8. Rotation pressure gauge: This gauge indicatesthe rotation pressure during drilling.9. Blow pressure gauge: This gauge indicatesdischarged air pressure.10. Blower control lever: This lever controls theamount of air going through the drill steel to clear thecuttings from a borehole. When the lever is turnedtowards the operator, the blow volume increasesgradually. When the lever is turned away from theoperator, the valve is opened fully.NOTE: When drilling, open the blower controllever fully.11. Boom extension control lever: This leverextends and retracts the boom.12. Boom lift control lever: This lever raises andlowers the boom.13. Boom swing control lever: This lever swingsthe boom left or right.14. Guide dump control lever: This lever controlsthe 180-degree forward and backward movement of thedrill guide.15. Guide swing control lever: This lever controlsthe swing of the drill. The maximum swing of the drillguide is 45 degrees to the left and 45 degrees to the right.16. Guide extension control lever: This leverextends the drill guide for an additional extension of upto 5 feet.17. Anti-jamming system on-off control valve:During operation, the anti-jamming system assists inkeeping the drill steel from jamming in a borehole.18. Vaposol system on-off valve: During operation,from a 40-gallon storage tank, the vaposol systemthrows a mist of water down the drilled hole to controldust. It can also be used while drilling to prevent acave-in from loose material in a borehole.19. Needle valve: The needle valve controls theamount of water to be injected into the blow air.20. Panel lamp switch.Positioning for DrillingPositioning the rock drill is performed as follows:1. Position the rock drill by using the tractionlevers.2. Place the crawler chassis in a horizontalposition, when possible, by using the track oscillationlevers, and then set the oscillation lock handles to thedrilling position to keep the rock drill stable whiledrilling.NOTE: The drill operator should approach markedboreholes straight on as much as possible.3. Position the drill guide over the spot to be drilled.4. Extend the guide down until the second or thirdtrack roller is just off the ground. Position the drill guideinward towards the rock drill to compensate for thepressure and angle of the boom when in position fordrilling.5. Before drilling, you must ensure the guide isvertically level by using a builders level on the front andside.Drilling OperationBefore drilling, make sure thegauge indicates 100 psi. Drillingfollows:blow air pressureprocedures are as1. Open the blow control lever to admit air throughthe drill steel and bit.NOTE: Two types of drill bits, used in thr NCF, arethe roller bead and carbide insert.2. Start forward rotation by pushing the controllever toward the console.3. Push the drill lever toward the console to startthe drifter conclusion.4. Push the slow feed lever to collar the hole.Collaring should be carried out by alternately movingthe feed lever up and down until the bit has penetrated3 to 4 inches into solid rock.NOTE: Make sure the hole does NOT deflect fromthe desired hole direction.5. After a successful collar is made, push therotation lever and the blow lever all the way, then pushthe feed lever.NOTE: Speed of drilling and rotation is automaticaccording to the density of the rock formation. Theharder the rock, the faster the unit will drill. Use thecontrol lever for the desired speed.CAUTIONPay attention to the vibration of thehydraulic hose in the drill. If the hose vibratesabnormally, the accumulator of the drill is14-20
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