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12 ► CO23 User Manual
NOTE:
If uncoupled hoses are left in the sun, pressure in-
crease within the hose may make them difcult to
connect. When possible, connect the free ends of
operating hoses together.
TOOL OPERATION
NOTE:
At the beginning of each shift or when a new cutoff
wheel has been installed, run the saw at operating
speed for at least one minute before starting work.
Keep personnel from in front of or in line with the
wheel.
GENERAL PROCEDURES
1. Whenever possible, the work should be held down
and securely supported on both sides of the cut.
2. Press down the safety catch; then slowly squeeze
the trigger. Start the cut with the wheel rotating. Start
the work gently, do not “bump” the work.
3. Feed the wheel through the material as fast as pos-
sible without allowing the wheel to reduce its speed.
Cutting through the material too slowly allows heat
expansion and can cause wheel “pinching” in the
material. “Pinching” the wheel from heat expansion
is one of the most common causes of wheel break-
age.
CARE OF ABRASIVE CUTOFF WHEELS
All abrasive cutting-off wheels are breakable and, there-
fore, care must be exercised during handling and stor-
age to prevent damage.
STORAGE
Thin, organic bonded wheels such as cutting off wheels
should be laid horizontally on a at surface of steel or
similar rigid material away from excessive heat or mois-
ture. Wheels should not be stored where they will be
exposed to high humidity, water, other liquids, or freez-
ing temperatures. Temperatures low enough to cause
condensation on the wheels when moving them from
storage to an area of higher temperatures should be
avoided.
When used on cutoff saws carried on emergency vehi-
cles, wheels should be removed after use and discarded
or carefully stored as described in this section.
If wheels are supplied with blotters attached, suitable
separators should be used to preserve atness.
INVESTIGATION OF WHEEL BREAKAGE
Wheels designed for use with hand-held portable saws
are specically manufactured for this application. They
are manufactured to be extremely tough and are difcult
to break under normal use.
If a wheel breaks during use, a careful investigation
should be conducted by the user to determine the cause
of the breakage. The cause must then be corrected as
soon as possible.
If the user is unable to determine the cause of breakage,
the wheel manufacturer should be consulted.
COLD WEATHER OPERATION
If the saw is to be used during cold weather, preheat
the hydraulic oil at low engine speed. When using the
normally recommended oils, oil should be at or above
50 °F/10 °C (400 ssu/82 centistokes) before use.
Damage to the hydraulic system or saw can result from
use with oil that is too viscous or thick.
OPERATION