# The Customer Said: “It Has No Power”. We Stripped All the Hydraulics! | Menzi Muck A91

> Video: A Menzi Muck A91 walking excavator lost power. Removing the tank, pumps and pump drive gearbox, inspecting the A4 and A10 pumps, rebuild, replacing the crankshaft seal behind the flywheel, dyno tests and installation.

[▶ The Customer Said: “It Has No Power”. We Stripped All the Hydraulics! | Menzi Muck A91](https://www.youtube.com/watch?v=iRpdxwhB_Gc)

A Menzi Muck A91 walking excavator lost power. Removing the tank, pumps and pump drive gearbox, inspecting the A4 and A10 pumps, rebuild, replacing the crankshaft seal behind the flywheel, dyno tests and installation.

[**Read the full repair report →**](https://wibako.com/about-us/news/835-the-customer-said-it-has-no-power-we-stripped-the-entire-hydraulics-of-a-menzi-muck-a91-walking-excavator)

Published: 2026-07-10

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Source: https://wibako.com/about-us/video/834-the-customer-said-it-has-no-power-we-stripped-all-the-hydraulics-menzi-muck-a91
Contact: +48338704200, biuro@wibako.pl