Page 19
ALWAYS USE ADEQUATE EQUIPMENT SUPPORTS AND BLOCKING
Do no t a llow wei ght or equipment l oads t o rem ain suspended. Lower e verything t o t he ground bef ore
leaving the operator’s seat. Do not use hollow, cracked or unsteady, wobbling weight supports. Do not work
under any equipment supported solely by a lift jack.
DO NOT WORK ON HOT ENGINES OR HOT COOLING OR HYDRAULIC SYSTEMS
Wait for the engine to cool off after normal operation. Park the excavator on a firm, level surface and lower
all equipment before shutting down and switching off controls. When engine lube oil, gearbox lubricant or
other fluids require change, wait for fluid temperatures to decrease to a moderate level before removing
drain plugs.
NOTE:
Oil will drain more quickly and completely if it is warm. Do not drain fluids at 95
°
C (203
°
F)
temperatures but don’t allow full cool-down.
COOL-DOWN IS REQUIRED PRIOR TO
RADIATOR OR RESERVOIR CHECKS
Stop the engine an d a llow h eat to d issipate
before performing service on the engine radiator
or h ydraulic fluid res ervoir. B oth a ssemblies
have ai r v ent levers at or near t he f ill c ap for
venting built-up air pressure. Release the levers
before trying to t ake of f fill c aps and LO OSEN
CAPS SLOWLY, prior to removal.
PRESSURIZED HYDRAULIC OIL FLUID
LEAKS CAN BE DANGEROUS
Fluid leaks from hydraulic hoses or pressurized
components can be di
fficult to s ee b ut
pressurized oi l ha s en ough force t o pi erce t he
skin and cause serious injury.
Always use a pi ece of wood or cardboard to
check for suspected hydraulic leaks. Never use
your hands or expose your fingers.
HAOA060L
Figure 19
HAOA420L
Figure 20
