TROUBLESHOOTING
Troubleshooting
ENGINE FAILS TO START
Ignition switch in OFF or cut off position. Place switch in the ON position or move throttle control lever to the ignition operational position.
Incorrect carburetor/fuel ignition system adjustment. See Service section.
Air filter blocked. See Service section.
Ignition wire to spark plug loose or disconnected. Reconnect.
Fuel supply exhausted. Refill the fuel tank.
ENGINE LOSES POWER
Incorrect carburetor/fuel injection adjustment. See Service section.
Water in fuel supply. Drain and replace fuel.
Excessive carbon accumulation in combustion chamber. See Service section.
Fuel tank breather vent closed (if so equipped). Open vent.
Air filter system blocked. See Service section.
OPERATIONAL PROBLEMS.
DANGER
ALWAYS UTILIZE DIAMOND BLADES IN COMPLIANCE WITH ANSI B7.1, ANSI B7.5
AND/OR LATEST REVISION(S) AND APPLICABLE OSHA REGULATIONS. IMPROPER USE OF DIAMOND BLADES CAN RESULT IN PROPERTY DAMAGE AND/OR PERSONAL INJURY.
Copies of ANSI B7.1 and B7.5 for review and education purposes can be obtained from the American National Standards Institute, 1430 Broadway, New York, NY, 10018. Copies of the applicable OSHA regulations governing the use of powered equipment and diamond blades can be obtained from your nearest OSHA office.
DIAMOND SEGMENT LOSS
a)The Crack Saw is not being held firmly by the operator, causing the blade to twist or jam in the work surface. Hold the Crack Saw firmly.
b)Overheating due to inadequate supply of coolant (air or water). This is usually accompanied by discolorations which appear on the blade blank in the area of the segment loss. If wet sawing, provide adequate water flow to both sides of the blade. Determine that no water line blockage exists. If dry sawing, periodically allow the blade to run out of the saw cut for up to 20 seconds for every minute of sawing. This will allow the blade to properly cool before resuming sawing operations .
c)The blade blank wears thin as a result of undercutting by abrasive fines generated by the sawing process. The blade blank wears to a knife edge which weakens the blank and causes a segment to separate. If the fines are highly abrasive, wear resistant blanks should be utilized to retard the undercutting phenomenon. Inspect the blades periodically during usage for this occurrence. If wet cutting, allow for ample water to flush the fines out of the saw cut.
d)Improper clamping action by the arbor shaft hub body and hub flange causes the blade to flutter in the cut or fail to support the blade in proper alignment. Always clean foreign material accumulations from the flange surfaces. Replace the flanges if they become bent or deformed with factory approved replacement parts only.
e)The blade can be too hard for the specific material being sawed, causing excessive dullness and segment separation due to impact loads and/or fatigue. This occurrence can also be the direct cause of frictional heat which can melt the brazing filler material that secures the segments to the blade blank. Use a proper blade specification for the material being cut. Match the segment matrix composition to the specific aggregate material being sawed.
f)The blade rotation while sawing is out of round (not concentric), resulting in direct impulse loads being applied to the segments. Replace worn machine components including bearings and arbor shaft.
g)Improper blade rotational speed which produces excessive pressure on the segments and subsequent failure of the brazed/welded joint, blade blank or segment itself. Determine that the blade is being operated within the industry recommended RPM speed range. Engine RPM should be checked
OPERATION AND PARTS MANUAL REV #1 (11/18/04) | PAGE 39 | |
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