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Hi Lift Jack Workshop for 4x4 Offroad Vehicles

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Hi Lift Jack Workshop for 4x4 Offroad Vehicles

  1. 1. Hi Lift Jack Workshop Dr. Tejas Kothari
  2. 2. Contents What is a Hi Lift Jack Different Types of Hi Lift jacks Parts of a Hi Lift Jack Specifications Safety & Handling Uses & Application Working mechanism Accessories Maintenance Mounting on your vehicle Other Manufacturers Air Jack What’s wrong in this pic?
  3. 3. Hi Lift Jack Versatile lever-operated mechanical jack capable of a lift of a metre or more
  4. 4. Characterized by rugged, simple construction. It comprises a steel beam with a series of equally spaced holes along its length, and a hand operated mechanism which can be moved from one end of the beam to the other through the use of a pair of climbing pins. Typical sizes for the farm jack are 4 feet, 5 feet and 6 feet, the size referring to the length of the beam. The jack's versatility stems from the fact that it can be used for such applications as lifting, winching, clamping, pulling and pushing.
  5. 5. Synonyms Farm Jack Implement Jack Railroad Jack Vaporjack Unijack Jackall Handyman Jack Sheepherder's Jack Long-beam ratchet jacks The Widow Maker
  6. 6. History Founded in 1895 by the late Philip John Harrah First jack made in 1905 One of the oldest family run companies in the state of Indiana, USA
  7. 7. Types
  8. 8. Cast / Steel Occasional offroad use Black powder finish 3’, 3.5’, 4’ & 5’
  9. 9. All Cast Regular offroad use Red powder finish 3.5’, 4’ & 5’
  10. 10. X-treme Extreme offroad use Charcoal Metallic powder finish 4’ & 5’ Clamping & Winching attachment
  11. 11. First Responder Jack Similar to x-treme Bright colour Fluorescent coating Swivel base
  12. 12. Parts
  13. 13.
  14. 14.
  15. 15. Specifications Weight Rating
  16. 16. Weight 11.3 to 14.2 Kgs Why is it important to know the weight?
  17. 17. Rated Load The rated load is the heaviest load which a piece of equipment has been designed to deal with. Manufacturers determine the rated load. This is done in part with the use of standardized equipment which has known tolerances, and in part by testing the equipment to see how much of a load it can bear or produce. 4660 pounds / 2113.74 kgs
  18. 18. Tested Load Test loads is usually a percent of the rated load applied to any equipment The purpose of a mechanical load test is to verify that all the component parts are fit for task and loading it is designed for. 7000 pounds / 3175.14 kgs
  19. 19. Winching: 5000 pounds
  20. 20. Clamping: 340 kgs
  21. 21. Basic Safety Read the manual Keep bystanders away Inspect the jack Gloves
  22. 22. Handling the jack Weight Position of reversing pin Laying the jack down
  23. 23. Uses lifting winching clamping pulling pushing spreading to change a tyre to clear an obstacle remove a object stuck in the ground to break and seat a tyre bead extricate during accidents
  24. 24. How does it work?
  25. 25. The lifting ratio is almost 30:1
  26. 26. Lifting To change a tyre To clear the diff / part resting on a rock To lift a tyre to insert a traction aid To escape a rut
  27. 27. Pre-Lift Procedure Switch off the vehicle - engage parking brake Check the jack Safety protocols Inspect the surroundings and do a stuck assessment Chock the wheels Identify lifting points
  28. 28. Inspect Surroundings Will the vehicle become unstable Will the vehicle roll off Do i have an exit strategy - vehicle and yourself Traction aids are ready Do i have a firm base for the jack - slipping / sinking
  29. 29. Chock and Block A chock is a wedge for steadying an object and holding it motionless, or for preventing the movement of a wheel. Which wheel to chock? Chock the wheel opposite the end being lifted.
  30. 30. Lifting Points Bumpers Rock sliders What not to use: Tubular bumpers Door Sills Unrated Bumpers
  31. 31. Lifting procedure Positioning the jack Holding the jack Lifting procedure
  32. 32.
  33. 33. Grasp the handle firmly with both hands. Carefully pump the handle up and down to raise the load. Do not use an extension on the handle. Why? The load will be raised on each down stroke of the handle. Watch the load and the jack carefully. Stop lifting if either one starts to move. Do not continue until it is safe to do so. When the load is raised to the desired height, place the handle in the upright position clipped to the steel standard bar. Stabilize the load
  34. 34. Lowering the load Most dangerous part Important! During lifting and lowering, the weight of the load pushes up against the jack’s handle. If your hands slip off the handle, or if the handle is horizontal when you move the reversing latch, it may move up very quickly. The jack must have a load of 150 lbs. or more to lower step-by-step. Otherwise, the lifting mechanism will slide down to the base plate, dropping your load. Ensure all bystanders are clear of the load being lowered.
