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Hyundai HDB10 Manual

Hyundai HDB10 Manual

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CONTENTS
Chapter 2. Specification & Suitable Excavators
Chapter 5. Mounting Bracket Plate Dimension
II

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Summary of Contents for Hyundai HDB10

  • Page 1: Table Of Contents

    CONTENTS Chapter 1. Products & Structure Chapter 2. Specification & Suitable Excavators Chapter 3. Principle of operation Chapter 4. General information Chapter 5. Mounting Bracket Plate Dimension Chapter 6. Torque Chapter 7. Operation Chapter 8. Disassembling & Assembling Chapter 9. Installation Chapter 10.
  • Page 2 Every time you want to replace an y of the spare parts, please make sure you use HYUNDAI genuine parts. We do n ot guarantee any damages, disorders, and injuries caused by your mistake.

  • Page 3: Chapter 1. Products & Structure

    Products & Structure 1.1 HDB Series Breaker 1) Products HDB10, HDB20 : Internal Control Valve Type HDB40, HDB50, HDB70, HDB90, HDB140, HDB180, HDB210 : Non Accumulator type HDB230, HDB250, HDB300, HDB360, HDB450, HDB650, HDB800 : Accumulator type 2) Structure INTERNAL CONTROL VALVE TYPE...
  • Page 4 Products & Structure a) The HDB Series breaker consists of four main sections : cylinder, control val ve, front head and head cap. b) The cylinder contains a moving piston which strikes the chisel. c) Four through bolts are assembled to hold the cylinder and head cap together with front head.
  • Page 5 Specification & Suitable Equipment 2.1 Specification of Breakers Item HDB10 HDB20 HDB40 HDB50 HDB70 HDB90 HDB140 Operating Weight (w/Top Box BKT.) 1354 2048 1110 1239 1408 1603 1805 1981 2225 Overall Length w/STD. MTG. BKT.) Inch 43.7 48.8 55.4 64.1 71.1...
  • Page 6 Specification & Suitable Equipment 2.1 Specification of Breakers HDB180 HDB210 HDB250 HDB300 HDB360 HDB450 HDB650 HDB800 1209 1738 2165 2832 2937 3713 4380 5625 2665 3832 4773 6243 6475 8186 9656 12401 2455 2764 2898 3200 3200 3595 3766 4059 96.7 108.8 114.1...
  • Page 7 Specification & Suitable Equipment 2.2 Suitable Excavators Breaker Model Excavator Model HDB10 0.5~1.5 1.6 ton HDB20 0.8~1.5 1.6 ~ 2.7 ton HDB40 3~4.5 3.5 ton HDB50 5.5 ~ 6.0 ton HDB70 5.5 ~ 6.0 ton HDB90 8.0 ton HDB140 10~15 14 ~ 14.2 ton...
  • Page 8 Specification & Suitable Equipment 2.3 Breaker Impact Energy/Setting Pressure Impact Energy Setting Pressure Model kgf/cm HDB10 HDB20 HDB40 HDB50 HDB70 HDB90 1100 HDB140 2160 HDB180 2350 HDB210 3110 HDB250 5580 HDB300 7150 HDB360 7150 HDB450 9980 HDB650 12265 HDB800 14310...

  • Page 9: Chapter 3. Principle Of Operation

    Principle of operation 3.1 Operation 1) Piston Rises 2) Valve Rises 3) Piston Descends 4) Impact Fig. 3-1 1) Piston rises When the high pressure enters, the chamber is ① faced with the lower side of th e piston ⑧which changes the direction of flow. Then, the chamber work together with the low pressure circuit ②...

