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Maintenance
Safety, Operation and Maintenance Manual - Aug 2012
5-57
SY115C9/135C/155H Crawler Hydraulic Excavator
tor, consult Sany distributor for replace-
ment and air elimination.
5. Eliminate air from the travel motor (only
when the oil has been discharged from the
travel motor shell)
1) Run the engine at low speed. Loosen
the air vent screw plug (4). Tighten the
screw plug if oil is seen.
2) Run the engine at low speed. Swing the
work equipment 90 degrees in order to
place it at the track side.
3) Raise the machine with the force of the
work equipment. With the track lifted
just above the ground, run the track
unloaded for two minutes. Repeat this
operation for both tracks and run the
tracks back and forth uniformly.
6. Eliminate air from attachment (if equipped)
If a breaking hammer or other attachment
has been installed, run the engine at low
idle speed and operate the attachment
control pedal repeatedly (about 10 times)
till the air is expelled from the oil path com-
pletely.
Note:
●
If manufacturer of the attachment has pro-
vided instruction on eliminating air from
the attachment, the instruction shall be fol-
lowed to eliminate the air.
●
Turn off the engine after air elimination.
Wait
fi
ve minutes before operation in order
to eliminate the bubbles in hydraulic cylin-
der.
●
Check for oil leakage and wipe off the oil
over
fl
owed.
●
Check the oil level after purging the air.
Add oil if the oil level is low.
CZ335-1104040
Fig. 5-49
Fig. 5-50
4
CZ135B-1104013