Mincon HDD60 Service Manual
Contents
1. Copyright Mincon 2010 All Rights Reserved Leaders im the Figld of Drilling Treenhnnotogy PA TADE Or ON gi on nee ne ene nnn TE ME 2 de ANGIE OCU UON RTT E 3 2 Installation and ODSrFallO e es peti eor sens 4 2M ASALCLY saci sees wick Seis a a eee 4 2 2 Set up of HDD60 Hammer and Sonde 4 2 2 1 SOGO RE M 4 2 2 2 OTIS OF SOMOS m MR RE Re ee bd ide ie AIN NA Ne 4 22 21 Installation ol DG SOL dans dias san leute iuto nee tas teens Puce MADE Cor LED deu 4 22 22 Tastallatiorrol SUD SIGE SONO cute nee EE DMeRO diese ea ep hs tubes adiutus ce SE bate dede s bar datus 8 2 2 3 PAS TA AU ONION o ponte eg ipsa on cere nde 9 2 9 Oetup and Operation of Support Station eiii eed exisse d exei adeo va ev ed exe Oda d adus 10 2 3 1 Se UD Of SUPPO SIAN OV EE 11 2 3 2 Equipment Inspection Prior to Compressor Ignition sse sese eene nnne nhan nnn nana 13 2 3 3 Press re Regulator Adjustment S ride en enr be nier 14 2 3 4 ON PAOIUS MENT AA ART RDA ie taal eras aA uA A ees 14 2 3 5 Water Pump Adjustment and Operation sise 14 2 3 6 COMMISSIONING OF HAMIMET nan amendes side oise a sation tente 15 2 3 7 EUDNCAN OW EEE EE 15 2 3 8 Operation Ham e 15 2d OVI EREE E EE E OE E E E ee 17 2 4 1 COR EN D eee ele Dee a T TA TERRE 17 2 4 2 OpenING Chack ang Backlieag uiu oio SR M NN e2. 0 MHS42TORO I MHSAD CGO a MHSSOISRO 17 CHOKE MB506CH01 CHOKE 1 8 3 2mm MB506CH02 CHOKE 3 16 4 8mm MB506CH03 2 MD4220R0 m MHDATIWSOZ s Mincon Leaders in Rock Drilling Technology Page 20 Leaders TR the Field of Drilling Preehnatogy RA 3 2 HDD60 Hammer Service Log New Dimension As Measured Wear Actual Actual Clearance Discard Clearance Wearsleeve 3 930 99 84mm Cho CA CAL gt 0 010 0 25mm isto OD E i sol zc MER end New Dimension As Measured Wear Actual Actual Clearance Discard Clearance Isto B EE lee Pat New Dimension As Measured Wear Actual Clearance Discard Clearance C D gt 0 010 0 25mm Piston ID 8 1256 eicomm fof e Pat sd New Dimension As Measured Replace dimension Aligner ID Unscalloped A 3 018 76 65mm 3 627 92 13mm End Bit Bearing Surface OD 3 006 0 002 Note The head of the bit should wear out before the bearing 76 35 0 05mm surface does Scalloped end SEL 1 Wearsleeve Reverse Dimension 4 570 116 0mm EE Ns UU Wearsleeve Discard Dimension 4409 iiBOmm SSS Note Chuck should be replaced when wear transfers to wearsleeve L B agers Ih the Figld oT Drilling Preennotogy PA 4 Warranty Mincon Hardrock Directional Drilling Hammers Warranty January 2005 Mincon warrants that the Mincon Hardrock Directional Drilling Systems and spare parts therefore manufactured by M
3. negligence warranty indemnity or otherwise shall not exceed the purchase price of the product upon which such liability is based Mincon and its distributors shall in no event be liable to any party relating to this sale for any consequential indirect special or punitive damages arising out of this sale or any breach thereof or any defects in or failure of or malfunction of the Mincon DTH Hammer or spare parts Warranty will be voided where There is evidence of damage resulting from insufficient or incorrect lubrication There is evidence of misuse through the application of heat welding or of being struck There is evidence of distortion or bending however caused There is damage caused as a result of using incorrect servicing tools or procedures If it is evident that the hammer or its components have achieved a reasonable proportion of their anticipated life
4. Pin The pin is in the Insert and screw the Sonde Housing Backhead in place Bent Sub set so that the Sonde will be aligned correctly in the twelve O clock position Mincon Leaders in Rock Drilling Technology Page 7 Leaders in the Field of Drilling Technology M 2 2 2 2 Installation of Sub Sight Sonde The procedure for installing a Sub Sight Sonde is the same as the DCI Sonde except Step 3 through Step 7 are replaced with the following Above picture shows the end of the Sub All screws to be inserted should have Fit the first half of the Sub Sight adaptor to Sight Sonde that will receive the Sub Sight the threads coated with a thread lock the Sonde and tighten Locating adaptor compound Fit the top section of the Sub Sight Unscrew the other end off the Subsight and replace with the Adaptor end cap shown above Once completed the Sonde assembly can be installed from Step 8 above Fit the second half of the Sub Sight adaptor to the Sonde and tighten Then fit locating assembly and tighten the assembly locking screw as shown above Mincon Leaders in Rock Drilling Technology Page 8 Leaders in the Field of Drilling Technology RA 2 2 3 Installation of Bit The following sequence of instructions is used to correctly fit the bit in the correct orientation for drilling Remove Bit Retaining Ring from the hammer and screw the Chuck back in place Align these TE carbide Insert the bit int
