Hydraulics Flashcards
Explain the meaning of a hydraulic OVERHEAT indication.
Hydraulic fluid used to cool and lubricate the corresponding electric motor driven pump has overheated or the pump itself has overheated.
Identify where the hydraulic fluid quantity is displayed and the associated indicator of low quantity.
A & B
Standby
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 for the Standby system is indicated by an illuminated amber Standby Hydraulic LOW QUANTITY light (always armed) on the Forward Overhead panel.
Explain the function of the ENGINE HYDRAULIC PUMP Switches.
ON
OFF
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.
Recall the independent hydraulic systems and how they are designated.
(3)
Three independent systems designated:
- System A
- System B
- Standby system
Explain the function of the ELECTRIC HYDRAULIC PUMP Switches.
ON
OFF
ON – provides power to associated electric motor–driven pump.
OFF – electrical power removed from pump.
Explain the meaning of a hydraulic pump LOW PRESSURE indication.
Output pressure of the associated pump is low.
