e. Cables. Keep unused cables in boxes. Clean
cooling system, shut down the engine and allow it to
cool. Drain the cooling system by opening the drain
and lubricate operating cables frequently.
f. Fuel System. Keep the fuel tank filler cap tight
cocks on the radiator and the engine block, and flush out
the system. Refill the cooling system with clean water;
to prevent sand or dust from entering the fuel tank.
do not use salt or mineral water solutions in the cooling
Service the fuel filters frequently to keep them free from
system.
sand and grit.
(6) If the engine continues to overheat in
g. Footings. Use wood blocking or mats under the
operation, report the condition to organizational
outrigger jackfloats when operating in sand. See that the
maintenance.
carrier does not shift during operation.
d. Batteries.
Keep as much air as possible
2-26. Operation in High Humidity or Salt Water Area
circulating around the batteries. Check the electrolyte
a. General.
Moisture
and
salt will cause
level frequently; add distilled water as necessary to keep
deterioration of paint, cables, wiring. and all exposed
the electrolyte level 3/8 inch above the plates.
metallic parts. Keep parts dry and well lubricated in high
e. Engine Operation. Keep the air intake and
humidity or salt water conditions.
exhaust openings clear. Keep the engine clean, and
b. Wiring. The wiring of the truck crane has been
allow air to circulate freely around the engine.
moisture and fungus proofed, but the sheathing can be
(1) Avoid racing the engine, and avoid
cracked and split during operation. Frequent inspections
operating at full throttle when part throttle will handle the
are necessary to detect worn spots from developing into
load.
short-circuit conditions. Report any such condition to
(2) Avoid lugging the engine; keep the engine
organizational maintenance.
speed high enough to maintain the fan speed.
c. Corrosion Prevention. Completely remove rust
(3) Avoid idling the engine unnecessarily; shut
and corrosion at the first appearance on any part of the
the engine down during a lull in the operation.
truck crane. Wash off salt water and dry all parts
2-25. Operation in Dusty or Sandy Area
thoroughly; paint the exposed surfaces immediately.
a. General. Operation in dusty or sandy areas
Place a film of lubricant or grease tin all polished or
presents special problems due to abrasive action of dust
machined metal surfaces and other surfaces which
which shortens the life of parts. Make every effort to
cannot be painted.
keep dust and sand out of the moving parts of the crane
d. Lubrication. Keep parts lubricated thoroughly,
machinery and engine.
to repel water from polished metal surfaces and to
b. Lubrication.
All lubricants and lubricating
prevent the entry of water into bearings.
equipment must be kept clean. Service breathers and
2-27. Operation at High Altitudes
air cleaners frequently to remove sand and dust.
Operation at high altitudes presents special problems
Lubricate more frequently to keep a supply of clean
due to lower atmospheric pressure and wide temperature
lubricant at moving parts. Clean all lubrication fittings
ranges. At altitudes above 5,000 feet, it may be
thoroughly before attaching the grease gun.
necessary to adjust the carburetor (refer this condition
c. Revolving Frame Live Roller Circle. Keep the
to organizational maintenance). Make certain that the
roller path and rollers clean and dry. Do not lubricate the
air cleaner is clean and free from obstructions.
rollers or the roller path; lubricant on the rollers or roller
Caution: Check the engine frequently for
path will collect sand and cause the rollers to wear
overheating in high altitude operation.
excessively.
d. Clutches and Brakes. Inspect the clutch and
brake linings frequently. After operation in dust or sand,
blow loose grit out of linings. Failure to keep the linings
clean will result in worn bands, scored drums, and
unsatisfactory operation.
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