5. ground conditions may cause binding within the hole with the added risk of the hammer and drill string becoming jammed Any excessive pullback forces or high rotation speeds used in an attempt to recover the drill string may generate heat zones around the hammer which may alter the metallurgy of the components to cause damage and ultimate failure You are strongly advised not to pour diesel into the hammer as this may create an internal combustive effect and will damage the hammer and its components Any heat induced failures are not covered by our terms of warranty Before adding a drill rod make sure that the threads are clean and well greased and that there are no contaminants likely to enter the hammer to cause damage and early wear Proper drill guides and break out systems must be used which suit the diameter of the hammer All tools and spanners used for the drill bit and break out flats must fit properly Make certain that the hammer is stationary when applying spanner or breakout tools Do not rotate the hammer with a spanner attached to the drill string unless it is safely captivated within the breakout clamp The Air Consumption of the hammer is as per the chart below The chart represents operating pressure and equivalent air consumption at sea level with an ambient temperature of 68 F 20 C OPERATING PRESSURE AIR CONSUMPTION Air Volume M MIN 11 3 14 0 17 0 19 8 22 6 25 5 28 3 31 1 34 0 500 34 5 2 ciim Q 2 4
6. 00 27 6 5 i 7 7 300 E 20 7 LT 2 D 200 Ds 13 8 E A D pt c m Ro a m t 400 500 600 roo B00 900 1000 1100 1200 Air Volume SCFM Full Choke 1 4 Choke 3 76 Choke Leaders in the Field o f EL ene Technoloauwv P i Both temperature and altitude have an effect on air and consequently on compressed air Higher temperatures and higher altitudes result in air becoming thinner less dense and the effect of this is a reduction in a compressor s delivery pressure The table below shows just how much operating pressure can be affected by these two factors For example if we take a compressor which will deliver 1000 cfm at sea level this same compressor will only deliver 745 cfm at 9 000ft given a temperature of 40 degrees Fahrenheit 4 4 degrees Celsius zm o ars oss oss ose 1o60 1 142 1284 1299 1443 1562 0 0976 2 4 Servicing 2 4 1 General Dismantling the Hammer for servicing or to change the bit can be made easier if the chuck threads are regularly greased and the backhead threads are well greased any time the hammer is opened for servicing We recommend that a good quality thread grease be used and in acidic conditions we do not recommend copper based greases as this can trigger a galvanic reaction with corrosive effect to damage the root of the threads and cause failure 2 4 2 Opening Chuck and Backhead The threads used in Mincon Hammers ar
7. at fingers do not get caught between the wear sleeve and the piston Place the three piece seating ring on the inner cylinder and secure in place with the seating ring O Ring Insert The Air distributor into the inner cylinder at the seating ring end and using a soft headed mallet tap it into place so that it seats up against the top of the inner cylinder Place the inner cylinder assembly into the wear sleeve and tap down with a soft headed mallet When beginning to hit the assembly ensure that it goes in square Using a steel dolly on top of the air distributor and inside the wear sleeve drive the assembly into place with a sledgehammer Place the lock ring in on top of the air distributor and then the Steel Makeup Ring on top of that Insert the spring and check valve in place and finally screw the backhead in place With the backhead in place there should be a small gap between the backhead and the wearsleeve This gap should be between 0 015 and 0 030 and can be measured using a feeler gauge If the gap is less than the minimum then the lock ring will need to be replaced Protect the hammer as earlier described by internal lubrication Leaders in the Field of Drilling Technology RA 3 Appendix 3 1 HDD60 exploded view and Parts List a MINCON HDD60 PARTS LIST AND 1 SPECIFICATIONS mon one HAMMER MHDADIASD SONDEHOUSINGASSEMBLY MHS401AS01 2 j MHS4210RO WHS42IORO 7 MHS408SLO MHS421ORD MHS4O4SO
