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HYCON HRD20 Workshop Manual

Hydraulic rock drill
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Download this manual See also: Operating Manual
Hydraulic Rock Drill
HRD20
HYCON A/S
Juelstrupparken 11
DK-9530 Stoevring
Denmark
Tel: +45 9647 5200
Fax: +45 9647 5201

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Summary of Contents for HYCON HRD20

  • Page 1 Hydraulic Rock Drill HRD20 HYCON A/S Juelstrupparken 11 DK-9530 Stoevring Denmark Tel: +45 9647 5200 Fax: +45 9647 5201...

  • Page 2: Table Of Contents

    CONTENT SPECIFICATIONS 2 . P U R P O S E D E S C R I P T I O N E A C H P A R T OPERATION S A F T E Y P R E C A U T I O N CONSTRUCTION 7.

  • Page 3: Specifications

    1. 1. 1. 1. SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS Specifications 1. Type HRD20 2. Working Pressure 8.8-11.8MPa 3. Max Pressure 150 Bar 4. Mass 20 kg 5. Dimensions 626mm (L) x 412mm (W) 6. Tool Chuck Size 7/8” x 108mm Hex 7.

  • Page 4: Purpose

    2. PURPOSE 2. PURPOSE 2. PURPOSE 2. PURPOSE 1. Connect the drill through a hydraulic hose and coupling to a hydraulic hose conforming to the specifications 2. Mount a tool ( drill rod/bit ) confirming to the chuck size of the drill. 3.
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  • Page 6: Operation

    4. OPERATION 4. OPERATION 4. OPERATION 4. OPERATION 1) Connect extension hoses to the hoses of this drill. 2) Connect another end of the extension hoses to a suitable hydraulic source. Connection should be don securely after stopping the hydraulic source. 3) Open the drill stay and attach a suitable tool ( drill rod ).
  • Page 7 Deteriorated or damaged hose should not be used as it is hazardous. 10) Stop the hydraulic source before connecting or disconnecting the hose. 11) While the drill is being used, temperature of each section rises as temperature rises. Use gloves to avoid unnecessary damage due to the high temperature. 5.
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  • Page 9: Maintenance

    7. MAINTENANCE 7. MAINTENANCE 7. MAINTENANCE 7. MAINTENANCE 1) Check hydraulic oil condition so timely as to keep it always clean. If it sticks or changes the color, replace it. 2) Check oil volume before starting if it is sufficient as it decreases by connecting and disconnecting the hoses.

  • Page 10: Cause Of Trouble And Countermeasure

    8 8 8 8 . CAUSE OF TROUBLE AND COUNTERMEASURE . CAUSE OF TROUBLE AND COUNTERMEASURE . CAUSE OF TROUBLE AND COUNTERMEASURE . CAUSE OF TROUBLE AND COUNTERMEASURE 1. Drill does not start operation even though control lever is grasped. Cause Solution 1.
  • Page 11 3. Drill operates but striking and rotating at low rate Cause Solution 1. Low hydraulic source flow rate 1. Increase flow rate to 25-30L/min by rev-up the engine 2. relief valve setting for hydraulic source 2. Replace is too low 4.
  • Page 12 6. Striking rate is high and percussion is strong Cause Solution 1. Excessive oil flow 1. Decrease flow rate to 25-30l/min by slowing down the engine 7. Oil leaks from control lever Cause Solution 1. Worn or hardened o-ring 1. Replace 8.
  • Page 13 11. Drill rod rotates but does not strike Cause Solution 1. The rotation adjust knob is turned fully 1. Turn clockwise for proper position clockwise 2. Damage of the control valve 2. Replace 3. Damage of the piston 3. Replace the piston and the hammer 12.

  • Page 14: Disassemble

    9. DISASSEMBLE 9. DISASSEMBLE 9. DISASSEMBLE 9. DISASSEMBLE 9-1 Notice before disassembling Carry out disassembling in clean environment. Dust or dirt will impede the proper operation of the drill. 9-2 Disassembling procedure ( See Fig.1 ) (1) Set the drill on a stand. (2) Remove no.85, no.86 hydraulic hoses and their seal washers.
  • Page 15 (4) Insert pulling pin (HRC45 – 50 ) into the center hole of no.5 hammer piston and make it detach from no.2 piston hammering the pin with hammer ( 4 lb). (5) Remove no.52 dust seal. Also, remove no.51 u-cup packing using edge-pointed tool. This u-cup packing cannot be used any more.
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  • Page 17 10. POST DISASSEMBILNG INSPECTION AND REPAIR 10-1 Inspection of Different Types of Seal (1) Replace the o-rings which have alternation in form, abrasion, cracks and hardness. ( no.63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73) (2) Replace u-cup packings which have change in color, wear and hardness(no.51). (3) Replace back up packings which have alternation in form and wear (no.74 ).
  • Page 18 10-5 Internal Shaft no.15 Inside hexagon of bushing shows the indicated limit of wear, replace it. 10-6 Inspection of Rotating Parts (1) Idle gear no.116, drive gear no.17 Replace if there are scratches or wear on the teeth or flat side. (2) Thrust washer no.14 Replace if there are scratches or wear on the edge.
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  • Page 23: Assemble

    11. ASSEMBLING 11. ASSEMBLING 11. ASSEMBLING 11. ASSEMBLING 11-1 Notice Before Assembling (1) Wash throughout and clean all the parts. (2) Assemble in appropriate conditions. Dust will hinder the efficiency of the drill. (3) When assembling the seals ( packings, o-rings ), always apply hydraulic oil to them. (4) Be careful not to damage the moving parts such as piston and cylinder.
  • Page 24 11-2-4 assembling of Valve Body (1) Apply middle strength glue on the thread parts of no.3 stud bols and screw them into no. 37 valve body. Tightening Torque : 10 kg.m (2) Install no.42 control valve into valve body and check if the control valve moves smoothly with your finger.
  • Page 25 11-2-8 Assembling of Adjustment Block of Drill Rotation and Motor Block (1) Insert no.75 pin and no.77 pin into no.10 motor block and wash it. (2) Apply hydraulic oil to no.68 o-ring, no.72 o-ring and no.93 back-up ring and attach them to no.12 valve guide.
  • Page 26 11-2-10 Assembling of Drill Stay (1) Set gear motor assembly on a vise. (2) Install no.19 drill stay to it. (3) Apply grease to the drill stay and check if it moves easily and stops at the locking position. 11-3 General Assembling of Component (1) Put up gear motor ass’y on a stand using hex hole of internal shaft.
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  • Page 33: Accumulator Gas Charging

    11. ACCUMULATOR GAS CHARGING 1. Charging preparation 1 ） R emove the cap nut. 2) Attach the charging valve kit to the screw on the accumulator surface and tighten it using your hand. 3) by means of the charging valve rubber hose connect the nitrogen gas valve and charging valve.
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