Lifting Equipment Harkness Career Center Lift Types Framecontact

Lifting Equipment Harkness Career Center

Lift Types – Frame-contact lift –Wheel-contact (drive-on) lift

Frame-Contact Lifts “Two post lift” • Uses air or hydraulic pressure to raise vehicle • Mechanical locks protect against hydraulic failure • Adapters at the end of adjustable lift arms

• Lift adapters contact vehicle frame at specified lift points • Unitized body -pads contact the pinch welds and the torque boxes • Straight frame -Pads contact the frame directly

• Some adapters adjust to several positions • Lift Pads should Be apposing each other

Frame-Contact Lifts • Symmetrical Lift – the arms on the lift are the same length. • Asymmetrical Lift the arms on the lift are two different lengths.

Wheel-contact Lifts scissor types Types four post

Wheel-contact Lifts • All four wheels supported • Also has mechanical locks • Works well for hard to lift vehicles

Wheel-Free Jacks • Are located in the middle of the drive on lift • Are used to raise vehicles off there wheels • Have mechanical safety locks • Operate on air and/or Hydraulic pressure

Wheel-Free Jacks • Picks up one end or both ends of the vehicle • Advantages of wheel contact lifts – Picks up off balanced vehicles safely – Center of underside is accessible – Adjusts to pick up different undercarriage designs – Can be rolled along driveon ramps

In-Ground Lifts • In-ground, frame-contact lifts are either single post or two post – Two-posts provide better vehicle access • Has safety locks • Are getting more popular – Do not pollute like they used to (hydraulic fluid leakage) • No posts in the way – Easier to get in and out of the car

Lift Safety • When a vehicle falls off a lift, usually due to carelessness, misuse, neglected maintenance

Lift Safety cont. • Pinch Points – Between the lift and the vehicle – Inside the lift posts – Hands must be on the operating handles when operating – NO ONE should be touching the lift when in use

Lift safety cont. • Rear-wheel-drive cars center of gravity is below the drivers seat • Front-wheel-drive cars center of gravity beneath the steering wheel • One- or two-post lifts, position vehicle’s center of gravity over the posts • Four-post models, position car between front and rear

Lift safety cont. • Rear-wheel-drive cars center of gravity is below the drivers seat • Front-wheel-drive cars center of gravity beneath the steering wheel • One- or two-post lifts, position vehicle’s center of gravity over the posts • Four-post models, position car between front and rear

Lift safety cont. Never exceed the manufacturers “Maximum Capacity” posted on the lift.