Genie GR-12 Service Manual page 67

November 2005
REV B
Inspection
Raised or Turned Pins
Chain Side
Chain Anchors
chain
anchors
Idler Wheels
idler wheel
Cracked Link Plates
Part No. 84700
Procedure
Visually inspect for raised
pins.
Visually inspect for
turned pins by insuring all
the flats on the "V" heads
are aligned.
Visually inspect for wear
patterns on heads of link
pins and outside link
plates where they contact
the idler wheel.
Visually inspect chain
anchors.
threaded
rod
Visually inspect chain
idler wheels.
Visually inspect chain link
plates for cracks.
GR-12 • GR-15 • GR-20
Section 4 • Repair Procedures
Inspection Failure
Raised pins.
Misalignment of flats on
all "V" heads.
Wear on pin heads or
noticeable wear in the
profile of the outside link
plate.
link plate wear
Broken chain anchor
fingers.
Bent or damaged anchor.
Twisted or misaligned
chain anchor.
Threaded rod not visible
in inspection hole.
Idler wheels have badly
worn flanges.
Idler wheels have
grooves worn into chain
contact surface.
Cracks in any chain link
plate.
MAST COMPONENTS
Inspection Remedy
Replace both chains on
that column section. Do
not repair just the
affected portion of the
chain.
Replace both chains on
that column section. Do
not repair just the
affected portion of the
chain.
Replace both chains on
that column section. Do
not repair just the
affected portion of the
chain.
Check alignment of chain
anchors and idler wheels.
Replace chain anchor.
Replace chain anchor.
Replace chain anchor
and threaded rod.
Re-align chain anchor to
ensure even loading of
chain.
Replace idler wheel and
check chain alignment.
Replace idler wheel.
Replace both chains on
that column section.
Replace entire chain. Do
not repair just the
affected portion of the
chain.
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