5-48
MAINTENANCE
EVERY 1000 HOURS
REPLACING THE HYDRAULIC OIL
RETURN FILTER
Refer to “Replacing the hydraulic oil return
filter” on page 5-34.
EVERY 1000 HOURS
REPLACING THE PILOT LINE FILTER
Refer to “Replacing the pilot line filter” on
page 5-35.
REPLACING THE TRAVEL MOTOR GEAR
OIL
Refer to “Replacing the travel motor gear oil”
on page 5-36.
CLEANING THE ENGINE COOLING
SYSTEM
Warning
•Stoptheengineandallowthemachine
to cool down before performing
maintenance.
· The engine, muffler, radiator and many
other parts of the machine are hot
immediately after the engine is
stopped. Touching these parts will
cause burns.
· The engine coolant is also hot and
under high pressure immediately after
the engine is stopped. Be careful
when loosening the caps or plugs.
Working on the machine under these
conditions could result in burns or
injuries due to the hot coolant spurting
out.
•Ifmaintenancemustbeperformedwith
the engine running, always work as a
two person team communicating each
other.
· One person must sit in the operator’s
seat so that he/she can immediately
stop the engine when necessary. He/
she must take care not to touch the
lever or pedal unless necessary.
· The one who performs maintenance
must make sure to keep his/her body
or clothing away from the moving part
of the machine.
•Standingatthebackofthemachine
while the engine is running is extremely
dangerous, as the machine could move
suddenly. Never stand at the back of the
machine while the engine is running.
•Donotremovetheradiatorcaporthe
drain plug when the cooling water is
hot. Stop the engine and wait until the
engine and the cooling water cool.
Then, slowly loosen the radiator cap
and the drain plug to remove them.
When cleaning, if the temperature of the
coolant is low, the thermostat will be closed
and the coolant will not circulate in the
radiator.Heatthecoolantwatertoatleast
90°C (194°F) before cleaning.
1. Open the engine hood and the side cover.
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