Komatsu 830E Shop Manual page 49

A warning plate is mounted on top of the radiator
surge tank cover near the radiator cap.The engine
cooling system is pressurized. Always turn the
engine off and allow the engine to cool before
removing radiator cap. Unless the pressure is first
released, removing the radiator cap after the engine
has been running for a time will result in the hot cool-
ant being expelled from the radiator. Serious scald-
ing and burning can result.
Warning plates are mounted on the frame in front of,
and to the rear, of the front tires. All personnel are
warned that the clearances change when the truck is
steered and could cause serious injury.
Warning plates are attached to both the hydraulic
tank and fuel tank to alert technicians not to work on
the truck with the body in the raised position
unless body-up retention device (pins or cable) is in
position.
A plate on the side of the hydraulic tank furnishes
instructions for filling the hydraulic tank.
Keep the system open to the atmosphere only as
long as absolutely necessary to lessen chances of
system contamination. Service the tank with clean
Type C-4 hydraulic oil. All oil being put into the
hydraulic tank should be filtered through 3 micron fil-
ters.
A04046 Warnings and Cautions A4-3