Do not use salt or mineral water solutions in the system.
CAUTION
(8) Keep all leaves, insects, dirt, and other
Unless the engines are running, or the batteries are
obstructions out of the radiator core and fins.
immediately charged, do not add water in subzero
(9) If the engine continues to overheat, report to
temperatures.
organizational maintenance personnel.
(2) Keep all wiring connections and battery terminals
b. Engines.
tight and free from snow and ice.
(1) Use only the crankcase oil recommended in the
(3) In extremely low temperatures, remove the
lubrication order.
batteries and place in a heated shelter when not in use.
(2) Open all sliding panels in the cab to provide as
e. Controls and instruments. Due to congealing
much ventilation for the engines as possible.
properties of lubricants in cold weather, operation of
(3) Keep the engine clean. Accumulations of dust
controls may be sluggish when first used. Do not force
and oil form an insulation against cooling air from the
levers in an attempt to put them in operation. Allow the
fan.
engine to warm up slowly. This will allow the lubricants
c. Electrical System.
to thin.
(1) Check batteries at frequent intervals and fill to
f Fuel Systems. Fuel tanks should be kept full as
proper level with water.
possible at all times to minimize condensation. If the
(2) Never allow batteries to overheat in service.
presence of water is noted in the fuel supply, drain and
Guard against this by opening the battery box and
refill with clean fuel.
allowing air to circulate around the batteries.
g. Brakes. Drain air reservoirs after operation to
2-21. Operation Under Sandy or Dusty Conditions
remove condensation and prevent freezing.
a. Inspection and Lubrication. Fine sand or dust has a
h. Extreme Cold Weather Starting Carrier Engine.
tendency to penetrate into bushings and bearings.
(1) Before attempting to start the carrier engine in
Because of this, the unit must be inspected, lubricated,
extremely cold weather, prime engine using quickstart
and cleaned at more frequent intervals.
Remove
system as directed in paragraph 2-28.
accumulations of sand or dirt and clean all lubrication
(2) Start the engine (para 2-10 or 2-11).
fittings thoroughly before attaching the grease gun.
b. Fuel System. Keep fuel tank filler caps tight to
CAUTION
prevent sand or dust from entering fuel tank. Service
If any instruments indicate dangerously
fuel filters frequently to keep them free of sand and grit.
abnormal conditions when the crane carrier
c. Revolving Frame Roller Path. Operating under
engine starts, stop the engine at once and
extreme sandy or dusty conditions will require frequent
inspect for deficiencies, and report them to
inspections of the revolving frame roller path. Never
Organizational Maintenance.
allow lubricant to collect on the roller path as it will collect
i. Extreme Cold Weather Starting Crane Engine.
sand and cause rollers to wear excessively.
(1) Prime engine as directed in paragraph 2-28.
d. Clutches and Brakes. Inspect clutch and brake bands
(2) Start the engine (para 2-16).
frequently and blow out or wipe off accumulation of sand
2-20. Operation in Extreme Heat
and dirt. Failure to keep bands clean will result in worn
a. Cooling System.
bands, scored drums, and unsatisfactory operation.
(1) Make sure the system is clean and free flowing.
e. Cables. Keep all unused cables in boxes. Clean
(2) Keep the coolant level in the radiator as high as
operating cables frequently to prevent excessive cable
possible.
wear and to insure satisfactory operation.
(3) Keep the water pump and its drive well
f. Open Gears. Check open gears frequently to see that
lubricated.
they are free of sand and dirt which will cause gears to.
(4) Keep the fan belt adjusted properly. Be sure
wear rapidly. Wash lubricant and foreign matter from
there is no obstruction of air to the fan.
gears and apply new lubricant. Application of new
(5) If the engines become overheated from lack of
lubricant is important to prevent wear and maintain
water, let the engine run at a fast idle and add water
satisfactory operation.
slowly.
(6) Drain the cooling system by opening the drain-
cocks on the radiator and the engine block.
Flush out system.
(7) Use only clean water when filling the radiator.
2-45