  • Page 10: Chapter 4. General Information

    General Information 1) Usage of breaker HDB Series breakers are designed to work in quarries, various construction sites, such as building disassembly, breaking up roads, housing land development, se wage system and so on. The chisel selection is dependent on working material i n accordance with chisel appearance.
  • Page 11 General Information 7) Hydraulic System The impact energy of the breaker is constant and independent of the carrier's hy draulic system. Although you stop the excavator, the rest of the oil pressure is sti ll getting into the breaker and operates the breaker. Hydraulic fluid at system is dangerous.
  • Page 12 Do not try to do repairs or any other maintenance you do not understand. When you need to replace old part for new one, please contact your HYUNDAI Service center for advice. Service and repairs are only to be made by authorized person nel.
  • Page 13 Mounting Bracket Plate Dimension (Unit:mm) T (Before Model Material machined) (machined) HDB10 HDB20 HDB40 SM490A HDB50 HDB70 HDB90...
  • Page 14 Mounting Bracket Plate Dimension (Unit:mm) T (Before Model Material Manchined) (machined) HDB140 455 538 130 135 140 198 SM490A HDB180 540 605 145 180 155 225...
  • Page 15 Mounting Bracket Plate Dimension (Unit:mm) T (Before Model Material machined) (machined) HDB210 570 665 160 180 160 137.5 35 HDB250 635 700 190 186 34.5 175 140 SM490A HDB300 700 760 210 200 185 155 HDB360 HDB450 740 805 220 220 40 192.5 170...
  • Page 16 Mounting Bracket Plate Dimension (Unit:mm) <HDB650> <HDB800>...

  • Page 17: Chapter 6. Torque

    Before starting work, check all the bolts' tightness and also be sure to retighten loose bolts to the specified torque referred in the manual. The procedure of tightening torque of each bolts is as follows. 1) Through Bolt Model HDB10 HDB20 HDB40 HDB50 HDB70...
  • Page 18 Torque 2) Top Mounting Bracket Bolt Model HDB10 HDB20 HDB40 HDB50 HDB70 Spec. M16 x P2.0 x 60 M16 x P2.0 x 60 M20 x P2.5 x 65 M20 x P2.5 x 65 M20 x P2.5 x 65 Part No.
  • Page 19 Torque Acc. Cover Bolt Acc. Body Bolt 3) Accumulator Bolt HDB250 HDB300, HDB360, HDB450 Model Acc. Cover Bolt Acc. Body Bolt Acc. Cover Bolt Acc. Body Bolt Spec. M18 x P1.5 x 50 M24 x P2.0 x 60 M20 x P2.0 x 55 M30 x P2.0 x 70 Part No.
  • Page 20 Torque 4) Valve Cap Bolt Model HDB40 HDB50 HDB90 HDB140 Spec. M12x30 M16xP1.5x40-30S M16xP1.5x45-35S M20xP1.5x45-35S Part No. 013029-120304 013020-160404 013020-160454 013020-200454 Torque (Kg-m) Model HDB180 HDB210 HDB250 HDB300 M20xP1.5x45-35S M24xP2.0x50 M24xP2.0x55 M30xP2.0x65 Spec. 013020-200454 013036-240500 013036-240550 013036-300650 Part No. Torque (Kg-m) HDB360 HDB450...
  • Page 21 Torque 5) Valve Case Bolt Model HDB40 HDB50 HDB70 HDB90 HDB140 M12x40 M16xP1.5x40-30S M16xP1.5x40-30S M20xP1.5x50 M20xP1.5x55-50S Spec. 013029-120404 013020-160404 013020-160404 013020-200504 013020-200554 Part No. Torque (Kg-m) HDB180 HDB210 HDB250 HDB300 Model M20xP1.5x60-55S M24xP2.0x60 M24xP2.0x65 M30xP2.0x80 Spec. Part No. 013020-200604 13036-240600 013036-240650 013036-300800 Torque...

