Doosan DL200, Operation And Maintenance Manual

Page: 52 / 256

OP000506 Safety
1-40
Cool Down Is Required Before Radiator
or Reservoir Checks
Shut down engine and allow heat to dissipate before
performing service on engine radiator or hydraulic fluid
reservoir. Both assemblies have air vent levers at or near fill
cap for venting built-up air pressure. Release levers before
trying to take off fill caps and LOOSEN CAPS SLOWLY,
before removal.
Precautions with High-pressure Line,
Tubes and Hoses
When inspecting or replacing high-pressure piping or hoses,
check that the pressure has been released from the circuit.
Failure to release the pressure may lead to serious injury.
Always do the following:
• Wear protective glasses and leather gloves.
• Fluid leaks from hydraulic hoses or pressurized
components can be difficult to see but pressurized
oil has enough force to pierce the skin and cause
serious injury. Always use a piece of wood or
cardboard to check for suspected hydraulic leaks.
Never use your hands or expose your fingers.
• 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 installed correctly to prevent vibration,
rubbing against other parts, and excessive heat
during operation.
– If any of the following conditions are found,
replace the part.
– Damage or leakage from hose end.
– Wear, damage, cutting of covering, or
exposure of strengthening wire layer.
– Cover portion is swollen in places.
– There is twisting or crushing at movable
parts of hose.
– Foreign material is embedded in the covering.
– Hose end is deformed.
NOTE:
Refer to “Hose In-service Lifetime Limit (European
Standard ISO 8331 and EN982 CEN)” on page 4-70,
for additional European regulations.
Figure 31
HAOA060L
X
X
HDO1045I
Figure 32