high-lift jack
DESCRIPTION
High-Lift Jack. SECTION: Tools and Equipment ISSUED: 02-2011REVISED: ##-####. Objectives. To provide an understanding of the following Specifications Use Maintenance Safety. Specifications. 48” and 60” Hi-lift jacks Rated load-4660 lbs Tested-7000 lbs Upper 12” 60”, 2660 lbs - PowerPoint PPT PresentationTRANSCRIPT
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High-Lift Jack
SECTION: Tools and EquipmentISSUED: 02-2011 REVISED: ##-####
![Page 2: High-Lift Jack](https://reader036.vdocuments.net/reader036/viewer/2022081503/56813129550346895d979df3/html5/thumbnails/2.jpg)
Objectives
• To provide an understanding of the following– Specifications– Use– Maintenance– Safety
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Specifications
• 48” and 60” Hi-lift jacks– Rated load-4660 lbs– Tested-7000 lbs– Upper 12”
• 60”, 2660 lbs• 48”, N/A
– Clamping - 750 lbs– Winching - 5000 lbs– Material - Cast iron
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Hi-Lift Components
• Spine
• Reversing latch
• Climbing pins
• Shear pin
• Base
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Jack Mate
• Attachment used for a clamp, base, shackle, chain grab and bite point
Bite Point
Shackle holeChain Grab
Base
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Operating Procedures Raising
• Move reversing latch to top position
• Slide jack up to load• Operate jack handle insuring
full strokes are made allowing climbing pins to fully operate
• It requires 177 lbs. of force on the handle to raise/lower a max load of 4660 lbs
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Operating Procedures Lowering
• Move reversing latch down• Operate handle using full
strokes– Use caution as this is when
handle will snap back with considerable force
• Jack will free fall when the load is approximately 100 lbs or less
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Use
Raising Spreading
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UseWinching Clamping
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Jack Mate UseShackle Attachment
Chain Grab
Clamp
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Jack Mate UseLifting Point Base
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Maintenance
• Keep free of dirt and debris • Clean with degreaser and stiff brush• Remove rust with wire brush or Emery cloth• Remove burrs from spine• Lubricate edges of spine and moving parts with
penetrating oil, silicon or Teflon spray• Do NOT use WD40• Inspect and operate, checking for damage and
bent components
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Safety
• Wear appropriate PPE• Lift an inch crib an inch• Bow in spine: Ensure not to side load jack as it
will bend easily• Watch for base kicking out or jack kicking out
under load• Overloading: shear bolt will break causing jack
handle to drop freely • Handle kick back: when raising or lowering a
load the handle can snap back when climbing pins are not set