The operating hydraulic circuit for a luffing cylinder for a deck crane is shown in the figure. Explain the purpose and describe the operation of EACH item A, B and C. (10) Fig Q1
With reference to a crane operated by a constant pressure hydraulic system incorporating unidirectional, fixed displacement pumps that run continuously, explain EACH of the following: (a) the purpose of the accumulator;(2) (b) how the hydraulic pressure is regulated;(2) (c) how the speed and direction of the hoist motor is varied;(3) (d) how the torque available from the hoist motor can be varied.(3)