  • Page 22: Chapter 7. Operation

    Operation CAUTION Close the front screen or splinter protection on the driver's cab to prevent possible inj ury from flying rock splinters during operation. During the operation, every person in the surrounding area, including the excavator dri ver, must wear ear protector and breathing protection. The hydraulic breaker should be operated from the driver's seat and should not be put into operation until both the excavator and the breaker are in the correct position.
  • Page 23 Operation HDB Series Breaker Operation Method Fig. 7-1 Fig. 7-1...
  • Page 24 Operation 1) Proper thrust To break effectively, a proper thrust force has to be applied to the breaker. If a thrust is insufficient, the hammering energy of the piston will not be sufficient fo r breaking rocks. Then, the hammering force is transferred to the breaker body, arm and boom of the base machine, etc.
  • Page 25 Operation Fig. 7-3 Further, during hammering, always keep in mind of applying a proper thrust to th e breaker. Do not hammer without proper applied thrust. Fig. 7-4...
  • Page 26 Operation 2) Direction of thrust Apply a thrust in a straight line with the tool. Place the tool on a rock wi th the hammering side as vertically as possible. If the hammering side is oblique, the tool may slip during hammering, causing the chisel and piston to break, or seized.
  • Page 27 Operation Fig. 7-6 b) Stopping (Avoid idle hammering to the utmost) As soon as rocks are broken, stop hammering. If idle hammering is continued, the accumulator may be damaged, the bolts l oosened or broken and, furthermore, the base machine may also be affected. When a proper thrust is not applied to the breaker or the chisel used as a le ver, the state of idle hammering will be brought.
  • Page 28 Operation Fig. 7-8 d) Do not use the tool as a lever. When a rock is broken by using the tool as a lever as showed, the bolts and chisel may be broken. Fig. 7-9 e) Do not continue to hammer for more than 30 seconds on a same point. When rocks are hard, do not hammer the same place for such a long time t o exceed one minute but change the point to be hammered.
  • Page 29 Operation f) On a hard, large rock, start breaking at the end point. Beginning to hammer at the crack or the end will enable even a big rock to be broken comparatively easily. Fig. 7-10 g) Operate the breaker at a proper engine speed. Break rocks at the specified engine speed.
  • Page 30 Operation h) Do not operate the breaker in water and mud. Do not operate the breaker in water and mud. If not, the piston or the similar c omponents may be rusted to result in the permanently damaged breaker. In cas e of operation in or under the water, buy underwater operation kit separately.
  • Page 31 Operation Do not hammer with the cylinders extended to the end of stroke. When a rock is broken with base machine cylinder moved to the end, (the cy linder extended or retracted fully), the cylinder and each part of the base ma chine may be damaged.
  • Page 32 Operation The boom of the excavator or arm can be damaged if not operated correctly. Please be aware of the location of the Breaker’s chisel while operating the breaker. Fig. 7-16 m) Especially, in winter, warm up the base machine engine from five to twenty minutes and then operate the breaker.
  • Page 33 Please note : Breaker can be adapted for underwater use. When needed, please contact HYUN DAI dealers or HYUNDAI service center. 14) Working in high-temperature conditions Check the oil temperature constantly to ensure it does not exceed 80℃.
  • Page 34 Operation Please note : The hydraulic breaker and excavator do not begin to perform at full capacity until an operating temperature has been reached at 60℃. IMPORTANT When working in temperature conditions lower than 20℃ below zero, the hydraulic brea ker should not be put into situation Which the hydraulic Oil is Still cold.
  • Page 35 - Periods of change Hydraulic Oil : every 600 hrs. (*1) Line oil filter : every 100 hrs. (*2) Conventional hydraulic oil Hyundai genuine long life hydraulic oil...
  • Page 36 Operation 17) Type of chisel and major application Type of chisel Shape Applications Multipurpose applications, including breaking of extra hard rock, hard stone, and reinforced Moil point concrete, as well as excavation of bedrock, etc. Concrete breaking, excavation of bed rock, operation on the face of slope, excavation of Wedge point ditches, etc.
  • Page 37 Operation HDB10 HDB20 HDB40 HDB140 HDB210 HDB300 HDB650 Model HDB450 HDB50 HDB180 HDB250 HDB360 HDB800 HDB70 HDB90 Grease gun application (No. of Pumps) Fig. 7-17 Hydraulic oils and grease recommended for hydraulic breaker. Grade Hydraulic oil Grease In hot weather In cold weather NLGI No.2...
  • Page 38 Operation IMPORTANT For preference, HYUNDAI chisel paste should used for lubrication, but the minimum req uirement is a high-performance friction bearing grease with molybdenum sulphide. CAUTION Chisel should only be fitted in the way described here. Never use your fingers to check the alignment of the recesses in chisel to the oblong holes for the locking bars.
  • Page 39 Operation 19) 2 Stroke selector system (TPC) HDB series provides the 2 STAGE STROKE selector as standard for HDB50 to H DB450 and the stroke can be chosen as the manual via selector. The standard stroke and short stroke can be chosen according to job site. 2 stroke selector (HDB50 ~ HDB180) 2 stroke selector...
  • Page 40 To operate anti blank firing, lock nut of valve is turned counter clockwise, 3 tim es around (HDB360, HDB450 : 5 times) from the closed position. And then tighten the lock nut. Anti blank firing is set up to operate at the time of delivery from HYUNDAI. Auto control valve WARNING Do not attempt to assemble or disassemble the main body before reading through this chapter of the manual.

