Operation in Extreme Heat - TM-10-3930-624-120043

periods of time. When practical, park the truck under

(2) Operate the hydraulic units with care until the

cover to protect it from sun, sand, and dust.

units have reached a temperature to enable them to

operate normally.

(2) Cover the truck with a tarpaulin if suitable

shelter is not available. Protect the engine compartment

(3) Check all truck operations to be sure all

from sand accumulation.

components are in operating condition.

(3) In hot, damp climates, corrosive action will

g. Parking.

occur on all parts of the truck and will be accelerated

(1) Park the truck on high ground if possible.

during the rainy season. Rust and paint blisters will

Prepare a footing of planks or brush if necessary to keep

appear on metal surfaces and fungus growth on other

the wheels from freezing to the ground. Chock the

surfaces.

wheels and set the parking brake. Place blocks under

(4) Protect all unfinished exposed metal surfaces

the forks to prevent the forks from freezing to the

with a film of preservative. Protect cables and terminals

ground.

with ignition insulation compound.

Apply paint or

(2) Clean all mud, snow, and ice from the truck to

suitable rust preventive to damaged surfaces to protect

prevent freezing. Park the truck under cover, or cover

from rust and corrosion.

the truck with a tarpaulin if possible. Insure that the

2-12. Operation in Dusty or Sandy Areas

ends of the tarpaulin will not freeze to the ground.

a. General. Operation of the truck may cause dust

2-11. Operation in Extreme Heat

in almost any area. However, when operating in dusty

a. General. Continuous operation of the truck in

or sandy areas additional precautions must be taken.

high temperatures may cause the truck to overheat.

b. Cooling System. Keep the cooling system fins

Frequently observe the engine temperature and stop the

and cooling areas clean. Blow out with compressed air,

truck for a cooling off period whenever necessary.

if possible, whenever necessary.

b. Cooling System. Make frequent inspections of

c. Fuel System. Use care when servicing the fuel

the fan and radiator. Keep the coolant level one inch

system to prevent dust and sand from entering the tank.

from the top of the radiator; use care when opening

radiator cap. Check the radiator fins for accumulation of

d. Air System. Service the air cleaner at frequent

dust, sand, and insects which could block the cooling

intervals. Prevent dust and sand from entering engine

passages.

parts and compartment as much as possible.

(1) Formation of scale and rust in the cooling

e. Lubrication. Lubricate the truck in accordance

system occurs more rapidly in extremely high

with the current lubrication order. Lubricate and perform

temperatures. Change the antifreeze each year to keep

services at much shorter intervals than normal. Clean

the corrosion inhibitor at full strength. (Refer to TB 750-

all lubrication fittings before applying lubricant. Sand

651).

mixed with a lubricant becomes very abrasive and

(2) If necessary, flush the cooling system

increases wear on parts.

periodically to keep the passages clear. Avoid the use

f. Parking. Protect the truck as much as possible.

of water with high alkali content which increases scale

Park the truck under cover or protect with tarpaulins.

and rust formations.

2-13.

Operation Under Rainy or Humid Conditions

c. Battery. Check the level of the electrolyte daily.

Keep the electrolyte above the plates to prevent

a. General. Operation under rainy or

humid

damage to the battery. Use a slightly weaker electrolyte

conditions is similar to that in extreme heat.

solution in hot climates. Dilute 1.280 specific gravity

b. Preservation. Keep all exposed bare metal

electrolyte as issued, to 1.200 to 1.240 specific gravity

surfaces coated with a preservative. Pay particular

reading at full charge. Recharge the battery at 1.160

attention to damaged or unpainted surfaces. Cover all

specific gravity. The battery will self discharge at a

paint cracks and chip marks as soon as possible to

higher rate if left standing for long periods of time at

prevent corrosive effects.

high temperatures.

2-14.

Operation in Salt Water Areas

d. Fuel System.

Service the fuel system as

directed in paragraph 3-4, Preventive Maintenance.

a. General. The corrosive effect of salt water and

Check the fuel for water content before filling the fuel

salt water spray is very extensive. When operating in

tank.

High temperatures and cooling off cause

salt water areas, observe the following precautions.

condensation in storage drums.

b. Preservation.

e. Lubrication. Lubricate as specified in the current

(1) When exposed to salt water, rinse with fresh

lubrication order.

water, and dry the truck thoroughly as soon as possible.

f. Parking.

(1) Do not park the truck in the sun for long

2-5