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Numa Patriot 125 Care & Maintenance Instructions

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P.O. Box 348 • 646 Thompson Road • Thompson, CT 06277 USA
US Toll Free: (800) 356-NUMA • Tel: (860) 923-9551 • Fax: (860) 923-2617
E-mail: numa@numahammers.com
Website: www.numahammers.com
©2023 Numa All Rights Reserved
Patents 4,530,408 4,919,221 4,962,822 5,205,363 5,984,021 5,992,537 6,021,856 7,422,074

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  • Page 1 P.O. Box 348 • 646 Thompson Road • Thompson, CT 06277 USA US Toll Free: (800) 356-NUMA • Tel: (860) 923-9551 • Fax: (860) 923-2617 E-mail: numa@numahammers.com Website: www.numahammers.com ©2023 Numa All Rights Reserved Patents 4,530,408 4,919,221 4,962,822 5,205,363 5,984,021 5,992,537 6,021,856 7,422,074...

  • Page 3: Table Of Contents

    Section IV Air Consumption Chart ..........15 Section V Lubrication ................16 Section VI Storage ................17 Short Term ..................17 Long Term ..................17 Restarting ..................18 Section VII Button Bit Maintenance ..........19 General ...................19 Sharpening ..................19 Section VIII Patriot 125/125HD Recommended Spares ..20 Patriot 125/125HD ...
  • Page 4 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

    The Patriot 125/125HD is a valveless, pneumatically operated tool designed to utilize Numa 12-1/4" to 20" (311 mm to 508 mm) diameter bits in rock formations under a wide range of operating conditions. The Patriot 125HD utilizes bits from 13" to 20" (331 mm to 508 mm).

  • Page 6: Functional Description

    FUNCTIONAL DESCRIPTION BACKHEAD The backhead connects the hammer to the drill rod. It is threaded into the top end of the case with single start threads and into the drill rod with a standard 6-5/8" API REG thread. Wrench flats are provided for disassembling. A 11-3/4" (298 mm) HD backhead is available as an optional extra.

  • Page 7: Case

    CASE The case is designed to contain the internal parts which make up the hammer assembly. The case is non-reversible and hardened to resist wear and to extend life in abrasive conditions. A 11-3/4" (298 mm) OD HD case is also available as an optional extra.

  • Page 8: Chuck

    CHUCK The chuck threads into the bottom end of the case. It has internal splines that mesh with the splines on the bit body to transmit rotation. A 11-3/4" (298 mm) HD chuck is available as an optional extra. CHUCK BUSHING The chuck bushing is a nylon insert located in the bottom end of the chuck to provide a bearing surface between the lower bit shank and chuck.

  • Page 9: Section Ii Maintenance

    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. STRIKING THE HAMMER PARTS WITH HAMMERS, CROWBARS OR LIKE INSTRUMENTS WILL VOID THE WARRANTY.
  • Page 10 CAUTION THE ACCEPTABLE CLAMPING AREAS START 8" (203 MM) FROM EITHER CASE END, TO AN ADDITIONAL 5" (127 MM) BEYOND THIS POINT. PLACING THE CHAIN VISE ON THE AREA OF THE CASE WHERE THE PISTON CYCLES CAN DISTORT THE CASE, RESTRICT PISTON MOVEMENT AND VOID THE WARRANTY.
  • Page 11 To disassemble the backhead / feed tube assembly, stand the backhead / feed tube • assembly on a bench, with the API thread facing down. Using a drift pin, tap the pin out of the backhead/feed tube assembly. • Lift the feed tube assembly out of the backhead. •...

  • Page 12: Inspection

    INSPECTION All parts should be washed in a clean solvent before they are inspected and • reassembled. WARNING USE CLEANING FLUIDS THAT ARE NONFLAMMABLE AND AVOID BREATHING THE FLUID VAPORS. Handle all parts carefully, hardened parts may chip if dropped on a hard surface. •...
  • Page 13 SNAP RING Inspect the snap ring for severe wear indications. • Remove or round over any sharp edges. • Replace if necessary. • PISTON Inspect the striking face, inside and outside diameters for nicks, scoring and cracks. • Polish the piston with emery cloth to remove all minor irregularities, cracked pistons •...
  • Page 14 BIT RETAINING RINGS Inspect for cracks or deformations. • Remove all irregularities with a file or emery cloth. • Replace if necessary. • CHUCK Inspect the chuck bushing for cracks or irregularities. Replace if necessary. • Inspect for cracks and burrs. •...

