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