If you've spent any time around heavy equipment, you already know hydraulic systems don't usually fail without warning. Most of the time, the machine has been trying to tell you something for weeks, sometimes even months.

A slow boom, a noisy pump, oil showing up where it shouldn't, or cylinders that don't hold their position are all signs that something isn't right. Catching those problems early can be the difference between replacing a hose and rebuilding an entire hydraulic system.

At EMSCO, we see hydraulic issues on all makes and models of construction equipment. While every machine is different, the causes of hydraulic failure are usually the same, and most of them are preventable.

Keep Your Hydraulic Oil Clean

Contamination is the number one cause of hydraulic component failure.

Dust, dirt, water, and even tiny metal particles can circulate through the system and slowly damage pumps, valves, motors, and cylinders. These contaminants are often too small to see, but they can cause thousands of dollars in repairs.

A few simple habits make a big difference:

• Change hydraulic filters at the recommended service intervals.
• Always use clean containers when topping up oil.
• Keep filler caps and breathers clean.
• Repair damaged seals before contamination enters the system.
• Store hydraulic oil properly to prevent moisture from getting inside.

Using quality hydraulic filters and OEM replacement parts also helps protect expensive components. Check out our Parts Department Inventory

 

Don't Ignore Small Leaks

A leaking hose or fitting might not seem urgent, especially if you just keep adding oil.

The problem is that every leak allows contaminants into the system while reducing operating pressure. Over time, that small leak puts additional strain on pumps and other hydraulic components.

Watch for:

• Oil around hose fittings
• Wet cylinders
• Drips underneath the machine
• Oil collecting around pumps or control valves

Replacing a hose today is significantly less expensive than replacing a hydraulic pump tomorrow.

 

Watch for Changes in Machine Performance

Operators are usually the first to notice when something changes.

If the machine suddenly feels slower, weaker, or less responsive, there's usually a reason.

Common warning signs include:

• Slow boom or bucket movement
• Weak lifting performance
• Jerky hydraulic functions
• Excessive heat
• Whining or unusual pump noise
• Hydraulic functions that drift while holding a load

Don't assume these symptoms will go away on their own.

Early diagnosis often prevents secondary damage throughout the hydraulic system.

If your equipment is showing any of these symptoms, our Service Department can inspect and diagnose hydraulic issues before they become major repairs.

Keep Hydraulic Oil at the Correct Level

Running low on hydraulic oil creates more problems than many people realize.

Low oil levels allow air into the system, leading to cavitation—a condition that damages pumps and reduces system performance.

Make hydraulic oil inspections part of your daily walk-around.

Check for:

• Proper oil level
• Oil condition
• Milky oil (water contamination)
• Burnt smell
• Foaming

If the oil looks contaminated, replacing it before damage occurs can save a significant repair bill.

Replace Worn Hoses Before They Burst

Hydraulic hoses have a service life.

Heat, vibration, UV exposure, and constant flexing eventually weaken the hose, even if it still looks functional.

Inspect hoses regularly for:

• Cracks
• Bulges
• Abrasion
• Exposed wire braid
• Loose fittings
• Oil seepage

Waiting for a hose to burst usually means unexpected downtime and often a very expensive cleanup.

Replacing worn hoses during scheduled maintenance keeps your equipment working when you need it most.

Don't Overlook Preventative Maintenance

Scheduled maintenance isn't just about changing fluids.

Routine inspections often catch problems before operators notice them.

During preventative maintenance, technicians can identify:

• Loose fittings
• Hose wear
• Cylinder seal failures
• Contaminated oil
• Pump performance issues
• Excessive operating temperatures

Finding these issues early keeps repair costs predictable and helps maximize component life.

Use the Right Hydraulic Oil

Not all hydraulic oils are created equal.

Using the wrong viscosity or mixing different oil types can affect lubrication, operating temperatures, and overall system performance.

Always follow the equipment manufacturer's recommendations and avoid mixing incompatible hydraulic fluids unless specifically approved.

If you're unsure which oil your machine requires, ask before filling the tank.

Our Parts Team can help you source the correct hydraulic oil, filters, seals, and replacement components for your equipment.

Know When to Call a Technician

Some hydraulic problems can be identified during daily inspections, but diagnosing the root cause often requires specialized tools and experience.

Professional hydraulic diagnostics can identify:

• Pump efficiency problems
• Internal cylinder bypass
• Valve issues
• Pressure losses
• Flow restrictions
• System contamination

Addressing these problems early usually costs far less than waiting for a complete hydraulic failure.

 

Keep Your Equipment Working, Not Waiting

Hydraulic systems are one of the hardest-working parts of any piece of heavy equipment. With regular inspections, clean oil, quality replacement parts, and preventative maintenance, you can significantly reduce the risk of costly downtime.

If your machine is showing signs of hydraulic trouble—or you're simply due for preventative maintenance—the experienced technicians at EMSCO are here to help. From hydraulic diagnostics and repairs to quality replacement parts, we support equipment owners across Saskatchewan and beyond, helping keep machines productive and jobs moving forward.

Book Your Service Here

1-833-443-6726