High-pressure Lines, Tubes and Hoses When inspecting or replacing high-pressure piping or hoses, check to verify that pressure has been released from circuit. Failure to release pressure can result in death or serious injury. Release pressure as described in “Handling of Accumulator” on page 4-99. Always do the following: X Wear eye protection and leather gloves. X Fluid leaks from hydraulic hoses or pressurized components can be difficult to see but has enough force to pierce skin and can result in death or serious injury. Always use a piece of wood or cardboard to check for suspected hydraulic leaks. Never use your hands or expose your fingers. Wear safety goggles.
Do not bend high-pressure lines. Do not strike high-pressure lines. Do not install lines, tubes or hoses that are bent or damaged. Make sure that all clamps, guards and heat shields are correctly installed to prevent vibration, rubbing against other parts, and excessive heat during operation. Replace hose or components if any of the following problems are found: HDO1045I Figure 50 Damage or leakage from hose end fitting. Wear, damage, cutting of hose covering, or wire braiding is exposed on any hose. Cover portion is swollen in any section. The hose is twisted or crushed. Foreign material is embedded in hose covering. Hose end is deformed. Connection fittings are damaged or leaking. NOTE:
Refer to “Hose In-service Lifetime Limit (European Standard ISO 8331 and EN982 (CEN))” on page 4-75, for additional European regulations. High-pressure is generated inside engine fuel lines when engine is running. Before performing inspection or maintenance of fuel line system, wait for at least thirty seconds after stopping engine to let internal pressure drop and tip breather cap up to release residual pressure. Oil or fuel leaks from high-pressure hoses can cause fire or improper operation, which can result in death or serious injury. If any loose bolts are found, stop work and tighten to specified torque.
If any damaged hoses are found, stop operations immediately and contact your DOOSAN distributor for replacement parts. Safety 1-61 DX225LC-3