Creative Engineering ROCK-A-FIRE EXPLOSION - Page 117

Props and Looney Bird
H. The assembly of the Spider's Pulley Plate is done in two
different ways. (See Drawings Pages 3-090 and 3-091) One, is
the amended old pulley plate. Two, is the new mechanisms from
the factory.
1. Watch the plastic bushings (A), if they come out of the hole
the line will wear through from rubbing on the metal Guide
(B). To replace the lines:
a. Shut off the air to the Props Valve Bank. Pull the
Spider into the down position, and note the height of
the Spider off the floor.
b. Cut the lines, near the cable crimps (C), at the Spider
and cylinder. Be careful you don't cut the Cable
Thimbles (D). Do not remove the 3/8" bolt (E), attaching
the Thimble (D) to the cylinder's carrier.
c. Fold the 25' line in half, and attach the Cable Thimble
(D) and Crimp at the center of the line.
d. Route to ends of the new line through the Cable Guide
(B). Re-attach the Spider to the lines at the noted
height off the floor.
2. If the bushings in the Pulleys (E) need replacing:
a. Loosen the set screws in the pulley mount plates (F), or
remove the bolt. Tap out the Pivot Pin (G) and remove
the parts.
b. The bushing pressed into the Pulleys is a 5/16"I.D. x
3/8"0.D. x 3/8" long Flange Bushing. (Part #28-030-040)
Place the Pulley in a vise (wrap it with a rag to protect
it) and drill out the old worn bushing using a 23/64"
drill. You may need to press out pieces of the bushing,
use a small pin or Awl~
c. Press in the new bushing using an Arbor Press, if one is
not available tap it in using a hammer. If a tight press
is not possible, replacement of the part is required.
d. Re-assemble the parts and double check the alignment of
the Pulley Guides (B). Grease the Pivot Pin with black
(C.E.I.) lube. The pulleys should roll freely, hand ream
the bushings if necessary.
3. For any problems in the Spiders Tol-0-Matic cylinder, refer
to Pages 3-009 and 3-011. If replacement of any parts is
required, remember to note the steps you take.
3-Q80