  35. 35. Be sure the handle is in the upright position clipped to the steel standard bar before lowering the load. Move the reversing latch to the down position. Grasp the handle firmly with both hands. Carefully pump the handle up and down to lower the load. The load will be lowered on each up stroke of the handle.
  36. 36.
  37. 37. Clamping Loosen the standard top clamp-clevis bolt. Turn the top clamp-clevis 90° to the steel standard bar, and re-tighten the bolt. Note: You can connect the top clamp-clevis anywhere along the steel standard bar to use the jack as a clamp. Operate the jack as you would for raising a load
  38. 38.
  39. 39. Winching Make sure the top clamp-clevis is in line with the steel standard bar. Install one end of a chain or tow strap securely to the object to be winched. Securely attach the other end of the chain or tow strap to the top clamp-clevis of the jack. Take another chain or tow strap and secure one end to a fixed, stable object. Attach the other end of the chain or tow strap to the large runner on the jack (do not attach chain or shackle to bottom hole of the large runner on the jack). If the fixed object is a tree, follow “Tread Lightly” principles and use a tree strap. Operate the jack as you would for raising a load
  40. 40.
  41. 41. Spreading
  42. 42. Breaking the tyre bead
  43. 43. Jack and Push Reference: Ken Sibly The New Zealand 4 Wheel Drive Handbook. Shoal Bay, 2004, page 183 Personal copy.
  44. 44. Accessories DIYs / alternatives
  45. 45. Neoprene Jack Cover
  46. 46. Jack Protector
  47. 47. Mounts
  48. 48. Handle Keeper
  49. 49. Lift-Mate
  50. 50. Off-Road Base
  51. 51. Off-Road Kit
  52. 52. Bumper Lift
  53. 53. Fix-It-Kit
  54. 54. Handle-All
  55. 55. Jack Mate
  56. 56. Mount Adapter
  57. 57. Mount Adapter
  58. 58. Self Recovery
  59. 59. Tip # 1 You can use the hi lift handle to straighten out a bent steering rod.
  60. 60. Tip # 2 Use a shovel to reposition your tyre. !
  61. 61. Tip # 3 Which Gloves? Why?
  62. 62. Ideal Glove
  63. 63. Maintenance NEVER PERFORM MAINTENANCE ON THE JACK WHILE IT IS UNDER LOAD. Cleaning Air pressure, water pressure, or a stiff brush to clean. Use a non-flammable cleaning solvent or another good de-greaser to clean the jack. Remove any existing rust, preferably with a penetrating lubricant
  64. 64. Binding If the climbing pins start to bind in the holes of the standard bar the jack will not operate properly and safely. Rusty climbing pins, dirt, or worn bar can be causes of binding. Clean and lubricate the lifting mechanism. Test the jack by lifting it up without a load. If the binding continues, send it for repair. If the jack binds while under a load, use a jack with equal or larger load capacity to lower the load safely to the ground. After unbinding the jack clean, lubricate and test.
  65. 65. Storing the Jack Place the handle in the upright clipped position against the steel standard bar. Raise the reversing latch until it locks in the up position. Store in the upright clipped position in a dry location, preferably indoors.
  66. 66. Why not to use grease?
  67. 67. Mounting on your vehicle Bumper - vertical or horizontal Roof Rack Roll bar Hood Inside Tyre Mount
  68. 68. Bumper
  69. 69. Bumper
  70. 70. Bumper
  71. 71. Bumper
  72. 72. Bumper
  73. 73. Roof Rack
  74. 74. Roll bar
  75. 75. Hood
  76. 76. Inside
  77. 77. Inside
  78. 78. Tyre Mount
  79. 79. Alternative - Air Jack
  80. 80. Air  Jack High-­‐li. Used  when  engine  is  running Used  without  engine  running Used  on  almost  any  vehicle Needs  accessories  or  jacking  points Wont  sink  in  so.  ground Needs  base  to  prevent  sinking More  stable  less  versaAle Less  stable  very  versaAle Cannot  be  used  as  a  winch Can  be  used  as  a  winch Cannot  be  used  as  to  jack  and  push Can  be  used  to  jack  and  push Dust  and  sand  does  not  affect  operaAon Dust  and  sand  can  jam  mechanism Useless  if  punctured Reliable  if  properly  maintained Small  punctures  may  be  patched Spares  available
  81. 81. Other Manufacturers Reese Larin Jackall
  82. 82. What’s wrong in this picture?
  83. 83.
  84. 84.
  85. 85.
  86. 86.
  87. 87.
  88. 88.
  89. 89. Thank You