Creative Engineering ROCK-A-FIRE EXPLOSION - Page 69

Hinges
Description: In 1982, Creative Engineering made a change
in the types of hinges used. Before 1982 we used a
oil impregnated bushing in one side of the hinge, and
held the pin solid in the other side of the hinge
using set screws. Since 1982 we have changed to a
needle bearing and free floating type of Pin.
A. The old style hinge will generally go through 3 steps until it
must be replaced. First the pivot points will dry out from
mis-alignment, side loads or improper maintenance. Second, the
Bushings will wear or become loosened inside of the pressed
hole. Third, the walls of the aluminum hinge will become
elongated. In the first and second steps a hinge can be saved,
but if the hinge is allowed to reach the third step it must be
replaced.
B. If an old style bushing type hinge has developed excessive side
or back and forth play, but the aluminum around the pivot hole
has not been elongated, you may want to replace the bushing.
1. Remove the part from the character and work with it in a
vise. (Refer to the characters movements Pages 3-042 thru
3-093)
2. Drill out the old bushing using a 23/64" drill. Hold the
drill as square as possible to the hole and drill through
the bushing. You may need to press out pieces of the
bushing, use a small pin or Awl.
3. Clean the hinge, make sure no metal chips will catch in
the rebuilt hinge, and cause premature break down.
4. Press in the new bushing using a Arbor Press, if one is not
available, place a piece of wood on top of the bushing and
tap it in using a Hammer. In the case of the old hinges the
bushing used is a 5/16"ID x 3/8"0D x 3/8" long Flange
Bushing (Part # 28-030-040) If the hole is a little over
size, mar the inside of the hole using a awl. If after this,
you still cannot press in the bushing the hinge must be
replaced. Re-assemble the hinges by reversing the
disassembly steps you followed. (See Pages 3-042 thru 3-093)
3-032