  • Page 15: General Assembly

    GENERAL ASSEMBLY INSTRUCTIONS Assembly should be performed in a clean environment. • All parts should be cleaned thoroughly and wiped dry before assembly. • Oil all parts by hand using Rock Drill Oil to insure easy assembly. • Coat all thread connections with a thread compound to allow joints to thread easily. •...

  • Page 16: Backhead / Feed Tube Assembly

    BACKHEAD / FEED TUBE ASSEMBLY Place the backhead on the bench with the API threads facing down. Install the • backhead o-rings into the grooves located on the thread diameter. Place the check valve and check valve spring in the backhead. •...
  • Page 17 CAUTION DUE TO CLOSE TOLERANCES BETWEEN THE PATRIOT 125/125HD 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. CONTACT NUMA FOR SPECIAL INSTRUCTIONS IF WELDING THE CASE BECOMES UNAVOIDABLE.

  • Page 18: Section Iii Parts Identification

    SECTION III PARTS IDENTIFICATION EXPLODED VIEW Backhead 6-5/8 Reg Pin 015966 (1) 016108 (1) - HD Backhead O-Ring 005867 (2) Case 011969 (1) 011408 (1) - HD 015904 (1) Snap Ring Thrust Washer - Brass 008172 (1) 015155 (1) 011412 (2) - HD Check Valve Bit Bearing 018121 (1)

  • Page 19: Section Iv Air Consumption Chart

    SECTION IV AIR CONSUMPTION CHART PATRIOT 125 DRILL PRESSURE (BAR) 10.3 13.6 17.2 20.4 24.1 4800 2265 1888 4000 1512 3200 1132 2400 1600 DRILL PRESSURE (PSI) 3/8 (9.5mm) CHOKE SOLID CHOKE 1/4 (6.4mm) CHOKE 1/2 (12.7mm) CHOKE * Operation Above 250 PSI (17 BAR) Is Not Recommended.

  • Page 20: Section V Lubrication

    The Patriot 125/125HD hammer requires a continuous supply of the correct type Rock Drill Oil. The Patriot 125/125HD hammer consumes at least 5 quarts (5 litres) of Rock Drill Oil per hour in order to maintain adequate lubrication. See table 5-1 for recommended Rock Drill Oil.

  • Page 21: Section Vi Storage

    SECTION VI STORAGE When storing a Patriot hammer, it is important to take the necessary steps in order to insure a smooth operation after restarting. When the hole is completed and the hammer is to be inactive for several weeks or longer the following steps should be followed: Each drill rod should be blown clear of all water.

  • Page 22: Restarting

    Lubricate all the internal parts with Rock Drill Oil. See table 5-1 on page 16 for suitable • Rock Drill Oils. Cap the backhead and chuck ends. • Store the hammer horizontally in a dry environment. • RESTARTING Before restarting the hammer after prolonged periods of inactivity, disassemble and inspect all internal hammer parts.

  • Page 23: 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 24: Section Viii Patriot 125/125Hd Recommended Spares

    SECTION VIII RECOMMENDED SPARES PATRIOT 125/125HD Product Description Part Number Class 1 Class 2 Backhead 6-5/8 Reg Pin 015966 Backhead O-Ring 005867 Thrust Washer Backhead End - Brass 015155 015904 Check Valve 018121 Check Valve Spring 018122 Feed Tube Assembly...
  • Page 25 CFSR #015971 / NTR #018690 / HD #016107 Table 8-1 NOTE Class 1 Represents a user of a Patriot 125/125HD hammer that has readily available spare parts. Class 2 Represents a user of a Patriot 125/125HD hammer that does not have readily available spare parts.
  • Page 26 NOTES Patriot 125/125HD Page 22 02/09/23 ...
  • Page 27 NOTES Patriot 125/125HD 02/09/23 Page 23 ...

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Patriot 125hd

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