🔍 Key Concepts

• Proper procedure for tightening hydraulic flare fittings (supporting the fitting body to avoid twisting the tubing) • Safety precautions with hydraulic systems (pressure, moving machinery, fluid injection risk) • When to shut down or isolate a hydraulic system before maintenance

💭 Think About

• What can happen to thin-wall hydraulic tubing if you apply torque to the nut without supporting the fitting body? • Is it safe to work on a leaking high-pressure hydraulic connector while the system is pressurized or in motion? Why or why not? • Among the choices, which method both protects the tubing/fitting from damage and reduces the risk of injury from hydraulic pressure?

✅ Before You Answer

• Verify whether hydraulic maintenance should normally be done with the system running or shut down/isolated • Consider the purpose of using two wrenches on tubing fittings (one to hold, one to turn) • Check if complete replacement of tubing and fittings is usually the first step for a slight leak, or if tightening with proper technique is standard practice