User's Manual

RCC130H-CRACK SAW OPERATION AND PARTS MANUAL REV #1 (11/18/04) PAGE 40
TROUBLESHOOTING
periodically with an electronic tachometer to ensure
proper operational speed for the blade.
UNEVEN SEGMENT WEAR
a) If wet sawing, insufficient water flow to one side of
the blade which effectively reduces the side
clearance. Flush the water system. Determine that
water is being adequately and equally distributed to
both sides of the blade.
b) Worn machine components. Determine that
machine components, including bearings, belts and
the arbor shaft are not excessively worn and
requiring replacement. Determine that the engine
runs smoothly to prevent harmonic vibrations which
can result in the blade impacting the work surface
with impulse type loads.
c) Saw head is misaligned. Periodically check saw
head for squareness in both vertical and horizontal
planes.
SEGMENT CRACKS
a) Blade matrix composition is too hard for the
material being sawed. Utilize a blade with a softer
matrix composition.
SHORT BLADE SERVICE LIFE
a) Utilizing the improper blade for sawing a specific
material. Avoid the use of a general purpose blade
for sawing a single specific material. General
purpose blades are intended to saw a wide range of
materials. Since it is unlikely that the machine will
saw the proper amount of both hard and soft
materials proportionately at all times, this type of
blade is not the most economical method of sawing.
Use a blade with the matrix composition designed
specifically for the material and aggregate being
sawed.
b) While wet sawing, improper water flow is being
delivered to both sides of the blade. Determine that
all water hoses are clean and free of any internal
blockage. Approximately two to five gallons of water
per minute are required to properly cool a blade.
c) Worn machine components. Determine that
machine components including bearings, belts and
the arbor shaft are not excessively worn and
requiring replacement. Determine that the engine
runs smoothly to prevent harmonic vibrations which
can result in the blade impacting the work surface
with impulse type loads.
d) Loss of power, resulting from improper engine
RPM speed, electric motor voltage or loose V-belts.
See Service section.
BLADE WILL NOT CUT
a) Blade matrix composition is too hard for the
material being sawed. Utilize a blade with a softer
matrix composition.
b) Blade has become dull, probably as a result a
hard matrix composition being utilized to saw a hard
material. Dress or sharpen the blade by utilizing it to
saw a softer material to expose new diamonds in the
segments. If continual dressing is required, it would
indicate that the blade matrix composition is too hard
for the material being sawed.
c) Failure to initially break in a new blade on a
specific material being cut. Allow the blade to
sharpen itself on the material to be sawed when first
placing it on the Crack Saw. This is the proper
method to break in a new blade. Do not force the
new blade into a cut as this will generally aggravate
the problem.
d) Loss of power, resulting from improper engine
RPM speed, electric motor voltage or loose V-belts.
See Service section.
e) When dry sawing, the blade becomes dull as a
result of overheating, allowing the segment rim to
"mushroom" or melt. Discontinue usage and contact
the diamond blade manufacturer.
BLADE BLANK WARPAGE
a) The blade blank has been overheated. While wet
sawing, improper water flow is being delivered to
both sides of the blade. Determine that all water
hoses are clean and free of any internal blockage.
b) The blade blank has been overheated. While dry
sawing, periodically allow the blade to run out of the
cut for up to 20 seconds for every minute sawing.
This procedure will allow the blade to cool in a few
seconds and allow the sawing process to proceed. If
the blade has been warped (dark blue color), it may
be damaged beyond repair. A blade in this condition
should be discontinued from use immediately and
properly discarded.
c) The blade blank has been overheated as a result
of spinning on the arbor shaft. Check the arbor shaft,
hub body and hub flange for excessive wear and/or
damage. Properly tighten the arbor shaft nut.
d) Unequal flange clamping forces. The hub body
flange and hub flange must be of the same, identical
diameter. Always replace any questionable
component with a factory replacement part only.