Section VII. TIRES
wheel. Because of this, a chamfer has been provided on
the outside edge of the wheel and on the end of the
Refer to TM 10-3930-620-12 for removal and installation
inside diameter of the tire's metal insert. The chamfers
of drive or steer wheels and servicing of wheel bearings.
help center the wheel and tire during the pressing
3-50. Cushion Tire Replacement
operation and reduce the possibility of misalignment.
a. General. The wheels used for cushion tires are
machined from castings. Any misalignment of the tire
and wheel, while the tire is being pressed
onto the wheel, can cause possible damage to the
Figure 3-92. Cushion tire replacement.
measure how far wheel is recessed inside the tire.
New tire must be replaced at the same position that the
(1) Check inside diameter of metal insert of
worn tire is installed on the wheel. A spacer, slightly
new tire. Remove any scale or rust with sandpaper.
smaller in diameter than the inside diameter of the tire
Clean inside of metal insert and lubricate it with bearing
insert and the same thickness as the depth of the
recess, can be used to obtain the proper amount of
(2) Place a circular ram on the press table.
The length of the ram must be longer than the width of
(4) Position wheel assembly with worn tire on
the old tire that is to be removed to allow complete
top of circular ram so outside of wheel is positioned
removal of old tire.
The outside diameter of the ram
upward. The outside edge of the wheel has a chamfer to
must be small enough to fit loosely in the insert of the
help guide the new tire onto the wheel. The chamfered
tire, but must be large enough to rest squarely on the bull
edge must always be the leading edge of the wheel
gear's flat surface (drive wheel or on the flat surface at
whenever a tire is pressed onto a wheel.
the outer edge of the wheel (steer wheel).
(5) Center the wheel assembly on top of the
(3) If the outside edge of the wheel is not flush
ram and make certain they make-up
with the edge of the metal insert in the old tire.