8. ator Adjustment On a new support station the pressure regulator needs to be set at 80 PSI To adjust the pressure after the walk around inspection and the compressor is operational turn the Air Discharge Valve Valve to Drill 2 ball valve off Turn electric valve on green light on this will pressurize the system Adjust the regulator clockwise to turn air pressure up and counter clockwise to turn pressure down Set pressure gauge to 80 PSI After adjustment turn electric valve off red light and turn Air Discharge Valve on handle parallel to the valve body CAUTION Operating at higher pressures may cause motor to develop an air lock and stop operating 2 3 4 Oiler Adjustment The amount of oil is dependent on where the needle valve is set The needle valve is located on the far left as shown here Turning the valve counter clockwise provides more oil and clockwise gives less oil A good Starting point is to close the valve fully and then turn one and a half revolutions to the counter clockwise The two valves located on the control panel see photo are how you turn the oiler on and off During drilling the two valves should be ON When not drilling turn valves OFF CAUTION At the end of the day turn the valves off or you will be wasting oil The oiler will continue to oil whether compressor is on or off It is recommended that on a new system until the operator is familiar with the system that after each rod is drilled down c
9. e picture shows air discharge side of support station Leaders in the Field oT Drilling T chnu uology Connect air hose to the compressor in the Hook TRI light controller Before Operation check level of oil in the same manner Connect other air hose to connections to electric valve water pump fill cap with dip stick Support Station discharge line and to Drill also using the same procedure Always follow these instructions when filling tank with rock drill oil 1 Turn compressor off and shut valve off at compressor 2 Turn electric valve off make sure you see a red light on the Tri Lite Controller and Red or Yellow indicator on the top of valve is pointing perpendicular to valve body 3 Open vent valve Labelled 1 Vent Valve above lower right hand control knob relieving air pressure inside of tank to atmospheric air pressure 4 After air has bled out of tank use hammer to hit four inch hammer fitting on top of tank counter clockwise to loosen and then take off by hand 5 Fill oil to top of tank but not past fitting in the middle of the neck 6 Refit Oil tank cap and tighten using a hammer Always make sure 4 cap is tight on tank and vent valve is closed before starting compressor 2 3 2 ing Technology RA Equipment Inspection Prior to Compressor Ignition CAUTION The following walk around check should be carried out prior to starting the compressor Specific Equipment Hose con
10. e right hand threads Proper tools and break out systems should be used at all times to dismantle HDD hammers otherwise damage may be caused to the components which could result in eventual failure or affect the performance of the Hammer When using Petol wrenches or similar systems ensure that the wrench is not placed on the threaded section of the wear sleeve Petol wrench jaws should be carbide and in good condition It is good practice to keep a spare set of jaws with the rig Do not strike or hit the outer components as this could weaken the heat treated steels Hitting the hammer may also cause hard metal fragments to be chipped off which may be projected and cause personal injury or eyesight loss Do not apply heat to the hammer as this can alter the metallurgical composition and result in premature failure Additionally applying heat can also cause distortion to the wear sleeve which in turn would lead to failure Do not trap the hammer under drill rig tracks or Leaders im the Field oT Drilling Treennotogy PA vehicle wheels which could cause bending and distortion of the hammer body Failures caused by these actions cannot be supported by warranty Take care when dismantling the hammer to make sure that parts and drill bits do not become detached and cause damage or personal injury 2 4 3 Dismantling Hammer to Change Drill Bit When possible dismantling the Hammer to change the drill bit is preferably best done in a workshop envi
11. g in clay Check the in line filter on the pump periodically for debris In colder conditions antifreeze the pump and drain the 40 foot water hose and clean and empty the in line filter to protect from freezing while not operating the drill Mincon Leaders in Rock Drilling Technology Page 14 L Qavgers fr the Figld of Drilling Pr s ral og y RA 2 3 6 Commissioning of Hammer Coat the drill bit shank and the hammer threads with grease for protection and easier dismantling Prior to use lubricate the hammer with 1 2 pint 4 litre of rock drill oil as described above Fit the hammer to the drilling rig ensuring no debris or dirt enters the hammer from the site dirty tubes or from unclean air lines Make sure that the coupling threads from the drill are of the same specification to that of the hammer and they are in good condition Run the hammer at half the air flow for a few minutes to allow the oil to flow through and for internal components to settle in 2 3 7 Lubrication It is vital for HDD hammers to receive a constant supply of proper rock drill oil to protect the internal components and to provide a good air seal between the piston and the inner cylinder and the piston and the wear sleeve for efficient drilling The correct consumption of oil is dependent upon the air volume and conditions Please refer to the lubrication graph below for recommendations When drilling in wet conditions the normal amount should be doubled There s
