Radiator Core; Fan Belt Tension; Removing The Fan Belt; Adjusting The Fan Belt - International Harvester Company CUB Operator's Manual

COOLING SYSTEM
RUST PREVENTION. Continued
For rust prevention during winter use of
the engine, a fre sh filling of antifreeze con-
taining an effective corrosion preventive
should be used. In the spring, drain and dis-
card the old antifreeze solution, as the rust
preventive or "inhibitor" may be exhausted
from contamination and continued use.
After draining the antifreeze, a rust pre-
ventive should be added to the cooling water
to protect the cooling system during warm
weather operation. This inhibitor solution
should be drained and discarded in the fall
when danger of freezing again makes nec-
essary the use of an antifreeze.
Illust. 23A
Fan and generatar belts.
RADIATOR CORE
Overheating is often caused by bent or
clogged radiator fins. If the spaces between
the radiator fins become clogged. clean them
with forced air or water. When straightening
bent fins. be careful not to injure the tubes
or break the bond between the fins and tubes.
FAN BELT TENSION
Belts on new tractors (also new replace-
ment belts) lose their tension as they "seat"
themselves in the pulleys. New belts should
be checked after the first 10 hours of engine
operation and eve.ry 50 hours of engine opera-
tion thereafter to assure maintenance of the
correct tension. The tension is correct when
the belt can be depressed without effort by the
thumb. approximately 1/ 2-inch to 3/4-inch.
midway between the two pulleys. See Illust. 23.
If the slack is more than I-inch. adjust the
belt as follows:
before adjusting the fan belt tension. The ten-
sion of the fan belt is adjusted by loosening fan
spindle "G II (1IIust.23A) and moving the fan and
hub assembly up or down until the correct ten-
sion is obtained. After the correct tension is
obtained, tighten fan spindle ffG 'f. To adjust
the generator belt, see "Generator Belt."
After a new belt has been in use approxi-
mately 10 hours, check the tension and adjust
again if necessary.
Removing the Fan Belt
To remove the fan belt. loosen fan spindle
lIC't (1IIust.23A) and slide the fan and hub assem-
bly to the bottom of the groove on the crank-
case front cover. The fan belt can then be
slipped over the bottom drive pulley and
worked up over the fan blades.
Replacing the Fan Belt
Replace the fan belt when it becomes soaked
with grease, or when it is so badly worn that
it does not drive the fan at the proper speed.
Illust. 23
Correct belt tension.
When replacing the belt, reverse the pro-
cedure outlined uIlder "Removing Fan Belt,"
except that belt can be started on the lower
pulley by hand, and by slowly cranking the
engine. the belt will find the correct position.
Adjusting the Fan Belt
When the tractor is equipped with a gener-
ator, first loosen nuts "A II and "B" (1IIust. 23A)
23