Lifting Equipment Harkness Career Center. Lift Types –Frame-contact lift –Wheel-contact...
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Transcript of Lifting Equipment Harkness Career Center. Lift Types –Frame-contact lift –Wheel-contact...
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
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• All four wheels
supported
• Also has mechanical locks
• Works well for hard to lift vehicles
• Are located in the middle of the drive on lift
• Are used to raise vehicles off there wheels
• Have mechanicalsafety locks
• Operate on air and/or Hydraulic pressure
Wheel-Free Jacks
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 drive-
on 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