Hydraulic Troubleshooting & Repairin Northwest Indiana

What does SSI do for hydraulic systems?

We troubleshoot and repair industrial hydraulic systems: pumps, power units, valves, cylinders, hoses and fittings. We also deal with the contamination and heat that wear them out. Our crews work on presses, mill equipment and process machinery in the field. Our Portage machine shop makes the parts that aren’t on a shelf.

Hydraulics are unforgiving. A small leak, a little dirt or a relief valve set wrong can stop a press for a shift. Good troubleshooting finds the actual fault, so you replace one part instead of three.

How do you troubleshoot a hydraulic system?

We troubleshoot by testing, not guessing. Pressure and flow readings at the pump, the valves and the actuator tell us where the energy is going. That splits the system into sections and points to the component at fault before anything gets pulled.

Symptom	Where we look first
Slow or weak movement	Pump output, relief setting, internal bypass
Pressure won’t build	Relief valve, pump wear, suction problems
Hot oil	Internal leakage, cooler, fluid level
Noisy pump	Cavitation, aeration, suction strainer, wear
Cylinder drift	Piston seals, counterbalance or check valves
Erratic motion	Air in the system, sticking valves, contamination

Safety comes first on every hydraulic job. Stored pressure and suspended loads can hurt people. Before anything is opened, we lock out the machine and block or lower loads. Then we bleed off pressure. Every job starts with a JHA.

Pumps, valves and cylinders

Pumps and power units

We diagnose worn pumps, replace or rebuild them, and service the reservoir, cooler and suction side. Our equipment rebuild crews handle the drive motor and coupling, and we laser-align the pump to the motor on reinstall.

Valves and manifolds

Sticking directional valves and drifting relief settings cause a lot of erratic behavior. We clean, replace and reset valves to the OEM setting or your plant standard. Then we check that the machine cycles the way it should.

Cylinders

We reseal cylinders, repair rods and glands, and replace damaged parts. When a rod is scored or a gland is out of production, our machine shop can make the part.

How do you stop the same failure from coming back?

Most repeat hydraulic failures trace back to contamination, heat or a mechanical cause outside the hydraulics. After a repair, we look at those causes too:

• Contamination. Filter condition, breathers, and flushing after a pump or cylinder failure.
• Heat. Cooler performance, fluid level and internal leakage.
• Hoses and lines. Routing, clamping and chafe points that cause repeat leaks.
• Mechanical load. Misalignment, worn guides or binding that make the hydraulics work harder.

Should you repair or replace a hydraulic component?

Repair usually makes sense when the housing, barrel or body is sound and the wear is in seals, rods or internal parts. Replacement makes sense when the part is cracked, badly scored or no longer worth the labor. We’ll tell you which one, and why, before any work starts.

Repair usually wins when	Replace usually wins when
Barrel and body are in good shape	Barrel is scored or out of round
Replacement lead time is long	A matching new unit is on the shelf
Parts can be made in our shop	Repeated rebuilds keep failing

Hydraulic presses and refractory plants

Refractory brick presses are some of the hardest-working hydraulic machines in the Region. We service all makes and models of refractory presses and their supporting handling and feed systems. See our refractory press repair page and the refractory industry page for the full scope.

We also support steel mills, paper mills and process plants across Northwest Indiana and Chicagoland. If a machine is down now, our emergency repair crews answer 24/7. Done right the first time.