Komatsu HD325-8, Operation & Maintenance Manual

Page: 322 / 464

When the ambient temperature drops, the capacity of the battery will also drop. Maintain the battery charging
rate as close as possible to 100%. Insulate it against cold temperature to ensure that the machine can be
started easily in the next morning.
REMARK
Measure the gravity of the electrolyte and calculate the charging rate from the following conversion table.
Electrolyte Temper-
ature
Charging Rate (%)
20 °C 0 °C –10 °C –20 °C
100 1.28 1.29 1.30 1.31
90 1.26 1.27 1.28 1.29
80 1.24 1.25 1.26 1.27
75 1.23 1.24 1.25 1.26
• When the ambient temperature is low, the capacity of the battery considerably drops. Cover it, or remove it
from the machine to place it in the warm place. Restore it again before the operation.
• If the electrolyte level is low, add distilled water in the morning before beginning the work. Do not add water
after the day's work to prevent diluted electrolyte in the battery from freezing during the night.
RADIATOR CURTAIN
(if equipped)
Install the radiator curtain if he ambient temperature is low and the display of the engine coolant temperature
gauge hardly reaches to the white range.
You can adjust the opening of the radiator curtain like closing it fully, or opening one window or both windows.
Adjust the radiator curtain to be opened appropriately so that the display of the engine coolant temperature
gauge is within the white range.
PRECAUTIONS AFTER DAILY WORK COMPLETION IN COLD WEATHER
The machine may get stuck and does not move due to mud and water which become frozen around the under-
carriage of the machine. Observe the following in order to prevent the machine from being frozen.
• Remove all the mud and water from the machine body. In particular, wipe the hydraulic cylinder rods clean
to prevent the seal from being damaged by mud or dirt together with drops of water on the rod which en-
tered inside the seal.
• Place the machine on a firm, dry ground.
If there is no firm and dry ground, park the machine on boards.
This prevents the undercarriage from freezing to the ground surface, and allows the machine to be started
easily the next morning.
• Open the drain valve at the bottom of the fuel tank to drain the water accumulated in the fuel system and
prevent it from freezing.
• Add DEF to the specified level.
If adding more than the defined level, it may expand to break the devices in the tank when it freezes.
If DEF tank level is lower than the defined level for the cold weather, DEF may freeze easily to damage the
parts in DEF system.
If the filler cap freezes, defreeze and open.
• The battery function decreases remarkably at low temperature.
Cover it, or remove it from the machine to place it in the warm place. Restore it again before the operation.
• If the electrolyte level is low, add the distilled water in the morning before beginning the work.
Do not add the distilled water after the day's work to prevent the battery electrolyte from freezing during the
night.
AFTER COLD WEATHER SEASON
When the season changes and the weather becomes warmer, do as follows.
COLD WEATHER OPERATION OPERATION
3-262