Case 2050M, Руководство оператора, Страница: 109 / 286

4 - OPERATING INSTRUCTIONS
Cold temperature operation
Operating in cold climate conditions
Cold weather conditions require special operating procedures. The machine will require special start up, warm up,
and maintenance procedures for the best performance. Proper cold weather maintenance will extend the service life
of the machine.
Batteries
Clean the batteries and make sure they are at full charge. In cold conditions, it is important to run the machine long
enough to return the charge lost by starting. In most cold conditions, run the machine for about
10 min . In extreme
cold conditions, run the machine for 30 min .
NOTE: A fully charged battery at -17 °C ( 1.4 °F ) has only 40 % of the normal starting power. At -29 °C ( -20.2 °F ) the
battery has only 18 % .
Inspect the battery cables and terminals. Clean the terminals, and apply electrical terminal sealers to prevent corro-
sion. See your authorized dealer.
If you add water to the batteries and the temperature is below 0 °C ( 32.0 °F ), charge the batteries or run the engine
for approximately 2 h . This will prevent battery freezing.
Lubricants
Follow the recommended oil and filter service for the engine and hydraulic system. Use the correct viscosity oil in each
component for the ambient temperature. For extreme cold conditions, contact your authorized dealer for alternative
lubricants for the hydraulic and transmission systems.
Fuel
Check with your fuel supplier for the correct cold weather fuel. Wax particles in the fuel filters will reduce engine
power. Some cold weather fuel blends result in lower engine power.
Check for water in the fuel system. Cold temperatures can cause condensation to form in the fuel tank. Check and
drain the fuel prefilter and fuel tank for water as required.
Diesel Exhaust Fluid (DEF)
During cold weather conditions, it is normal for the DEF to freeze inside the tank. Your machine is equipped with an
internal tank heater to thaw frozen DEF. Your machine will still function until the DEF begins to flow. The Selective
Catalytic Reduction (SCR) system will return to normal function once the DEF begins to flow. The DEF level gauge
may not display an accurate level until the tank thaws completely.
NOTE: Do not use an anti-gelling or freeze point improver in your DEF. The 32.5 % solution is specifically designed
to provide the optimum NO
X
reduction properties. Any further blending or adjusting of the DEF mixture will lessen its
ability to perform correctly and may cause damage to the SCR components.
Cooling system
Check the coolant mixture before operating in cold temperatures. A mixture of 50 % ethylene glycol or 50 % OAT
coolant and 50 % water must be used. This mixture is used if the lowest ambient temperature is -37 °C ( -35 °F ). If
the ambient temperature is lower, adjust the mixture. Use ethylene glycol or OAT coolant and water in the machine
during all seasons. Depending on the date of manufacture, the machine could have either coolant type. Machines
with OAT coolant will have a decal near the fill location. Never mix conventional coolant with OAT coolant. See page
7-22 for instructions on switching coolant types.
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