Hydraulics

Question 1

Explain the meaning of a hydraulic pump LOW PRESSURE indication

Answer 1

Output pressure of the associated pump is low

VOL 2 / 13.1.1

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

VOL 2 / 13.1.1

Question 3

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

Answer 3

Quantities for the A and B system are displayed on the lower DU by pushing the MFD System (SYS) Switch.

A white refill indication (RF) beside the hydraulic quantity indication indicates low hydraulic quantity.

Low quantity in the Standby Hydraulic reservoir is indicated by the illuminated amber Standby Hydraulic LOW QUANTITY light (always armed) on the Forward Overhead Panel

VOL 2 / 13.1.2 & 13.1.3

Question 4

Explain the function of the ENGINE HYDRAULIC PUMP Switches

Answer 4

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

OFF - energizes blocking valve to block pump outpit

Note: normally should remain ON at shutdown to prolong solenoid life. The engine hydraulic pumps, not eletric

VOL 2 / 13.1.1

Question 5

Recall the independent hydraulic systems and how they are designated

Answer 5

• System A
• System B
• Standby system

VOL 2 / 13.2.1

Question 6

Explain the function of the ELECTRIC HYDRAULIC PUMP Switches

Answer 6

ON - provides power to associated electric motor-driven pump

OFF - electrical power removed from pump

VOL 2 / 13.1.1