Maintenance
Safety, Operation and Maintenance Manual - Aug 2012
5-7
SY115C9/135C/155H Crawler Hydraulic Excavator
free place in order to prevent dust from
getting into the oil.
●
Clean the air
fi
lter cartridge immediately if
the
fi
lter's alarm indicates clogging.
●
Clean the fins and other heat exchanger
parts frequently to avoid them being
clogged.
●
Clean and replace the fuel
fi
lter frequently.
●
Clean the electrical components, espe-
cially the start motor and the alternator, to
prevent dust from building up on them.
Lubricants of different brands
Never mix lubricants of different brands and/or
grades together. If you need to use the lubri-
cant of another brand or grade, drain the old
lubricant completely and replace with the new
brand.
Securing access cover
When servicing the machine with the access
covers open, use a locking lever to secure the
cover to certain position. Otherwise, the cover
can be swung close by wind and cause bodily
injury.
Purging air from hydraulic system
When any hydraulic units have been repaired
or replaced or any hydraulic lines have been
removed or installed, always bleed the air from
the system. For more information see "Air in
hydraulic system - purge."
Connecting hydraulic hoses
●
In removal of parts with O-rings or gaskets,
clean the installation surfaces and replace
with new parts. Remember to install the O-
rings or gaskets.
●
Never twist or bend the hydraulic hoses
when assembling. Failure to do so could
cause damage to the hoses and consider-
ably reduce their service life.