user manual

RCC130H-CRACK SAW OPERATION AND PARTS MANUAL REV #1 (11/18/04) PAGE 23
ASSEMBLY INSTRUCTIONS/OPERATIONS
5) Turn the height adjustment lever clockwise to
lower the blade into the crack until the desired
sawing depth is achieved. Each full turn of the crank
lever will raise/lower the blade approximately 1/16
inch.
6) Following the random crack direction and/or
pattern with the blade is accomplished by viewing
the blade and crack in the louvered opening in the
blade guard. The louvers are intended to provide
protection for the operator in the event that a
diamond segment becomes separated from the
blade blank. Probable causes for such occurrences
are discussed in detail in the Troubleshooting
section of this manual.
a) The geometric design of the louvered blade guard
is intended to provide a high mathematical
percentage of protection for the operator in a normal
operating position as described in this manual. The
mathematical percentage will decrease for operating
positions not described in this manual.
b) In the event of diamond segment separation from
the blade blank, there is a high mathematical
probability that the segment will be thrown forward
against the dust pan located under the main frame
or directly against the forward (non louvered) section
of the blade guard. The manufacturer has
conducted extensive testing to substantiate this
theory. In actual field tests, diamond segments were
purposely separated from the blade blanks through
abusive operational techniques. In all field tests, no
separated diamond segments made direct contact
with the blade guard louvers.
c) In the very low probability that a diamond
segment would make direct contact with the blade
guard louvers, the geometric design has a high
mathematical probability to not allow the segment to
penetrate the vertical plane as defined by the
location of the louvers. The spaces, angle
orientation and number of louvers minimize the
mathematical probability that a segment can
penetrate the vertical plane, exit the louvers and
eventually strike the operator.
d) The geometric configuration of the louvers are
designed to allow for adequate and/or proper
visibility for the operator during the sawing process.
With use, concrete and/or asphalt dust will
accumulate at the bottom of the blade guard
opening. At regular intervals, this material should be
removed to enhance operator visibility during the
sawing process.
DANGER
DO NOT MODIFY THE ORIGINAL OPERATING
CONFIGURATION FOR THE LOUVERS FOR ANY
REASON. MODIFICATIONS TO THE LOUVERS
CAN RESULT IN PROPERTY DAMAGE AND/OR
PERSONAL INJURY.
7) Proper operator posture and stance will enhance
operational safety and overall productivity. FIGURE
24 depicts a proper operator's position. FIGURE 25
depicts an improper operator's position that can
accelerate fatigue, decrease productivity and reduce
safety. The downcut orientation of the diamond
blade will normally produce a "self-propelled" effect
against the operator. This effect is intended to
reduce the operator fatigue associated with the
operation of the machine and to increase overall
productivity.
8) In some operating conditions, it may be
necessary for the operator to apply a resisting force
(push) against the operator handle to counteract the
"self-propelled effect. In some other operating
conditions, it may be necessary for the operator to
apply a force (pull with) to the operator handle in
order to assist the sawing action of the Crack Saw.
FIGURE 24