Maintenance
Safety, Operation and Maintenance Manual - Aug 2012
5-21
SY115C9/135C/155H Crawler Hydraulic Excavator
to ensure the safety of the hydraulic sys-
tem.
●
Run the engine at idle speed for 7-10
minutes before increasing its rpm to
1000 - 1200. Never operate your exca-
vator except running the engine unload-
ed for 30-40 minutes or longer in order
to heat the hydraulic oil to a tempera-
ture above 20°C.
●
Now your machine can be used for
normal construction operation after the
hydraulic oil temperature rises above
20°C. However, the heating time shall
be adjusted according to ambient tem-
perature. In normal construction work,
the joystick controls and pedals shall be
maneuvered slowly while paying close
attention to the system's running condi-
tion. Operating your machine with the
hydraulic oil temperature being below
20°C could damage the hydraulic ele-
ments.
●
Anti-friction hydraulic oil L-HM46 is
widely used in temperate zones.
●
Low-temperature, anti-friction hydraulic
oil L-HV32, whose pour point is -42°C,
is used in extremely cold regions (below
-30°C) such as Russia and Northeast
China.
●
Anti-friction hydraulic oil L-HM68 is gen-
erally used in torrid regions such as the
Middle East and India.
●
Select proper hydraulic oil according to
the region where your machine is to be
operated. The machine has been filled
with hydraulic oil of suitable brand and
type before it is delivered. User is re-
sponsible to change the oil after the ma-
chine is delivered. You may consult our
after-sale service personnel to obtain
correct brand and type of the hydraulic
oil.