FarmCraft101 | Excavator Gear Pump Diagnosis And Repair, Yanmar VIO50. @FarmCraft101 | Uploaded May 2023 | Updated October 2024, 6 minutes ago.
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: 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?