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 ...   if you want support me click here:    / @zeto.r   Where you can find me: Instagram:   / zeto.r   tiktok:   / zeto.r   Patreon: https://www.patreon.com/Zetomaintenan... Linkedin   / tom%c3%a1%c5%a1-zeman-1861a094   ———-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 #airbus #airbus320 #a320 #aircraft #aircraftmaintenance #howto #aircrafttechnician #hydraulic #aircraftlovers #airbuslovers #aircraftengineer #hydraulicpressure #hydraulicpumps #aviationgeeks #aviationgeeksociety #aviationphotography #aviationdaily #zeto.r #breakdown #components #aircraft #aircraftmaintenace #wefixyoufly #learningeveryday #creatingjourneystronger #austrianairlines