12. he oil should be poured into the top of the hammer and let flow down into the piston chamber of the hammer to coat the parts and protect them from rust and corrosion Once completed the bent sub and the Sonde Housing can be reinstalled Ensure that the thread protector and chuck cap are fitted to keep debris out and to prevent oil leakage Store the hammer horizontally in a clean dry place 222 Setup of Sonde When the HDD60 is supplied it will contain the necessary parts for the successful installation of a commercial Sonde The two main types of Sonde are dealt with in this manual DCI Sonde and Sub Sight 2 2 2 1 Installation of DCI Sonde The following series of picture will detail the installation of a DCI Sonde into the HDD60 The same procedure should be used for servicing or changing the Sonde at a later date gt r II Qi STEP 1 STEP 2 Unscrew and remove Sonde Housing Backhead from the Insert and screw the Sonde Line Up Tool into the Sonde Sonde Housing Sleeve Carriage retrieval cap and pull out the complete Sonde Carriage assembly Mincon Leaders in Rock Drilling Technology Page 4 Leaders in the Field of Drilling Technology v T j j 10 ap mii L Step 3 Unscrew and remove the Sonde Carriage Locating Cap Loosen and remove with the Torque Wrench the DCI Adaptor Springs and the DCI Adapter from the Sonde Carriage At Locating cap from the tube The correct end has loca
13. hould be visual evidence of oil around the drill bit shank and within the tube joints when changing tubes Litres Hour Pressure Bar 0 5 1 1 5 2 0 2 5 6 9 13 8 20 7 27 6 34 5 120 100 Air Volume CFM NIIN ZIN SUNIOA Aly Ambient Temperature F s 9e1njeueduue 1ueiquiy 100 200 300 400 Pressure PSI US Pints Hour In wet drilling above 2gpm 8 lpm the oil consumption should be doubled The recommended grade of oil is dependent on the ambient temperature in which drilling is taking place as well as the operating pressure As a rule of thumb 180320 grade rock drill oil should be used whenever possible as the hammer is a high frequency tool however where the pump cannot pump the oil in colder conditions a lower grade of oil can be used as per the graph above Remember Insufficient lubrication or incorrect lubrication grades may result in damage being caused to the hammer and its components Hydraulic oils engine oils gear oils and diesel are not recommended for lubricating HDD hammers 2 3 8 Operation of Hammer Be sure to familiarize yourself with the controls of the machine and work in accordance with the manufacturers recommendations The percussive mechanism begins to operate as the air supply is turned on and when the drill bit is pushed firmly into the hammer Excessive thrust pressures are not needed to make it work The thrust cont
14. i ni 17 2 4 3 Dismantling Hammer to Change Drill Bit sees ss 18 2 4 4 Disassembly TOF dU E Servi IT MANI RES tta dunt td beue ot tee anses anis Cu ei NDS DO Uo 18 2 4 5 INSPECCION LT een dinar 18 2 4 6 GHeckItigWVear EITHES nn ne een ee ser ua qu out O A TUNE ue RA 18 2 4 7 FICAS SCIOIY Rr REPE 18 S ADENO e T nee te ee eee eee ee ee eee een ee eee HE 20 3 1 HDD60 exploded view and Parts List 20 32 MDD Hammer Serv iC Gil OG siderite LES di ns ass nn ns Nr nn 21 Be NUR GANA MEE UE 22 1 the Field of Drilling Technology ra Introduction This document covers the HDD60 Horizontal Directional Drilling System The system consists of the following HDD60 Horizontal Directional Hammer Support Station The basic setup is shown below Horizontal Directional Drill Including but not limited to Astec DD4045 DD 6 DD8 AUDD9014 Ditch Witch JT4020 M1 7020 JT100 Vermeer 36X50 80X100 100X120 Water Truck Support Pack Compressor Dust Control Rock Drill Oil Injection Minimum 275 PSI Sonde Cooling Water injection 2 4 Gal Min Compressor to Drill adapter The Installation and Operation section will deal with setup of the system and basic operation Following that we will deal with disassembly and servicing When dealing with the HDD60 in the service section we will separate it into two parts Firstly the Horizontal Directional Drilling hammer component that makes drilling possible and secondly the Sonde h
