Replacing Bull Gears .

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

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