Section V. OPERATION UNDER UNUSUAL CONDITIONS

TM 5-2420-224-10

Section V. OPERATION UNDER UNUSUAL CONDITIONS

2-8.

OPERATION IN UNUSUAL WEATHER

a. Extreme Cold.

(1)

General. If operating backhoe (SEE) or crane (HMMH) in extreme cold, make sure proper operator

protection is worn. Extensive preparation of the vehicle is required for extremely cold weather.

Extreme cold causes many problems:

Lubricants thicken or congeal

Batteries may freeze or lose electrical efficiency

Fuel may not readily vaporize for combustion

Various materials will become hard, brittle, and easily damaged

(2)

Cooling System. Inspect for leaks and general condition. Make sure clamps are tight and there is

enough fluid in expansion tank. If system needs service, notify unit maintenance.

(3)

Fuel Tank. Do not allow fuel tank to remain partially empty for a long period in extremely cold

weather. Fill to filler neck after each work period to help avoid water condensation in the fuel tank.

Remove all ice and snow from around filler neck before refueling.

(4)

Electrical System.

(a)

Inspect battery cables, wiring harnesses, and wiring. Notify unit maintenance if damaged.

(b)

Use lights and other electrical equipment as little as possible when system is not charging.

(5)

Lubrication. Lubricate in accordance with page 2-70.1.

(6)

Engine Operation.

WARNING

Starter fuel is highly flammable. Do not expose to high temperatures.

Store refill bottles in cool place, especially during summer months.

Failure to do so could result in serious personal injury.

CAUTION

Before starting, make sure fuel and oil in engine are thin enough to flow.

If oil drips from dipstick, it is thin enough for engine to be started.

Failure to observe this caution could result in damage to equipment.

(a)

Use ether start aid.

Change 2