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SECTION 5
MAINTENANCE
Page 14
OM515C520C99/1E
DRESSTA
5.5. SEASONAL PREPARATION
GENERAL
Mechanical efficiency is enhanced during seasonal air temperature changes, when these
instructions are followed.
OPERATION IN SUB-ZERO WEATHER.
Wheel loaders left outside for prolonged periods in sub-zero weather will suffer from "cold-soak."
Lubricants become viscous and incapable of lubricating the moving parts. Extreme wear could
result to the engine, transmission and final drives unless proper precautions are taken. A source of
outside heat is necessary under these conditions. There are electric as well as propane-fired
engine coolant heaters available. Gas-fired forced air heaters may also be obtained to heat the
transmission and final drives.
WARNING! For your personal safety, use caution and follow the manufacturer's
instructions when using external heaters.
5.5.1. FUEL SYSTEM
Recommendations referring diesel fuels which give the most satisfactory performance of the
engine are listed in paragraph 5.4.6.
5.5.2. COOLING SYSTEM
Prepare the cooling system as follows:
1. Check the entire engine system for leaks.
2. Inspect the condition of all hoses and replace the hoses and hose clamps as necessary.
3. Clean the cooling system.
4. Check the drive belts tension and replace a worn belt.
5. Remove all debris from the radiator core using air or water under pressure. Direct the flow
through the core, opposite the normal direction of air flow.
WARNING! For your personal protection, water pressure should not exceed
270 [kPa] and air pressure should not exceed 210 [kPa]. Use safety goggles.
6. Clean the radiator guard and the outside of the core.
7. Protect your cooling system from damage by using approved antifreeze (based on ethylene
glycol) and coolant.
8. Keep your cooling system clean and minimize corrosion by changing the coolant filter at the
correct intervals. Refer to Section 5.8.6.
5.5.3. ELECTRICAL SYSTEM
Clean batteries and remove all corrosion from the battery terminals and cables. Repair or replace
all wires which have worn, cracked or frayed insulation and broken or loose wires. Service the
batteries.
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