Hydraulic and pneumatic · Wisconsin
Hydraulic and pneumatic repair in Wisconsin
Hydraulic power units, pumps, valves and cylinders, plus the air systems that run clamps, changers and actuators. Leaks, pressure that won’t hold, oil that runs hot and motion that’s slow or jerky.
What we fix
- Pressure won't build or hold
- Leaks and blown seals
- Oil running hot
- Slow or jerky motion
- Air system problems
Techs from the Milwaukee, Madison and Green Bay regions.
Quick answerLocalSpindle of Wisconsin repairs industrial hydraulic and pneumatic systems across the state, including Parker, Vickers (Eaton), Rexroth, Sun, Daikin, Yuken, Denison, SMC, Festo and Norgren components. We fix pressure loss, leaks, overheating, slow or erratic motion, valve and pump problems, cylinders, accumulators and air systems on machines and presses.
From our techs
Measure before you replace
Hydraulic troubleshooting goes wrong when parts get swapped on a guess. A system that won’t build pressure might have a worn pump, a relief valve set low or stuck open, internal leakage in a cylinder, or a valve bypassing. We put gauges in the right places and test each component, so the part that gets replaced is the one that failed.
Contamination causes most hydraulic failures. If we find dirty oil, water in the oil or a filter that’s been bypassing, we’ll fix that too, or the new pump will go the same way as the old one.
Hydraulics in Wisconsin weather
Cold mornings thicken hydraulic oil, and pumps cavitate on startup in cold buildings. Humid summers put water in tanks through breathers. Both shorten component life. We check tank heaters and breathers, oil grade and condition, and coolers, and help set up warm-up routines.
Pneumatics
Air problems hide everywhere: tool changers, clamps, drawbar unclamp, gripper fingers and blow-offs. Leaks waste money, water in the lines ruins valves, and low pressure causes intermittent faults. We check regulators, filters, dryers, valves and cylinders and find leaks.
Symptoms
What you're seeing, and what it usually means
The alarm names the axis or the unit. These are the causes we find behind it most often.
| What you’re seeing | What it usually means |
|---|---|
| Pressure won’t build | Worn pump, relief valve problem, or internal leakage. |
| Pressure drops under load | Cylinder or valve bypass, worn pump, or accumulator charge. |
| Oil running hot | Fouled cooler, relief dumping, internal leakage or the wrong oil. |
| Slow or jerky motion | Flow control, air in the system, cold oil or a sticking valve. |
| External leaks | Seals, fittings, hoses or a scored rod. |
| Air actuators sluggish | Low pressure, water in lines, leaks or worn valves. |
How we work it
Hydraulic and pneumatic: our approach
Gauge it
Pressures and temperatures at the right points.
Isolate
Pump, valve, cylinder or relief.
Repair
Seals, valves, pumps or hoses.
Clean up
Oil and filters so it lasts.
A full visit
What a visit can cover
- Pump output and case drain
- Relief and pressure settings
- Valves, solenoids and proportional controls
- Cylinders, seals and rods
- Accumulator precharge
- Oil condition, filters, breathers and coolers
- Hoses and fittings
- Air regulators, filters, dryers and valves
On the van
- Hydraulic gauges and test fittings
- Flow and temperature checks
- Common seals, hoses and fittings
- Accumulator charging kit
- Air leak detection tools
Example service call
Power unit overheating on a molding press
The call
A plant in Fond du Lac County had a press whose hydraulic oil hit alarm temperature by the end of every shift.
What we did
- Phone. We asked about the cooler and water supply. The cooler hadn’t been serviced.
- On site. The cooler was fouled, and the relief valve was set lower than spec, so it dumped flow and made heat.
- Fix. Cleaned the cooler, reset the relief, changed filters and checked the oil.
- Check. Oil held normal temperature through a full shift.
The result. No more overheating alarms.
A typical call, written to show how we work. It isn’t a specific customer.
Talk to a Wisconsin tech
Same problem on your floor?
Call and a tech will tell you what we’d check first, then the closest team heads your way.
- You talk to a tech, not a call center
- The closest Wisconsin team takes the job
- Straight answer on repair, rebuild or replace
Brands
Hydraulics and pneumatics we work on
Linked brands have their own page. See every brand we service.
- Parker
- Vickers (Eaton)
- Rexroth
- Sun Hydraulics
- Daikin
- Yuken
- Denison
- Continental Hydraulics
- Enerpac
- SMC
- Festo
- Norgren
- Bimba
- Hydac
- Danfoss
From the field
Hydraulic and pneumatic: tips from our techs
Change filters on schedule
And check the bypass indicator.
Keep water out
Use desiccant breathers in humid areas and check for water in oil.
Fix leaks early
Small leaks pull in dirt and get bigger.
Yes, pumps, valves, coolers, filters and tanks.
We repair seals on site and arrange rebuilds when needed.
Parker, Vickers (Eaton), Rexroth, Sun, Daikin, Yuken, Denison, Continental, Enerpac, SMC, Festo, Norgren and others.
Yes, leaks, pressure, dryers and valves.
Yes, press brakes, presses, molding machines and more.
We check oil condition and can arrange lab analysis when needed.
Who comes out
Wisconsin teams for hydraulic and pneumatic
The founding team closest to your shop takes the call. Central and western Wisconsin calls go to whichever team is nearest.
Milwaukee
Southeast Wisconsin. Hydraulic and pneumatic calls in Milwaukee, Waukesha, New Berlin, Menomonee Falls, Germantown, West Allis and nearby towns.
Madison
South central Wisconsin. Hydraulic and pneumatic calls in Madison, Sun Prairie, Middleton, Janesville, Beloit, Watertown and nearby towns.
Green Bay
Northeast Wisconsin and the Fox Valley. Hydraulic and pneumatic calls in Green Bay, De Pere, Appleton, Neenah and Menasha, Oshkosh, Fond du Lac and nearby towns.
Keep reading
Related repair
Machine down?
Get your hydraulic and pneumatic sorted
Call and talk to a tech about the machine, the control and the symptom. The Wisconsin team closest to you takes it from there.
