Excavator Gear Pump Diagnosis And Repair, Yanmar VIO50.

While using my excavator taking down some trees, it started acting up. The blade down function and the swing function both suddenly got very weak. Here I go through the troubleshooting process and repair to get it back in action.

@PracticalEngineeringChannel Grady's take on pumps pretty much matches mine: https://www.youtube.com/watch?v=m3i_5xP9PYU

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00:00 Intro
1:15 Check pressure
3:01 Check pressure relief valve
11:05 Awesome trick
12:26 Swap relief valves
16:10 Diagnosis made, start repair.
19:49 Meanwhile
21:03 Pump teardown
28:45 Install new pump
31:50 Check pressures on new pump
33:32 What’s next?