Power Transfer Unit or barking dog, what is it and how it works
We will taker look on A320 hydraulic power transfer unit how it works and also we will take look how to replace it. The aircraft has a power transfer system to transfer hydraulic power between the Green and Yellow systems. This is necessary if one of the engine pumps fails. It also makes it possible to pressurize the Green system from the Yellow system for maintenance (with the Yellow system electric pump).
The Power Transfer Unit (PTU) inhibition logic is fully automatic. Manual control or the crew intervention is not necessary.
The connection between the two systems is mechanical. It is impossible for fluid to get from one system to the other.
When the isolation coupling is disconnected (during ground maintenance operations only), there is no transfer of power.
Reason for replacement: leak
video of the Libherr pump which I used:
• DPVG axial piston pump, technical features...
My Flashlights Fenix LD45R:
https://www.fenixlighting.com/product...
My Headlight Fenix HL45R:
https://www.fenixlighting.com/product...
********video is just for information purposes always stick to the latest maintenance manual.********
How to open and close engine
• How to open jet engine on airbus A320
How to replace fuel pump on the A320 NEO
• A320 NEO Engine fuel pump where is it and ...
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———-Video content———————
00:00 - intro
00:33 - How it works
05:06 - removal of the PTU
07:53 - construction and comparison
08:51 - Installation of PTU
12:30 - Bleeding of the systems
14:38 - Test of the PTU
19:40 - Removal of the HGPU and close up
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