  • Page 41: Disassembling And Assembling

    Disassembling & Assembling 8.1 Disassembling 1) Put the body on wooden supports of the equivalent size. => Fig. 8-1. 2) Release N gas from the head cap. If not released, it would be very dangerous. => Fig. 8-2. Fig. 8-1 Fig.
  • Page 42 Disassembling & Assembling 5) Disassemble cylinder with eye bolt using chain block or hoist to the arrowed/poin ted direction. => Fig. 8-5. Fig. 8-5 6) Disassemble piston with eye bolt toward upper vertically, using chain block or hoi st to the arrowed/pointed direction. => Fig. 8-6. 7) Loose and disassemble the through bolt from front head in screwing out the qua drangle part with bottom nut by using HDB standard spanner.
  • Page 43 Please note that once seals and rings are removed, they should not be used ag ain. Model Cylinder Cylinder Bush Part Name HDB10 HDB20 HDB40 HDB50 ① Dust Seal HDB70 ② U-Packing HDB90 ③...
  • Page 44 Disassembling & Assembling 9) Disassembly of control valve Clamp control valve case in a vice and loosen hex-head bolts of valve cap. Then, remove valve cap by using the tap for disassembly. Fig. 8-8 Valve can be seen after the removal of valve cap. In the absence of seizure, valve can be withdrawn with ease.
  • Page 45 Disassembling & Assembling 10) Inspection Seals While seals are still in their original position, check for scratches and deform ation. Do not remove to check. Even a small scratch will lead to oil leakage. Fig. 8-10 Note : Change all seals every 800 working hours. Control valve Inspect valve for signs of seizure or scuffing.
  • Page 46 Disassembling & Assembling Piston Periodically the lower end of piston deformation must be checked. Fig. 8-12 Check piston for seizure marks and scuffing. If such marks are small and on the section with the largest diameter, remove by polishing with an oil stone. Corresponding marks on the mating part should also be treated in the same manner.
  • Page 47 Disassembling & Assembling 8.2 Assembling 1) Seal assembly Using a brash, lubricating oil should be applied to seal grooves when assembling seals. CAUTION Much care should be taken when assembling seals. 2) Assembly of chisel bush and chisel holder bush. a) Disassemble stop pin.
  • Page 48 Disassembling & Assembling c) Set chisel holder in front cover. d) Assemble stop pin Fig. 8-14 3) Assembly of control valve Wash parts including seals thoroughly with new cleansing oil. After washing, flush off the cleansing oil with clean compressed air to dry it. Dust and other foreign matter will originate seizure and scratches to give seri ous damage to the breaker.
  • Page 49 Disassembling & Assembling d) Clamp valve box in a vice and tighten bolts according to their specified torqu e referring to chapter 6. Fig. 8-15 4) General assembly. Fig. 8-16...
  • Page 50 Disassembling & Assembling a) Assemble through bolts to front head with bott om nut. b) Assemble cylinder. c) Lubricate piston thoroughly and slowly assemb le piston and packing bush. Confirm the direc tion of seals of cylinder and cylinder bush. d) Using a rubber hammer, assemble the cylinder bush into the cylinder.

