Hydraulics

Question 1

Explain the meaning of a hydraulic pump LOW PRESSURE indication

Answer 1

Output pressure of the associated pump is low

Question 2

Explain the meaning of a hydraulic OVERHEAT indication

Answer 2

Hydraulic fluid used to cool and lubricate the corresponding electric motor driven pump has overheated or the pump itself has overheated

Question 3

Identify where hydraulic fluid quantity is displayed and the associated indicator of low quantity

Answer 3

Quantities for the A and B system are displayed on the lower DU bu pushing the MFD SYS switch. A white refill indication (RF) beside the hydraulic quantity indication indicates low hydraulic quantity

Question 4

How is Lowe quantity in the standby hydraulic reservoir indicated

Answer 4

By the illuminated standby hydraulic LOW QUANTITY light on the fwd ovhd panel

Question 5

Explain the function of the ENGINE HYDRAULIC PUMP switches

Answer 5

ON: de-energizes blocking valve in pump to allow pump pressure to enter the system

OFF: energizes blocking valve to block pump output

Note: normally should remain ON at shutdown to prolong solenoid life

Question 6

Recall the independent hydraulic systems and how they are designated

Answer 6

Three independent systems:
- System A
- System B
- Standby system

Question 7

Explain the function of the ELECTRICAL HYDRAULIC PUMP switches

Answer 7

ON: provides power to associated electric motor driven pump

OFF: electrical power removed from pump