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Numa DCS6 Operation Manual

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DCS6
OPERATIONS MANUAL
Care & Maintenance Instructions
•
Do not discard this manual.
•
Keep manual readily available for reference during operation or when servicing product.
•
Before operation and maintenance, read and comprehend operations manual content.
•
Customer Service: 800.356.NUMA or 860.923.9551
•
Email: numa@numahammers.com
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Website: www.numahammers.com
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Mailing Address: P.O. Box 348, Thompson, CT 06277 USA
Patents: 6,883,618 7,442,074 10,612,310 11,085,242 EP 3 803 032 B1 KR-101340351 EP-2029325
CN-101448608 BR-P10711711 AU2007254317 AU2007254317 WO2007/136658
© 2024 Numa Tool Company. All Rights Reserved.

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  • Page 1 Email: numa@numahammers.com • Website: www.numahammers.com • Mailing Address: P.O. Box 348, Thompson, CT 06277 USA Patents: 6,883,618 7,442,074 10,612,310 11,085,242 EP 3 803 032 B1 KR-101340351 EP-2029325 CN-101448608 BR-P10711711 AU2007254317 AU2007254317 WO2007/136658 © 2024 Numa Tool Company. All Rights Reserved.

  • Page 3: Table Of Contents

    Hammer Assembly ..............13 Backhead / Feed Tube Assembly ........... 13 Piston Sleeve Insertion ............14 Section III Parts Identification ........... 16 DCS6 Exploded View ............... 16 Part Number Reference ............16 Section IV Air Consumption Charts ........17 Section V Lubrication ..............

  • Page 4: Limited Warranty

    If, during such warranty period, Buyer promptly notifies Numa in writing of any defect and establishes that the above warranty is not met, Numa shall either repair or replace the Product or credit the customer, as it deems necessary to meet the warranty.

  • Page 5: Section I Description

    DESCRIPTION GENERAL DESCRIPTION The DCS6 is a pneumatically operated tool designed to utilize QL6 6" to 8-1/2" (152 mm to 216 mm) diameter bits in rock formations under a wide range of operating conditions. The DCS6 hammer design incorporates a reversible, hardened case. The single bore design allows for a maximum bore diameter in conjunction with optimum life against abrasion.

  • Page 6: Functional Description

    The feed tube supplies the main air into the chambers located in the piston. It is connected to the backhead by the pin. The feed tube is designed with a long bearing surface to maintain alignment in the backhead. DCS6 Page 2 07/24/2024...

  • Page 7: Piston

    CHUCK The chuck threads into the bottom end of the case with double start threads. It has internal splines that mesh with the splines on the bit body to transmit rotation. DCS6 Page 3 07/24/2024...

  • Page 8: Section Ii Maintenance

    • is much easier than trying to do so after the drill has been removed from the drill rig. CAUTION USE CAUTION WHEN HANDLING DOWN THE HOLE HAMMER PARTS. NUMA HAMMER PARTS ARE MANUFACTURED FROM HARDENED, HEAT TREATED MATERIALS. DROPPING OR STRIKING THESE PARTS MAY CAUSE SEVERE DAMAGE.
  • Page 9 Using a screwdriver, remove the backhead bearing from the groove located on the • outside diameter. Remove the backhead o-ring from the backhead. • Remove the check valve and check valve spring from the backhead. • DCS6 Page 5 07/24/2024...

  • Page 10: Piston Sleeve Removal

    With your finger or screw driver pivot the removal tool as shown in figure 2-2B. Use the 1/2" rod to flip the removal tool to the vertical position, (refer to figure 2-2C). 1/2" Rod Push here to pivot opposite end of tool up Figure 2-2B DCS6 Page 6 07/24/2024...
  • Page 11 With the removal tool in the vertical position make sure the cut in the sleeve is at the • bottom or 6 o'clock and the removal tool is contacting both sides of the cut, (refer to figure 2-2D). Removal Tool on both sides of cut Cut in Sleeve Figure 2-2D DCS6 Page 7 07/24/2024...
  • Page 12 While keeping the rod against the removal tool as shown in figure 2-2E, use the rod to rotate the piston to a vertical position as shown in figure 2-2F. Rod shown against removal tool Figure 2-2E Piston rotated to a vertical position Figure 2-2F DCS6 Page 8 07/24/2024...
  • Page 13 Discard sleeve and replace with new sleeve. See page 14 for sleeve insertion. • CAUTION ALTHOUGH THE SLEEVE MAY APPEAR TO BE IN GOOD CONDITION, THE SLEEVE CANNOT BE REUSED ONCE IT IS REMOVED FROM THE PISTON. DCS6 Page 9 07/24/2024...

