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TM 10-3930-644-14&P
(6) To reinstall the bull gear, align the spiral pin
holes and the pins, and tap until the gear is
started into the wheel.
Install capscrews
originally removed and continue gear installation
by tightening capscrews and tapping the bull
gear at the same time.
(7) To ensure that the bull gear is seated correctly
in the wheel bore, try to insert a .003" feeler
gauge between the gear and the shoulder.
When the gear is properly seated, the feeler
gauge will not enter at any paint.
c. Replacing Solid or Cushion Tire
The wheels used or all cushion tire lift trucks are
machined from a casting. Any misalignment of
the wheel and tire, while pressing the wheel into
the tire, can cause possible damage to the
wheel.  Because of this, a chamfer has been
provided on the outside edge of the wheel and
on either end of the metal insert located on the
inside diameter of the tire. The chamfers help
Figure 7. Bull Gear Removed
center the wheel and tire for pressing and
reduce the possibility of any misalignment. The
b. Replacing Bull Gears .
chamfered edge of the wheel must always be
the leading edge of the wheel when the wheel is
being pressed into the are.
(1) Remove the three capscrews which bolt the bull
gear to the inner side of the wheel.
When replacing worn or damaged tires the
(2) Turn the wheel over and using standard,
wheel chamfer is not noticeable. To assure that
hardened capscrews with three inches of thread,
the chamfered edge enters the new tire first
insert in the holes provided in the bull gear.
always position the new tire on top of the wheel
(Figure 7.)
and tire assembly with the outside of the wheel
(3) Tighten the capscrews evenly until the bull gear
and tire assembly up.
is removed from the wheel bore.
(4) Inspect the bull gear for any broken or worn
teeth or cracks in the ring. Replace if damaged.
(5) To prevent any damage to the bull gear when
installing the spiral pins, the edge of the outer
coil should lie on the bolt circle diameter as
shown in Figure 8.
Figure 9. Tire Replacement
Figure 8. Spiral Pin Installation
2-66

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