  • Page 51: Chapter 9. Installation

    Installation 9.1 Breaker Lifting Point Fig. 9-1 1) Breaker Lifting Point Model Weight(Kg) Allowed load of Lifting Part(Kg) HDB10 HDB20 HDB40 1550 HDB50 2640 HDB70 3200 HDB90 5820 HDB140 7680 HDB180 1300 12800 HDB210 1800 12800 HDB250 2200 12800 HDB300...
  • Page 52 Installation Fig. 9-2 2) Suitable Eye Bolt for Breaker main Body Model Weight(Kg) Specification Allowed load (Kg) HDB10 HDB20 HDB40 HDB50 HDB70 HDB90 HDB140 HDB180 HDB210 1010 1500 HDB250 1150 1500 HDB300 1400 1500 HDB360 1400 1500 HDB450 1630 2300...
  • Page 53 Installation 9.2 Installation into excavator Fig. 9-3 - Put the breaker on wooden square bars laid on the flatted ground. - Set the nitrogen gas pressure in head cap of breaker in accordance with the specific value of the breaker. - Please refer to chapter 10 for the specific values.
  • Page 54 Installation - Adjust relief valve in order to control the setting pressure for breaker after clo sing stop valve of excavator. Please refer to chapter 2 to set pressure values. - If excavator does not have a relief valve for breaker, please attach it to equi pment and control the setting pressure.
  • Page 55 Installation 9.3 HYUNDAI Excavator Breaker Mode & User Mode Setting HYUNDAI Excavator HYUNDAI Breaker ATTACH TOOL Model Remarks Model Max Flow(lpm) HDB140 R140LC-9 HDB140 R140W-9 HDB140 R145CR-9 HDB180 R160LC-9 HDB180 R170W-9 HDB180 R180LC-9 HDB210 R210W-9 HDB210 R220LC-9S HDB210 R210LC-9 HDB250...

  • Page 56: Installation Precaution

    Installation 9.4 Installation precaution When the bucket and breaker operation are performed alternately, the hydraulic break er is connected to the base machine with the two hydraulic hoses and two pins, the refore the bucket and breaker can easily be replaced by each other. However as the hydraulic circuit is easily apt to be damaged by contamination, remo ve and install to the following procedures with care.
  • Page 57 Installation 3) Loosen the hydraulic hose fittings on the arm side. At this time, as a small amount of oil flows out, collect it in an empty container. 4) To prevent mud, dust and dirt from entering the oil hoses and fittings, install an d tighten union cap and 60°elbow adapter provided for this purpose.
  • Page 58 Installation 5) Pull out the pins on the bucket link and arm side and then the breaker can be r emoved. Replace with a bucket and continue operation. When placing the hydraulic breaker outdoor, put wood blocks under the breaker a nd then cover with waterproof canvas or something similar.

  • Page 59: Hydraulic System

    Installation 9.5 Hydraulic system Fig. 9-9 1) Proper input oil flow You have to attach a package valve for breaker or equivalent valve to control out put flow from pump so as to acquire appropriate number of blows and reduce p eak pressure to control output flow.
  • Page 60 Installation 2) Pressure pulse a) Pump to Breaker input line ■ Average operating pressure of pump Indispensable condition The average value of operating pump pressure is much less than that of com pensating pressure. Purpose : Prevent an abrasion of regulator and swash plate supporter of pump ■...
  • Page 61 Installation ■ Inlet pressure pulse of breaker (Pmin, Breaker) Indispensable condition On operating breaker, minimum value of peak pressure of breaker inlet keep on higher than diaphragm precharge pressure (60bar) or so. (Pmin, Breaker ≥ 60bar) Purpose : Protecting hydraulic components as to achieve efficiency of diaphr agm.

  • Page 62: Piping System

    (When equipping special hydraulic filter for breaker, filter element is below 10㎛) b) Return oil must go through oil cooler. Purpose : Protect overheat of oil and trouble of hydraulic components cause d by contamination of hydraulic system. 9.7 Hose & Tube pipe size Model HDB10 HDB20 HDB40 HDB50 HDB70 HDB90...
  • Page 63 Installation 9.8 Hose & Tube fitting torque Nominal Size(mm) 12.7 19.1 25.4 31.8 31.8 50.8 TORQUE(Kg-m) 9.9 Method of adjusting impact blows The blows of Breaker is adjusted by oil flow of excavator, and oil flow of excavator i s controlled by reducing pressure valve in control valve at breaker line. If you want more blows, you can set reducing pressure much less, otherwise, much more.