  • Page 14: Inspection

    FEED TUBE Inspect the outside diameter for nicks, burrs and scoring. • Inspect all makeup surfaces for indentations or nicks caused by wear. • Remove all minor irregularities with emery cloth. • Replace if necessary. • DCS6 Page 10 07/24/2024...
  • Page 15 Clearance between the piston and the case should not exceed .012" (.30 mm). • Select the larger diameter end of case to be the chuck end. Replace if the outside • diameter is worn to 5.150" (131 mm) or less near the chuck end. DCS6 Page 11 07/24/2024...
  • Page 16 THE BIT TO FAIL IN THIS AREA. Torsional play in the splines should not exceed .188" (4.8 mm). • Replace if necessary. • O-RINGS / BACKHEAD BEARING Inspect for damage such as cracks and deformations. • Replace if necessary. • DCS6 Page 12 07/24/2024...

  • Page 17: General Assembly

    Place the check valve and check valve spring in the backhead. • Using a rubber mallet, tap the feed tube into the backhead, aligning the hole on the • feed tube with the hole in the backhead. DCS6 Page 13 07/24/2024...

  • Page 18: Piston Sleeve Insertion

    Screw the backhead into the case. • CAUTION DUE TO CLOSE TOLERANCES BETWEEN THE DCS6 INTERNAL PARTS AND THE CASE, NUMA CAN NOT ACCEPT RESPONSIBILITY FOR DAMAGE CAUSED BY WELDING ON THE CASE OD. WELDING ON THE CASE CAN CREATE DISTORTION, CAUSE PREMATURE FAILURE AND VOID THE WARRANTY.
  • Page 19 (32 mm) rod and force the sleeve down through the insertion tool, small end bore of the piston (figure 2-7E) and into the undercut (figure 2-7F). Insertion Tool Piston - small end bore Piston - undercut Sleeve Figure 2-7E Figure 2-7F DCS6 Page 15 07/24/2024...

  • Page 20: Section Iii Parts Identification

    Bit Retaining Ring Feed Tube O-Ring 015952 (1) 005571 (1) Feed Tube O-Ring Bit Retaining Rings 005738 (1) 012902 (1) Reciprocating Sleeve 014042 (1) Chuck 012903 (1) Piston w/ Reciprocating Sleeve 019209 (1) Hammer Assembly #017882 Figure 3-1 DCS6 Page 16 07/24/2024...

  • Page 21: Section Iv Air Consumption Charts

    SECTION IV AIR CONSUMPTION CHARTS DCS6 DRILL PRESSURE (BAR) 13.6 20.4 27.6 34.5 2000 1800 1600 1400 1200 1000 94.4 DRILL PRESSURE (PSI) SOLID CHOKE 3/16 (4.8mm) CHOKE 1/8 (3.2mm) CHOKE 1/4 (6.4mm) CHOKE DCS6 Page 17 07/24/2024...

  • Page 22: Section V Lubrication

    As an alternative to Rock Drill Oil, Numa Enviro Lube provides continuous protection for the DCS6 when 3 oz. (.09 litres) are used every 300' (92 m) or four hours of drilling, whichever occurs first. Numa Enviro Lube is utilized in 3-1/2" to 6" hammers only.

  • Page 23: Section Vi Storage

    In addition, each rod (pin and box end) should be wiped clean and capped to prevent foreign contaminants from sticking to the connector ends. SHORT TERM STORAGE When the DCS6 hammer will be stored for only a short period of time the following steps should be taken: •...

  • Page 24: Restarting

    If any internal hammer parts have oxidized, use an emery cloth to polish each part. Wash each hammer part, wipe dry, relubricate with rock drill oil and reassemble the hammer. CAUTION FAILURE TO CHECK INTERNAL PARTS BEFORE RESTARTING THE HAMMER MAY CAUSE SERIOUS DAMAGE TO THE HAMMER. DCS6 Page 20 07/24/2024...

  • Page 25: Section Vii Button Bit Maintenance

    BUTTON BIT MAINTENANCE GENERAL Numa button bits are designed for fast penetration and long life. Keeping the carbide buttons sharp has a direct effect on both the penetration and the tool life. As the bit wears flat, spots develop on the carbide buttons. These flat spots increase stress on the buttons causing the bit to work harder, which may cause button failure.

  • Page 26: Section Viii Dcs6 Recommended Spares

    For Complete Hammer Assembly #017882 Table 8-1 NOTE Class 1 Represents a user of a DCS6 hammer that has readily available spare parts. Class 2 Represents a user of a DCS6 hammer that does not have readily available spare parts. DCS6 Page 22 07/24/2024...
  • Page 27 NOTES DCS6 Page 23 07/24/2024...
  • Page 28 NOTES DCS6 Page 24 07/24/2024...

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