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The team at Kingy’s diesel industries had the tricky job of diagnosing a slew fault in an Old Grove RT422 Crane.

The client had issues with skewing the machine, after numerous diagnoses checks. We found our way to the control valve bank.


Our experienced team were able to find a sticky valve spool in the valve assembly. This is caused from contamination in the hydraulic system and often machines that stick around for a long time. 

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