High-Lift Jack
-
Upload
kane-franks -
Category
Documents
-
view
94 -
download
1
description
Transcript of High-Lift Jack
High-Lift Jack
SECTION: Tools and EquipmentISSUED: 02-2011 REVISED: ##-####
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• 48”, N/A
– Clamping - 750 lbs– Winching - 5000 lbs– Material - Cast iron
Hi-Lift Components
• Spine
• Reversing latch
• Climbing pins
• Shear pin
• Base
Jack Mate
• Attachment used for a clamp, base, shackle, chain grab and bite point
Bite Point
Shackle holeChain Grab
Base
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
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
Use
Raising Spreading
UseWinching Clamping
Jack Mate UseShackle Attachment
Chain Grab
Clamp
Jack Mate UseLifting Point Base
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
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