(3) Remove radiator as illustrated in figure 4-52.
(b) Plug all other openings and install the
b. Cleaning.
radiator cap.
(1) Flush inside of radiator with an approved
(c) Immerse radiator in water and apply air
cleaning solvent (TB ORD 651).
pressure of 5 psi to radiator.
(d) Look for leaks as indicated by air bubbles.
CAUTION
(e) Remove the radiator, plugs and air hose.
Do not use high pressure air or water that
d. Replacement. Replace a damaged or defective
could damage the radiator core.
radiator.
(2) Clean radiator core with compressed air or
e. Installation.
water under pressure from fan side of core.
(1) Install radiator as illustrated in figure 4-52.
(3) Clean overflow line with compressed air.
(2) Install radiator fan guards as instructed in
c. Inspection and Testing.
paragraph 4-57.
(1) Inspect radiator for damage and leaks.
(3) Service cooling system as instructed in
(2) Test for leaks as follows:
paragraph 3-21.
(a) Insert air hose in radiator outlet pipe and
caulk around the base.
Section XVI. CARRIER ENGINE ELECTRICAL SYSTEM
CONTROLS AND INSTRUMENTS
electrolyte specific gravity of each cell; correcting
4-60. General
readings to 770F., by using TM 9-6140-200-15.
(2) The battery is now ready for use unless one
The carrier electrical system is a 24-volt system and
or more of the following conditions exist. The specific
consists of four 12-volt batteries, a generator, generator
gravity is below 1.250 after the 30-minute stand, the
regulator, starter and starter solenoid, lighting system,
battery will not be used within 12 hours after filling, or the
panel switches and gages, and connecting wires and
battery is going into service in temperature below "0"
cables.
degree F. If one or more of the above conditions exist,
CAUTION
the battery should be charged until the specific gravity
Remove ground cable from battery
becomes constant after three consecutive 30-minute
before servicing or removing any
readings. Battery electrolyte shall then be adjusted to
electrical component.
1.280 0.010. Constant-current charging should always
4-61. Batteries, Cables, and Battery Box
be used if available, but constant potential may be used
a. Service and Testing.
if temperature is controlled below 130 F. by interrupted
(1) Fill cells to bottom of square or 3/8 inch above
charging.
separators with sulfuric acid of 1.280 + 0.005 specific
b. Removal (Model 2380).
gravity at 770F.
Battery and acid must be at a
(1) Remove box top plate, inner cover and
temperature above 60 F., but preferably not above
battery hold-down bracket as illustrated in figure 4-53.
1000F.
Let battery stand 30 minutes after filling; then check
4-59
