Published on March 12, 2014
www.offroadjunkie.com Hi Lift Jack Workshop Dr. Tejas Kothari
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? www.offroadjunkie.com
Hi Lift Jack Versatile lever-operated mechanical jack capable of a lift of a metre or more www.offroadjunkie.com
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. www.offroadjunkie.com 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.
Synonyms Farm Jack Implement Jack Railroad Jack Vaporjack Unijack Jackall Handyman Jack Sheepherder's Jack Long-beam ratchet jacks The Widow Maker www.offroadjunkie.com
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 www.offroadjunkie.com
Cast / Steel www.offroadjunkie.com Occasional offroad use Black powder ﬁnish 3’, 3.5’, 4’ & 5’
All Cast www.offroadjunkie.com Regular offroad use Red powder ﬁnish 3.5’, 4’ & 5’
X-treme www.offroadjunkie.com Extreme offroad use Charcoal Metallic powder ﬁnish 4’ & 5’ Clamping & Winching attachment
First Responder Jack www.offroadjunkie.com Similar to x-treme Bright colour Fluorescent coating Swivel base
Speciﬁcations Weight Rating www.offroadjunkie.com
Weight 11.3 to 14.2 Kgs Why is it important to know the weight? www.offroadjunkie.com
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 www.offroadjunkie.com
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 www.offroadjunkie.com
Winching: 5000 pounds www.offroadjunkie.com
Clamping: 340 kgs www.offroadjunkie.com
Basic Safety Read the manual Keep bystanders away Inspect the jack Gloves www.offroadjunkie.com
Handling the jack Weight Position of reversing pin Laying the jack down www.offroadjunkie.com
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 www.offroadjunkie.com
How does it work? www.offroadjunkie.com
The lifting ratio is almost 30:1 www.offroadjunkie.com
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 www.offroadjunkie.com
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 www.offroadjunkie.com
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 www.offroadjunkie.com
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. www.offroadjunkie.com
Lifting Points Bumpers Rock sliders What not to use: Tubular bumpers Door Sills Unrated Bumpers www.offroadjunkie.com
Lifting procedure Positioning the jack Holding the jack Lifting procedure www.offroadjunkie.com
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 www.offroadjunkie.com
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. www.offroadjunkie.com
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. www.offroadjunkie.com
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 www.offroadjunkie.com
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 www.offroadjunkie.com
Breaking the tyre bead www.offroadjunkie.com
Jack and Push www.offroadjunkie.com Reference: Ken Sibly The New Zealand 4 Wheel Drive Handbook. Shoal Bay, 2004, page 183 Personal copy.
Accessories www.hi-lift.com DIYs / alternatives www.offroadjunkie.com
Neoprene Jack Cover www.offroadjunkie.com
Jack Protector www.offroadjunkie.com
Handle Keeper www.offroadjunkie.com
Off-Road Base www.offroadjunkie.com
Off-Road Kit www.offroadjunkie.com
Bumper Lift www.offroadjunkie.com
Jack Mate www.offroadjunkie.com
Mount Adapter www.offroadjunkie.com
Mount Adapter www.offroadjunkie.com
Self Recovery www.offroadjunkie.com
Tip # 1 You can use the hi lift handle to straighten out a bent steering rod. www.offroadjunkie.com
Tip # 2 Use a shovel to reposition your tyre. www.offroadjunkie.com !
Tip # 3 Which Gloves? Why? www.offroadjunkie.com
Ideal Glove www.offroadjunkie.com
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 www.offroadjunkie.com
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. www.offroadjunkie.com
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. www.offroadjunkie.com
Why not to use grease? www.offroadjunkie.com
Mounting on your vehicle www.offroadjunkie.com Bumper - vertical or horizontal Roof Rack Roll bar Hood Inside Tyre Mount
Roof Rack www.offroadjunkie.com
Roll bar www.offroadjunkie.com
Tyre Mount www.offroadjunkie.com
Alternative - Air Jack www.offroadjunkie.com
www.offroadjunkie.com 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
Other Manufacturers Reese Larin Jackall www.offroadjunkie.com
What’s wrong in this picture? www.offroadjunkie.com
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