SANY SY155U, Operation And Maintenance Manual, Page: 103 / 192

MACHINE OPERATION
4-35 SY155U Excavator OMM
Cold Weather Operation
Operation in Cold Weather
When operating the machine in low temperatures, the
engine may be difficult to start, the fuel line may freeze,
and oil may become more viscous. Select fuels and
lubricants according to the air temperature.
Engine Coolant in Cold Weather
See “Recommended Lubricants, Fuel, and Engine
Coolant” on page 5-8.
Battery in Cold Weather
WARNING
Before proceeding with any battery maintenance
procedure, observe the following precautions:
• The top of the battery must be kept clean to
prevent plugging of the battery vents. Regularly
wash the top of the battery to prevent the battery
vents from plugging.
• Battery gases are explosive. Never smoke
around batteries or expose them to sparks or
open flames. Work in a well-ventilated area.
• Wear personal protective equipment (PPE) when
working with batteries.
• Battery acid can cause burns or injury. If battery
acid makes contact with your skin or eyes, flush
the area immediately with fresh water and seek
medical attention.
Failure to follow this warning could result in death
or serious injury.
In cold climates, battery efficiency will decline.
Electrolytes can freeze if the battery charge is low. Keep
the battery charged near 100% and in a warm area if
possible.
Track Cleaning in Cold Weather
When the temperature is below 32°F (0°C) and mud is
built up on the tracks, swing the upper structure 90° and
raise the machine so that one track is off the ground.
Rotate the track forward and backward to remove the
mud from the sprocket, track rollers, and idlers.
After the Cold Season
• Replace the fuel and engine oil with fuel and oil of the
specified viscosity.
If permanent ethylene glycol engine coolant was not
used and ethanol engine coolant is used as an
alternative, drain and flush the cooling system
completely. Add new ethylene glycol engine coolant to
the cooling system.
Machine Storage in Cold Weather
• Clean the machine.
• Check the engine coolant and engine oil levels, and
check for leaks. The machine is normally filled to
withstand a maximum low temperature of -40°F
(-40°C). Change the fuel, hydraulic oil, and gear oil with
new fluids that meet the air temperature requirements
as necessary.
• Check the hydraulic motors, hydraulic cylinders,
pumps, circuits, and swivels for leaks. Check all
cylinder rods for scratches and corrosion. Apply grease
to exposed cylinder rods.
• Remove and charge the battery. When the battery is
fully charged, store it indoors.
• Clean the battery terminals as necessary. Apply a coat
of dielectric grease to the terminals.
• Start and run the machine on a monthly basis.
After Daily Operation
WARNING
Rotating tracks are dangerous. Stay away from
rotating tracks. Failure to follow this warning
could result in death or serious injury.
NOTICE!
Fill the fuel tank to its maximum level after
operation to prevent moisture in the fuel tank from
condensing at low temperatures, which could
result in fuel-line freeze.
NOTE: For machines on muddy job sites, it is
recommended that the operator clean the mud
from the tracks and rollers after each shift. After
each shift, it is recommended that the operator
drain the water from the water separator.
Mud and water accumulation on the undercarriage can
affect normal operation of the machine. Make sure to
perform the following actions after daily operation:
• Remove mud and water from the machine. Mud,
dirt, and water can damage the seals.
• Park the machine on a firm, dry surface.
• If possible, park the machine on boards, which can
prevent the tracks from sinking into soft ground.
Normal operation can fail if the machine becomes
stuck.
• Open the drain valve of the fuel water separator
daily and discharge the water in the fuel system.