General Assembly ..............11 Hammer Assembly ..............11 Backhead / Feed Tube Assembly ........12 Section III Parts Identification ........... 15 Patriot 180 Exploded View ............. 15 Part Number Reference ............15 Section IV Air Consumption Chart .......... 16 Section V Lubrication ..............
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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.
7 and 12 to facilitate the removal and the installation of the choke. The Patriot 180 hammer is a high performance tool which may require additional downfeed to maximize performance. Please contact your local Numa Representative for further details.
FUNCTIONAL DESCRIPTION BACKHEAD The backhead connects the hammer to the drill rod. It is threaded into the top end of the case with double start threads and into the drill rod with a standard 8-5/8 API REG thread. Wrench flats are provided for disassembling. The pin aligns the feed tube assembly into the backhead.
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PISTON The piston functions as the only moving part in the hammer, control ling the operational air cycle. The percussive action of the piston striking the bit transfers the energy through the bit in order to fracture rock formations. A snap ring inserted in the main bore prevents the piston from sliding out of the case when the chuck, bit, bit retaining rings and bit bearing are removed.
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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 the chuck. DRIVE PLATES The plastic drive plates provide wear protection for the splines. They are inserted between the chuck and the bit.
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If not possible, see hammer breakout drawing Figure 2-1. 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.
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Using an overhead crane or lift truck of appropriate capacity, place the hammer • horizontally on a hammer stand and secure the hammer in the wrench. The chuck end can be held by the 14-1/2" (368 mm) flats, in the wrench. The backhead is also held in the 14-1/2"...
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Removal of the bit bearing and snap ring from the chuck end of the case is not • necessary for routine maintenance. If necessary, locate the disassembly notch where the snap ring is located. Using a pry bar, pry the snap ring out of the groove, and remove from case.
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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. •...
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 •...
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. •...
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. •...
BACKHEAD / FEED TUBE ASSEMBLY Place the backhead on its side on the bench. Install the backhead o-ring into the • groove located on the outside thread diameter. Place the thrust washer over the backhead until it rests against the backhead shoulder. •...
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CAUTION DUE TO CLOSE TOLERANCES BETWEEN THE PATRIOT 180 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.
The Patriot 180 hammer requires a continuous supply of the correct type Rock Drill Oil. The Patriot 180 hammer consumes at least 10 quart (10 litres) of Rock Drill Oil per hour in order to maintain adequate lubrication. See table 5-1 for recommended Rock Drill Oil.
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.
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.
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.
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For Complete Hammer Assembly #015654 Table 8-1 NOTE Class 1 Represents a user of a Patriot 180 hammer that has readily available spare parts. Class 2 Represents a user of a Patriot 180 hammer that does not have readily available spare parts.
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