  • Page 64: Chapter 10. Maintenance

    Maintenance 10.1 Cylinder group As the cylinder group is extremely important part, rough handling will cause malfuncti on of the breaker. When performing maintenance service the high attention should be paid. Fig. 10-1 a. Cylinder & Valve case Check the slide parts A, B and C for flaws. If there are scuffing flaws, finish the surface to be smooth with a buffing grinder, If there are flaws in the part D, fini sh the surface with sandpaper, #800-#1200.
  • Page 65 Maintenance 10.2 Caution on using the buffing grinder a. Cylinder Fig. 10-2 b. Piston Fig. 10-3 c. Cylinder bush When using the buffing grindstone, apply the grinder correctly to the circumference. If the grinder is led straight ahead, circularity will be spoiled. Wash t he parts after finishing them.
  • Page 66 Maintenance 10.3 Accumulator CAUTION ONLY FILL WITH N GAS! GAS CHARGE PRESSURE : 52 Kgf/cm at 20℃ THIS VESSEL CONTAINS HlGH PRESSUR GAS. REMOVE REMAINING GAS COMPLETELY BEFORE DISASSEMBLY.
  • Page 67 Maintenance 10.4 Charging nitrogen gas into gas chamber The pressure in gas chamber may defer in accordance with the model of excavator used. In case the gas pressure is too high, the oil pressure will rise which may result in ov erheating of the hydraulic oil and irregular blow.
  • Page 68 8. High presurue occurs in operation of charger and relief valve functions alo ng with noise but it is normal operation. If you find any abnormal status like gas leakage after checking the above poin ts, visit HYUNDAI service center to repair the damaged or replace it with new genuine parts.
  • Page 69 Maintenance Release valve Connector 1 Hose connector (for H/cap & Acc) Relief valve (R1) Adaptor nut Connector 2 Bombe connector Gas tank) Pressure regulating valve Adaptor...
  • Page 70 Maintenance CHARGING NITROGEN GAS INSTRUCTION ■ Use Model : HDB10, HDB20 When the breaker is delivered, charge the Head Cap with N gas as following proced ure and operate the Breaker. Inspection of nitrogen(N ) gas into Head Cap. Warning Be sure to check the surroundings of machine for safety before starting maintenance.
  • Page 71 When gas pressure is excessively high, breaker will not operate. Ensure that gas pressure is at specified pressure and O-ring in three-way valve is installed. (Unit:kgf/cm Model HDB10-9 HDB20-9 HDB30-9 Head Cap Gas Pressure 16.5 16.5...
  • Page 72 Maintenance ■ Charging HEAD CAP with N ■ Use Model(Para modelos): HDB10, HDB20, HDB40, HDB50, HDB70, HDB90, HDB140, HDB180, HDB210, HDB250, HDB300, HDB360, HDB450, HDB650, HDB800 You must check nitrogen gas pressure before operation even though the machine 's gas has been set from the factory for the best performance. You need to che ck gas pressure every 2 weeks.
  • Page 73 (If you see soap bubble after applying liquid soap on the gas valve, N gas is le aking) (Unit: kgf/cm Model HDB10 HDB20 HDB40 HDB50 HDB70 HDB90 HDB140 HDB180 Head Cap Gas Pressure (Unit: kgf/cm Model HDB210...
  • Page 74 Maintenance (Unit: kgf/cm Pressure Temperature(℃) 10.8 14.8 10.2 11.2 15.4 10.6 11.6 15.9 11.0 12.0 16.5 11.4 12.4 17.1 11.8 12.8 17.6 12.1 13.2 18.2 10.2 12.5 13.6 18.8 10.5 12.9 14.0 19.3 10.8 13.3 14.5 19.9 Fig. 7...
  • Page 75 Maintenance CHARGING NITROGEN GAS INSTRUCTION ■ Charging Accumulator with N ■ Use Model : HDB250, HDB300, HDB360, HDB450, HDB650, HDB800 You must check nitrogen gas pressure before operation even though the mac hine's gas has been set from the factory for the best performance. You need to check gas pressure every 2 weeks.
  • Page 76 Maintenance 4.1 If you found more N gas according to 'N Gas Pressure Table' you should r elease some gas by following the process below. Release some gas by turning drain valve (D2) counter-clockwise so that Ac cumulator has only recommended gas pressure. (Fig. 4) 4.2 If you found loss N gas according to 'N Gas Pressure Table' you should a...
  • Page 77 Maintenance Pressure(kgf/cm Temperature(℃) 46.7 48.5 50.2 52.0 53.8 55.5 57.3 59.1 60.9 62.6 Ref.) Depends on the temperature of Accumulator surface.
  • Page 78 Maintenance 10.5 Assembly and Disassembly of Top Box Bracket Breaker 1) Insert o-ring No.16 into the groove of plug on the top box bracket No.1. 2) Assemble Damper plate to the bracket. 3) Set bottom damper No.17 at the bottom area of bracket. 4) Assemble main body No.30 into the bracket.
  • Page 79 Maintenance...