15. incon and delivered to the initial user to be free of defects in materials or workmanship for a period of 3 months after initial operation or 6 months from the date of shipment to the initial user whichever occurs first Mincon may elect to repair the defective part or issue full or partial credit towards the purchase of a new part The extent of credit issued will be determined on a pro rata basis bearing in mind the service life of the defective part against the normal service life of that part The part will be replaced or repaired without charge to the initial user at the place of business of an authorized Mincon distributor during normal working hours The user must present proof of purchase at the time of exercising the warranty The warranty applies only to failures resulting from defects in the material or workmanship and does not apply to failures occurring as a result of abuse misuse corrosion erosion negligent repairs and normal wear and tear Failure to follow recommended operating and maintenance procedures which result in component failure will not be considered for warranty This warranty is in lieu of all other warranties other than title expressed or implied Limitation of Liability Mincon will not accept any remedies to the user other than those set out under the provisions of warranty above The total liability of Mincon or its distributors with respect to the sale of DTH Hammers or spare parts therefore whether based on contract
16. ite often micro cracking has occurred on the piston In these cases the piston should be replaced if there is evidence of such cracking Check the strike face of the piston for cracking or damage 2 4 6 Checking Wear Limits The performance of the hammer is dependent on the amount of wear the critical components have These should be measured and recorded in the Service log in the appendix The service log gives the location of where measurements should be made Depending on how many parts need to be replaced it may be economical to replace the hammer all together 2 4 7 Reassembly The hammer can be reassembled in the following manner referring to the exploded view of the hammer in the appendix Ensure all components are liberally coated with good quality rock drill oil and threads with thread grease After identifying which end will be the chuck end fit the piston retaining ring over the aligner Stand the wear sleeve up with the chuck end to the top and push the aligner in as far as it will go by hand Using a steel dolly that fits into the wear sleeve and over the aligner Leaders im the Field oT Drilling PlCecnuoiogwy PA hit the aligner into place with a sledgehammer Place the bit retaining rings in on top of the aligner and screw the chuck in place If the chuck does not close up fully the aligner is not in fully Turn wear sleeve over with the chuck on the floor and drop the piston in with the strike face in first Again ensure th
17. necting Drill to Support Station Hose connecting compressor to Support Station Inlet and Outlet Valve Connections Inlet and outlet valves on Support Station Whip Checks Hose to compressor connection Hose to compressor connection Whip Check Hose to Drill connection Hose to Drill connection Whip Check 4 Wing Nut on top of Rock Drill Oil Tank Rock Drill Oil Tank Vent Valve Main Air Discharge valve 2 Valve to Drill Power Connections for Tri Lite Controller Tri Lite Controller Valve Operation Tri Lite Controller Valve Required State Complaint RED Air flow arrow goes to Drill Hose connected to outlet valve Connected at electric inlet valve Wing nuts tightened using hammer turning clockwise Connected correctly as described in above sections Wing nuts tightened using hammer turning clockwise Connected correctly as described in above sections Wing nuts tightened using hammer turning clockwise Connected correctly as described in above sections Tightened using hammer turning clockwise Closed knob pointing to up as in Photo Open Parallel to Valve Body Connected to 12V Battery Black to NEGATIVE and Red to POSITIVE Operating correctly Red light means air off Valve closed Green light air on Valve Open Red light air off Valve closed prior to starting compressor Lemeuauers kh the Field of Drilling Pr s hat og y Ma 2 3 3 Pressure Regul
