8
SIOUX
TOOLS
No.
656
Rocker
Arm
Attachment.
Assembly
and
Operating
Instructions.
GRINDING
ROCKER
ARMS
Dress
wheel
with
built-in
dressing
tool
on
right
side
of
machine
before
mounting
the
SIOUX
Rocker
Arm
Attachment.
ASSEMBLY
AND
OPERATION
The grinding wheel should
be
properly dressed before
mounting the Rocker Arm Attachment.
Place the pivot post, with its swivel block base and the
radius arm base, in
the%"
diameter hole in the
top
of the
right wheel guard, the flat
on
the post facing forward. Seat
the post firmly and secure
with
the oval point set screw.
Place arbor holder on radius arm, cone arbor in the arbor
holder and alignment gauge
on
arbor. Place radius arm in
the radi
us
arm base.
Do
not
tighten the two cone
point
set
screws.
Adjust height of alignment gauge to the horizontal
center
of
the grinding wheel and position the arbor holder
to
allow the recessed pad of the alignment gauge to make
full
contact with the face
of
the grinding wheel. Hold recessed
pad of alignment gauge against face of grinding wheel while
tightening three
thumb
screws. Hold alignment gauge
firmly
against wheel face and tighten the two cone
point
set screws
locking the radius arm.
Remove alignment gauge.
Install the splined cone (with
flat
point set screw) on
arbor, small end down. Place rocker arm
on
arbor and
adjust
upper cone position
to
bring rocker arm pad to horizontal
center
of
wheel. Place lower cone
on
arbor
to
firmly hold
rocker arm. Position arbor holder to grind
full
pad area.
Wet grind rocker arms
by
lightly pressing arm pad against
grinding wheel. Swivel
attachment
left
and right
until
de-
sired surface
is
attained. The radius arm can
be
swung
upward to facilitate loading and unloading. Proper adjust-
ment
of the tens
ion
screw will allow the operator to move the
radius arm
up
or
down-but
not
drop accidentally.
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