unit instead of replacing it?
In most cases, yes. We inspect the pump, motor, and valve body separately before quoting, and we’ll always rebuild if it’s cheaper and gets you the same reliability as a new unit.
Do you work on power units for lifts, presses, and dock equipment, or just cars?
All of the above. We’ve done hydraulic power unit repair on two-post and in-ground vehicle lifts, shop presses, and dock plate equipment across central Iowa.
What does it cost if you have to replace the whole power unit?
Full replacements typically run $1,800 to $4,500 or more depending on tonnage and lift type. We require a down payment on special-order units before we place the parts order.
Do you charge for on-site visits to fix a power unit?
We include round-trip mileage within 50 miles of our Ames shop. Beyond that radius, mileage is added to the invoice — we’ll quote it upfront when you call.
Written by Josiah Ragsdale, Ames Hydraulics