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CABLE REEL OPERATION
The operator should spot the haul units. Do this by suspending the dipper above the spot where you want to dump. Each haul unit driver can then position his truck body in the center of this target area.
CAUTION: Set the hoist brake to hold the loaded dipper in position if spotting time will exceed 30 seconds.
The working face often has difficult areas where blasting failed to fragmentize the rock or material. Avoid these areas while loading the truck. Loosen and break out the difficult/tight material while waiting on haul trucks to return.
Haul truck spotting can also be done quickly by keeping the pit area immediately within the radius of the boom point clear of rocks and debris. This housekeeping practice can also reduce the cost of shovel crawler maintenance and haul truck tire expense.
CAUTION: Do not sweep rocks or blocks of material on the floor of the pit with the dipper. This practice will accelerate wear and cause serious machine damage.
CABLE REEL OPERATION
This unit is mounted at the rear of the lower frame assembly. Its function is to handle the trail cable, that supplies electric power to the machine, during machine relocation. It is a self-contained unit that is powered by an air operated motor. Refer to the equipment manual from the manufacturer of this unit for more detail.
DANGER! HIGH VOLTAGE! - DO NOT REMOVE THE GUARDS OR OPEN ANY ENCLOSURES ON THIS CABLE REEL UNTIL POWER IN THE TRAIL CABLE HAS BEEN SHUT OFF AND ITS CONTROL BREAKER AT THE MINE SUB-STATION LOCKED OUT IN ITS TRIPPED POSITION. Only qualified personnel are permitted to work on this cable reel assembly. Accidental contact with energized electrical components will cause death.
Compressed air is supplied to the cable reel by the compressor on board the machine. The manual control valve for the reel is mounted on the rear of the unit on a swing out boom. This boom arrangement permits the reel operator to be in view of the machine operator during operation.
When the machine is operating (compressed air is in the supply lines), the cable reel can be operated in its constant tension condition and will perform its function unattended. To put the cable reel in its constant tension condition, move the lever on the manual control valve to its reel in position. The valve is detented and the control lever will stay where it is positioned at either of three settings.
With the control valve set at reel in, the trail cable will automatically wind onto the cable reel when the machine is propelled in reverse direction toward the trail cable. When machine is propelled forward away from trail cable, the trail cable will be pulled off cable reel. Anytime machine is stopped, cable will cease winding onto or from reel.
The tension imparted to the trail cable by the reel in this constant tension operation is adjustable by a pressure regulator on the right side of the cable reel. It is correct when there is sufficient pull on the trail cable to wind onto the reel, but not so great as to put unnecessary strain on the cable. Report any problems with cable reel operation to the maintenance crew so they can adjust the tension during the next preventive maintenance period.
The unwind position of the manual control valve is used to remove trail cable from the reel. It need only be used to remove cable from reel for change out or repair/maintenance if constant tension operation is utilized for normal machine operation.
When the manual control valve is in its neutral or centered position, the reel will not unwind or reel in. It is locked in position by the valve.
NOTE: To avoid having the cable come of the reel anytime the machine is completely shut down (air compressor off), place the cable reel's manual control valve lever at its neutral (centered) position before leaving the machine.
