The hydraulic reservoir is mounted behind the cab on this STI service truck. It is essential for operating the telescoping crane and other hydraulic tools. 

We are in the busiest stretch of the year for many service truck owners and downtime isn’t an option. Your hydraulic system is the muscle behind every job. That’s why routine fluid changes and component inspections aren’t just good practices, they’re essential to getting peak performance out of your truck.

Why Regular Fluid Changes Matter

Hydraulic fluid isn’t just a lubricant; it’s the lifeblood of your truck’s hydraulic system. Over time, this fluid degrades. Heat, moisture, and contamination from wear particles slowly break it down, reducing its ability to protect internal components.

Here’s what happens when fluid is ignored:

• Sluggish performance: Viscosity loss leads to poor pressure control.
• Increased wear: Contaminants act like sandpaper on valves and seals.
• Overheating: Degraded fluid can’t dissipate heat, stressing the entire system.

Changing hydraulic fluid at the recommended intervals helps avoid system strain and unexpected downtime when you need your trucks the most.

A clean hydraulic filter is vital for protecting your system from contaminants that can damage valves, pumps, and other components.

Why Component Inspections Matter

Even if your fluid is fresh, worn or damaged components can still bring the system down. Hoses, seals, cylinders, and filters all have limited lifespans. A single cracked hose or leaking seal can escalate into full system failure.

Routine inspections help you catch:

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