2-29. OPERATE IN EXTREME COLD (Cont).
(7) Stow extension cord in compartment under drivers seat.
(8) Start engine (see paragraph 2-11).
2-30. OPERATE IN EXTREME HEAT.
When operating under desert conditions, also refer to paragraph 2-33.
a. General Guidelines.
(1) Preventive maintenance is critical when operating at high temperatures. Forklift truck systems must be kept
cool, clean, and in good condition.
(2) Check engine oil level (see paragraph 3-6), transmission oil level (see paragraph 3-7), and coolant level (see
paragraph 3-8) frequently. Fluids evaporate or break down more quickly and seals are more likely to leak
under extreme heat.
(3) Use correct fluids and lubricating oils for high temperature (see LO 10- 3930-659-12). Ensure that only an
antifreeze and potable water mixture is used in cooling systems.
(4) Do not overfill when adding fluids. Find and use fill marks. Try to service fluids when outside temperature is at
midpoint of temperature range for the day. This helps avoid fluid overflows, explosions, or low levels due to
expansion and contraction during hottest part of day or coolest part or night.
(5) Keep radiator clean and free of dirt or debris. Ensure that radiator fill cap is the correct pressure for the forklift
truck and that it works correctly.
(6) Keep transmission oil cooler screen free of dirt and debris.
(7) Check often for any wetness or signs of leaks at cooling system lines, hoses, seals, seams, drain plugs, or
hose connections. Ensure that hoses are not spongy or brittle, and check fan belts for cracks or breaks.
(8) High temperatures can expand belts; have belts adjusted as necessary.
(9) In hot climates with relatively high dew levels and high humidity, overnight condensation can affect fuel tank,
fuel lines, and hydraulic system reservoir. Have Unit Maintenance drain fuel filter at least once weekly, and
check hydraulic oil level sight gage for foamy oil appearance both morning and night.
(10) Heat and sun cause more rapid deterioration of rubber, plastics, and other materials. Check tires more
frequently for damage or wear. Visually check tires for proper inflation and have Unit Maintenance add air
when tires are cold and at midpoint of temperature range for the day.