18. o the Chuck so that the Bent Sub wear carbides are aligned in a straight line with the three bit wear carbides as illustrated above Mincon Leaders in Rock Drilling Technology Page 9 Leaders Ih the Field of Drilling Te enhnology Step 4 Step 5 Unscrew the Chuck and Bit from the hammer making sure that Place the Bit Retaining Rings onto the bit below the bearing the bit does not come out of the Chuck surface secured by O Ring Step 6 Screw the Chuck Bit and Bit Retaining Rings in place 2 3 Setup and Operation of Support Station Prior to operation the Support Station must be setup to ensure that correct and safe operation of the equipment is carried out For safe working conditions during operation of the equipment it is essential to have received the appropriate training prior to starting up the equipment Leaders in the Field of Drilling Technology PA 2 3 1 Set up of Support Station Water Hose Step 1 TRI Eite Valve Controller Unpack Support Station and check to make sure all components are present Support Station comes delivered with whip Connect air hose to Support Station air checks in place on both the air intake and intake valve discharge lines Enlarge loop on the other end of the whip check on the air intake valve end and loop over air hose and release When completed pull whip checks back so that they are as shown above Abov
19. ousing component that makes steering possible Leaders in the Field of Drilling Technology PA 2 Installation and Operation 2 1 Safety Be sure to work safely at all times Wear protective clothing and safety equipment and observe all safety regulations as prescribed by your employer Government or the site on which you work Do not wear loose clothing that may get caught in rotating parts and cause serious personal injury Remember that a Horizontal Down the Hole percussive hammer emits noise and you should therefore take every precaution to safeguard your hearing against damage by using proper ear protectors Use eye protection at all times Rock chips and dust which may be discharged from the face of the bit or bore hole at high velocities and can cause severe injury Hammers can be heavy Always use proper and approved lifting equipment and take every precaution to safeguard yourself against injury Keep hands clear at all times Beware of getting fingers trapped between the chuck and bit and do not use hands or feet to clear the top of the borehole at any time Other safety advice is given throughout this document which you are advised to read 2 2 Set up of HDD60 Hammer and Sonde 2 2 1 Storage If you intend to store the HDD60 Hammer we recommend that 1 2 pint litre of good quality rock drill oil be poured into the hammer to protect it To do this the hammer section should be unscrewed from the Bent Sub and then t
20. rols on the drill should be adjusted to the correct pressure and should be readjusted to take account of the weight of any extra tubes added so that the thrust pressure remains constant and not excessive Insufficient thrust pressure will make the hammer drill erratically and less efficiently and cause premature wear to the bit and chuck splines with likely damage to the hammer components and threads When the hammer is lifted from the rock face the drill bit extends from the chuck and the percussive action ceases Extra air will pass through the hammer which can be used to flush the hole clean Leaders inm the Field of Drilling Teehnoalogdgy RA Rotation speeds should not be too high and should be selected to suit drilling conditions and drill bit diameters High rotation speeds do not provide fast drilling and can cause premature wear of drill bits hammers and tubes Too slow a rotation speed can cause binding in the borehole and damage to drill bit inserts The controls of the drill should be adjusted in order to provide the largest drill chip size with the smoothest rotation and feed characteristics Recommended rotation speeds would normally vary between 25 35 R P M for most applications Where big diameter drill bits are used or when drilling in hard abrasive rocks slower rotation speeds are recommended Conversely in soft non abrasive rock a slightly faster rotation speed may be selected to produce more satisfactory results Some
21. ronment to avoid the risk of injury and for cleanliness Be careful to ensure that the drill bit and chuck are fully supported together so that there is no risk of them becoming detached and causing injury This can occur if the O Ring on the bit retaining rings is missing or damaged Before fitting a new drill bit visually inspect the splines of the chuck and the piston striking face to ensure that both are not damaged in any way Fit new bit as described in section 2 2 3 above 2 4 4 Disassembly for Full Servicing of Hammer Breakout the Chuck and Backhead as described previously Unscrew chuck and remove bit and bit retaining rings Unscrew the backhead and check to see if the check valve and spring are operating correctly and then remove them Mark one end to identify either the chuck or backhead end for reassembly latter Stand hammer up with the chuck end uppermost Using a mild steel bar tap the strike face of the piston to remove the air distributor and inner cylinder The steel make up ring and lock ring should fall out during this process if so remove them and continue until the top of the air distributor is at the top of the wear sleeve The hammer can now be placed flat on the ground or put up onto a suitable vice and using the mild steel bar hit the piston strike face from the chuck end to completely remove the air distributor inner cylinder and piston Stand the wear sleeve up with the chuck end on the ground Invert the piston and d
