Lifting And Using Attachements Flashcards
What must happen before a load is lifted
Lifting operation needs to be properly planned and the operator or other relevant persons needs to ensure that the machine is approved to lift a suspended load.
What needs to be consulted regarding assessing the load to be lifted
The manufacturers lifting capacities chart or data must be read to determine the max load that can be lifted at a particular height and reach
How is the reach determined on the excavator
The horizontal distance from the center of the slew ring to the vertical Centre line of the lifting hook
What restricts weight being lifted over both the front and rear of the machine and over the sides
Due to the narrow chassis tracked or wheeled the lifting capacity is in most situations reduced
If manufacturers data is not known guidelines state what
The excavator should not be used for lifting duties
On wheeled machines the lifting chart indicates what
The lifting capacity in variety of situations when stabilisers are fitted
What are check valves
Boom lowering control devices
What do check valves do
Prevent the boom from lowering in case of hydraulic failure
When do check valves need to be fitted
When the maximum capacity exceeds 1 tonne and fitted with an overload warming device
According to legislation all lifts should be
Properly planned by a trained and experienced person and should take into account all factors in order to minimise a risk of venture or failure
What needs to be considered when planning the lift regarding weight
The weight of the lifting gear such as the as the lifting chains, needs to be added to the weight of the load including any packaging
What does the operator need to do when using a two legged chain attached to the hook mounted on a quick hitch coupler
Operator needs to tilt the coupler by extending the bucket ram sufficiently to ensure that the chains hangs freely and does not fouls any part of the coupler
Before any attachments are fitted or used what must be known
The intended use their weight and the required working radius needs to be known
