Pneumatic Tires - International Harvester Company CUB Operator's Manual

PNEUMATIC TIRES
Observe the following instructions and rec-
ommendations in order to secure maximum
life and efficient service from the pneumatic
tires.
CARE OF TIRES
Avoid stumps, stones, deep ruts, and
other hazards. Cuts in tires should be re-
paired immediately, as neglect decreases
tire life. Keep the tire s ,free from oil and
grease, as both de stray rubber. After using
the tractor for spraying (insect control work),
use water to remove any chemicals that may
be on the tires.
INFLATION
Keep the pneumatic tires properly inflated
to the pressures shown in the tables. Under-
inflation will damage the tire cord body and
may cause the tire to slip on the rim and tear
out the tube valve stem. Overinflation results
in excessive slippage, causing .rapid tire
wear.
Check the air pressure once a week with
an accurate low-pressure gauge having one-
pound graduations. Do not allow the air pres-
sure to drop below the recommendations.
Always see that the tire valve caps are in
place and are screwed tightly. The caps pre-
vent the loss of air through the valve core,
and keeps loose soil, mud, gravel, snow, and
ice from entering and damaging the .valve core.
Tires can be inflated with a pressure pump,
hand pump, or a spark plug pump. Spark plug
pumps can be purchased from International
Harvester dealers.
USING THE SPARK PLUG TIRE PUMP
Note:
Do not use a diesel engine as the
source of power.
Remove one of the spark plugs from the
tractor engine, or any carbureted engine, and
replace it with pumping element "A" having
the correct spark plug thread size.
See lIIust. 49.
Attach one end "B" of the pump hose to the
pumping element, and other end "C" to the
valve stem of the tire to be inflated.
Start the engine and run it at low speed for
maximum efficiency.
lIIust. 49
Tire pump, hose, and air gauge.
SHIPPING TRACTORS EQUIPPED WITH PNEUMATIC
TIRES \
When tractors are transported on a carrier,
such as a railroad car or trailer, rear tires
should be inflated up to 30 pounds. Front tire s
to the maximum pressures shown in the table.
The higheJ;' pressure must be reduced to oper-
ating pressure
BEFORE
the tractor is removed
from the carrier. Inflation pre s sure should be
as shown in the following table s to make po s -
sible rigid blocking and to prevent bouncing.
49
OPERATING PRESSURE FOR LOW·PRESSURE
TRACTOR TIRES
fl
' .
Caution!
Upon receiving your tractor,
~
immediately adjust the air pressure in
" ®
the tires as indicated in the tables.
Front Tire Loads in Pounds at Various
Inflation Pressures
Underscoring indicates maximum recommended load per tire.
Pounds per square inch
20
241
28
32/
36 40
44
Tire Ply
Size
lRating
Kilograms per square centimeter
1.40 1.68 1.97 2.25 2.53 2.81 3.09
F-2 Tread
4.00-12 4 330 365 400 435 465
495 520
4.00-15
4 390 435 475 515 550
585
625
-
I-I Tread
4.00-12
4 450 500 550 595 635 675
Tire Code Marking Tire Industry Type
F·2 •...••........•......••...•...•.•.. Agricultural
1.1 ................................ Rib Implement