22. rop into the wear sleeve so that it is upside down Take care to ensure that fingers do not get caught between the piston and wear sleeve Again stand the hammer up with the backhead end uppermost and tap the piston strike face with the mild steel bar to remove the aligner A number of blows may be necessary as the aligner and wear sleeve are an interference fit The piston retaining ring will come out with the aligner 2 4 5 Inspection Prior to inspection thoroughly clean all parts using a suitable cleaning agent Diesel is not recommended for cleaning as it can cause erosion to components and damage to health All parts should be visually inspected for any signs of damage wear or cracking The inner cylinder wear sleeve and lock rings can be checked for unseen cracking by suspending them and lightly tapping with a screw driver If they emit a ringing tone then they should be sound However a dull flat tone if emitted may indicate cracking and the part should be replaced Take particular care to check the internal bore of the wearsleeve for pick up marks and galling If these are present the barrel of the wear sleeve should be honed out using a hand hone to remove them Inspect surface of the piston for pick up marks and galling usually caused through poor lubrication or the presence of contaminants and smooth out with emery paper or a hand held grit stone Where galling of the piston has occurred substantial heat has been generated and qu
23. ting Opposite end to the Sonde Carriage retrieval cap dimple Step 5 Step 6 Insert and push the DCI Sonde into the tube Fit the DCI Adaptor Locating cap onto the DCI Sonde ensuring the Locating cap s intrical key is seated correctly in the Sonde Keyway Mincon Leaders in Rock Drilling Technology Page 5 ik the Field of Drilling Te amp schnology Step 7 Step 9 Step 10 Push the Sonde in the rest of the way Insert first spring into the Insert the DCI Adaptor into Insert the second spring in to and screw the DCI Adaptor Locating Sonde Carriage the Sonde Carriage the Sonde Carriage Cap in and tighten snugly with the Torque wrench DCI Adaptor Locating Dimple Locating wes Align the Sonde Carriage Locating Cap Push the Sonde carriage into the Sonde Screw the Retrieval bar into the Sonde Groove with the DCI Adaptor Locking Dimple Housing Sleeve with the Sonde Carriage Carriage and push forward until it stops and push the cap on so that the hex socket Locating cap entering first Turn gently until you feel the Sonde of the Carriage Locating Cap fits over the Carriage go forward and the Sonde DCI Adaptor and then screw the Carriage Carriage Locking Cap groove seats Locking Cap in place over the Sonde Carriage Locating pin See Step 14 for details of the pin Mincon Leaders in Rock Drilling Technology Page 6 Leaders in the Field of Drilling Technology Above picture shows the Sonde Carriage Locating
24. up or two ounces of rock drill oil be poured in each rod especially if a new hammer is being commissioned 2 3 5 Water Pump Adjustment and Operation Always prime water hose before hooking the cam lock to the pump It is essential to have the water tank above the support station to maintain sufficient head pressure for the pump to operate The amount of water being introduced into the drilling operation is controlled by turning the knob labelled water on front panel to desired amount of flow The amount of water required to maintain a clean hole will be dependent on the drilling conditions Approximately 3 4 gallons per minute will suffice however in softer rock conditions more water may be required and significantly harder conditions will require less Once the optimal water injection is set the water will turn off when the operator turns off the main air supply to the drill and conversely turn on when the main air supply is turned on It is best to adjust the water while drilling as conditions can change throughout the bore hole CAUTION Never turn the water pump on with the main discharge valve 2 Ball valve to Drill on the support station closed The water should always have a path out and through the drill string Always use clean water Bentonite should not be used as this will clog up the hammer requiring a complete overhaul to return the hammer to an operable condition A good mixture of polymer and Condet is acceptable if drillin
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