Doosan DA40 - Operation in extreme conditions

SHOP MANUAL
GENERAL INSTRUCTIONS
Ch 0 page 22
Operation in extreme conditions
Operation In Extreme Cold
In extremely cold weather, avoid sudden travel movements and stay
away from even slight slopes. The machine could slide down the slope.
Snow accumulation could hide potential hazards and slippery surfaces.
Warming up the engine for a short period may be necessary to avoid
operating with sluggish or reduced working capacity. The jolting shocks
and impact loads caused by bumping or bottoming boom or attachment
could cause severe stress in very cold temperatures. Reducing work
cycle rate and workload may be necessary.
If machine is to be operated in extremely cold weather
temperatures, certain precautions must be taken. The following
checks should be made before operating the machine:
1. Check cooling system for correct mixture of antifreeze solution for
lowest expected temperature. Carefully inspect cooling system and
repair as necessary.
2. Keep batteries fully charged to prevent freezing. If distilled water is
added to batteries, run engine at least one hour to mix electrolyte
solution.
3. Keep engine in good mechanical condition for easy starting and
good performance during adverse weather.
4. Use engine oil with proper specifications for expected temperatures.
Refer to Operation and Maintenance Manual.
5. Always keep fuel tank full. Drain condensation from tank before and
after operation. Drain and service fuel filter. To eliminate clogging of
fuel filters because of wax crystal formation in fuel, be sure that fuel
used has a cloud point specification below lowest expected tem-
perature.
6. Lubricate entire machine according to Operation and Maintenance
Manual and/or the lubrication chart on machine.
7. Start engine and allow it to reach normal operating temperature
before operating.
• If mud and ice collects and freezes on any of moving parts while
machine is idle, apply heat to thaw frozen material before attempting
to operate machine.
• Operate hydraulic units with care until they have reached a temper-
ture which enable them to operate normally.
• Check all machine controls, pedals and functions to be sure they are
operating correctly before operating.
8. An extra outer air filter must be kept in operator's cabin to replace
existing element that could become iced and cause restricted airflow
to engine.
9. Clean off all mud, snow and ice to prevent freezing. Cover machine
with a tarp if possible and keep ends of tarp from freezing to ground.