  • Page 80: Wearing Parts

    Maintenance 10.6 Wearing parts a. When damaged or worn, your attention is highly required to exchange these item - Chisel - Front cover, must be removed at the service shop - Chisel pins - Stopper pin, chisel pin stopper - Rubber plug, chisel pin stopper plug - Hydraulic seals - Side bolts - Hydraulic hoses...
  • Page 81 Maintenance Fig. 10-8 - When replacing each part, check each part for wear, breakage, scoures, etc., especially, after removing burrs and swelling on chisel pins. - Replace chisel after grinding the worn parts of front head and chisel pin. Insert a new chisel pin after grinding the scuffed parts of front head in use.
  • Page 82 When the clearance between the chisel and front cover becomes large, it is strongly recommended to replace these parts to prevent from wear. Exceeding the following value may damage other component parts, such as the pist on and cylinder. Fig. 10-9 (Unit: mm) Model HDB10 HDB20 HDB40 HDB50 HDB70 HDB90 HDB140...
  • Page 83 Maintenance 10.8 Caution for long term storage ■ Store breaker in dry area with small temperature difference. ■ The tool should be removed and nitrogen gas should be released. ■ The lower end of piston should be greased. Tool and bushing should be coated with anticorrosive. ■...

  • Page 84: Oil And Filter

    Maintenance 10.9 Oil and filter a. Oil - The oil for breaker can be used the same of excavator. - When the breaker operates continuously, the temperature of the oil will rise, please check at the moment the viscosity of oil. - If oil viscosity is too high, they may cause stiff operation, irregular strikes, ca vitation in the pumps and sticky valves.

  • Page 85: Troubleshooting Guide

    Maintenance 10.10 Troubleshooting guide a. Oil leakage Even if oil leaks, there is no need replacing parts at all times. Check the followi ng points listed in the below. The user can check the remedy before calling deal Area of oil leakage Condition Causes &...
  • Page 86 Maintenance Condition Major cause Remedies Relief valve is set too low. Check pressure of relief valve. Apply enough down pressure with arm or boom Not enough down pressure on tool. of base machine. The clearance between the tool and Check the clearance between tool and front front cover are too large.
  • Page 87 Maintenance Item Conditions Cause Countermeasure Insufficient power (P x Q). Insufficient down pressure on Check power. tool. Proper instructions. Clogged piping. Check and repair. Breaker will not work. Seizure of breaker. Repair or replace worn parts. filling-up of hydraulic oil in head Replace seals.
  • Page 88 Maintenance Item Conditions Cause Countermeasure Pressure drop In head cap. Recharge nitrogen gas. Insufficient down pressure on tool Proper instruction. Weak Impact force. Insufficient power (P x Q). Check power. Breakage of tool in front head. Replace tool and check piston. Main body Loose joints &...

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