c. The outside diameter of the ram must be small
enough to fit loosely in the insert of the tire, but large
enough to rest squarely on the flat surface at the outer
edge of the wheel.
d. If outside edge of the wheel is not flush with the
edge of the metal insert in the old tire, measure how far
wheel is recessed inside the tire (fig. 7-6). New tire
must be replaced at the same position that worn tire is
installed on wheel.
e. Use a spacer, slightly smaller in diameter than
inside diameter of the tire insert and the same thickness
as the depth of the recess, to obtain proper amount of
f. Position wheel assembly with worn tire on top of
circular ram so outside of wheel is positioned upward.
The outside edge of the wheel has a chamfer to guide
the new tire onto the wheel. The chamfered edge must
always be the leading edge of the wheel whenever a tire
is pressed onto a wheel.
g. Center wheel assembly on top of ram and make
certain they match squarely.
Figure 7-6. Wheel recess measurement.
h. Position new tire on top of wheel and tire
assembly. Align new tire and wheel so the two are
l. Position spacer, refer to step e, inside the new tire
concentric with each other.
so it rests squarely on the outer edge of the wheel.
i. Start pressing new tire onto wheel and worn tire off
Continue pressing until new tire is correctly positioned
the wheel. Run press slowly for first couple of inches of
on the wheel.
travel because this is the critical state of the pressing
m. Release press and remove wheel, with new tire
assembled, from ram. Remove worn tire from press
j. If tire begins to cock, stop press immediately and
table. Wipe off grease and inspect wheel and tire
realign tire. A sharp jar with a soft mallet will usually
realign tire on wheel.
k. If wheel is to be recessed in tire, stop press after
7-8. Tire Installation
tire is started on the wheel.
Refer to paragraph 7-4 and install the wheel and tire on
the lift truck.