OPERATION UNDER UNUSUAL CONDITIONS - CONTINUED
OPERATE IN EXTREME HEAT
Operating during periods of extreme heat [ambient temperatures above 100F (38C)] can cause engine
and hydraulic systems to overheat. Engine temperatures above 230F (110C) and hydraulic oil
temperatures above 250F (121C) can cause damage to engine and hydraulic system components.
Check engine coolant temperature warning light and hydraulic oil temperature warning light often
during periods of extreme heat to prevent damage to engine and hydraulic system.
Gaskets and seals are more likely to leak when engine and hydraulic system operating temperatures are
high. Check engine and hydraulic oil levels more often during periods of extreme heat to prevent dam-
age to engine and hydraulic system components. Check for leaks around gaskets, seals and fittings more
Check engine oil level (WP 0014 00) and monitor engine coolant temperature warning light.
Check hydraulic oil level (WP 0018 00) and monitor hydraulic oil temperature warning light.
Check cooling system often:
If engine coolant temperature or hydraulic oil temperature warning lights illuminate, stop roller and allow engine
to run at idle for a few minutes to cool down.
When warning lights have gone out, resume operation as necessary.
Clean and lubricate roller with correct grade of lubricants to help prevent deterioration. Have Field Maintenance change
air, fuel, transmission and hydraulic filter elements at shorter than normal intervals, as designated in Field Maintenance
Do not fill fuel tank completely. Extreme heat causes fuel to expand and overflow.
Ensure that water is as free as possible of mineral deposits before adding coolant mixture to radiator. Local desert water
sources have high mineral deposits that will clog radiator.
Ensure that water/antifreeze mixture is 50/50. This mixture raises coolant boiling point to help prevent overheating.
High temperatures can damage hoses. Check radiator, fuel and lubricant hoses for leaks around fittings. Notify supervi-
sor if hoses are damaged.
Park roller under cover or in the shade, if possible.
OPERATE IN SANDY OR DUSTY CONDITIONS
The roller normally operates in dusty conditions and PMCS instructions are designed to handle these condi-
tions. However, in deserts, dust conditions are more extreme and certain checks and services are required
more often than normal.
Check engine coolant temperature and engine oil pressure frequently.
Check air restriction indicator more often to ensure air cleaner is not becoming clogged.
Keep radiator core free of dust, leaves, and any other obstructions to air circulation.