WARNING: Replace screws that are bent, have distorted and worn
threads, contain fractures and have damaged threads in set screw hole.
Step 6.
SCREW CUP SCP-2
A. Inspect screw cup for fractures, damage and wear. Serrations must be
sharp and free of imperfections and foreign matter.
B. Screw cups must turn freely in the screw. When installing screw cup, in-
sert lubricant in recess of screw. Recommended lubricant is powdered
graphite or Molybdenum Disulfide grease. Drive spirol pin thru the body of
the screw. For capacities greater than 50 tons: Insert screw cup, tighten
set screws in screw, making certain that the set screws are positioned in
the circular groove provided in the screw cup. Refer to exploded view.
Tighten screws until screws lock on screw cup.
C. Back up on set screw until point is just clear of screw cup but still within the
circular groove. Rotate screw cup 360 degrees to make certain that the
set screws do not bind on screw cup. Refer to exploded view.
D. Attempt to remove screw cup from screw. Spirol pin will prevent removal
when properly positioned.
WARNING: Replace worn, dull or damaged screw cups.
Step 7.
CAM JAW SCP-3
A. Inspect cam jaw for fractures, damage and wear. Serrations must be
sharp and free of imperfections and foreign matter.
B. Check pin holes for fractures and wear.
The cam jaw is supplied with gripping serrations on both ends. When one set
of gripping serrations is dull or damaged, the cam jaw may be reversed to pro-
vide new gripping surfaces.
WARNING: Inspect cam jaw body and pin hole for fractures and wear
before using reverse side of gripping surface. Replace cam jaws that are
worn, have dull or damaged gripping surfaces or contain fractures.
Step 8.
SPRING SCP-4
A. Inspect spring for damage or distortion.
B. Inspect spring retaining screws. Both screws must be in place.
C. Spring must be in place before installing cam jaw. Spring must be de-
pressed to aid in installing cam jaw pin.
