
2 minute read
Typical cutting sequence.................................................... 5
Typical cutting sequence
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CAUTION! Always ensure operator safety while operating the machine.
CAUTION! Always be alert to hazardous conditions and take corrective action as necessary.
IMPORTANT! Care should be taken not to stall cutters on conveyor during cutting operations. Severe damage to motors and gear boxes could occur if cutters or conveyor are repeatedly stalled.
Place gathering head in the float position.
Position conveyor so it doesn't hit the roof, walls, other equipment or any other obstacle. Never operate the conveyor in its fully limited position, right left, up, or down. If in the fully limited position and contacting any obstacle, damage could occur.
Start the gathering head and conveyor. Do not start machine in face or with excessive material in the gathering head.
Engage tram and adjust for speed and direction.
Start cutter head prior to contacting area to cut.
Raise cutter head to desired mining height.
Lower the rear stabilizer to the floor to provide stability if necessary.
Do not lower the shoe enough to raise the rear of the machine. If the shoe is lowered too far the machine will not sump into the face properly.
Engage tram in the forward position.
IMPORTANT! Tram is limited in the forward direction while the cutters are running with the cutter head feedback circuit. As the cutter head begins to cut the material from the face, the sump speed will automatically slow the tram down to prevent over sumping the machine.
Continue to sump until the machine stops tramming. The depth of the sump will depend on the type of material being cut, the diameter of the cutter drum, and bit lacing.
Release tram levers.
Shear down (lower cutter head). The shear down rate is controlled by a shear down relief valve to limit the hydraulic pressure being applied to the cylinders. This is an adjustable feature and can be easily changed as mining conditions change.
To maintain smooth level floor conditions, it may be necessary to tram the machine backward approximately 36 in., thus trimming ridges and smoothing the floor. This may or may not be necessary each cut sequence depending on mine conditions.
Repeat this procedure to desired depth of cut.
Turning crosscuts is accomplished by making a series of partial cuts (sumps) until the machine can be turned to the desired angle.
Relocating the miner
Ensure rear stabilizer is raised from the floor.
Position cutter boom so as to prevent it from hitting roof, ribs, or floor.
Raise gathering head.
Lower conveyor boom down and position so it will not hit roof, ribs, floor or any other equipment or obstacles.
Ensure that trailing cable out of the path of travel.
Ensure there is enough clearance when relocating to avoid damage to machine and ensure operator safety.
Be alert to any people, obstacles, or other machines.
Know the position of fellow workers.
Engage tram in desired direction.