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Read articles →This is a real-time diagnostic teardown, not a review: a mobile tech traces a whining/screeching hydraulic noise on a low-hour 4052R to a selective control valve, explaining how the solenoids and spool valve work, bench-testing solenoids, pulling the spool valve, and finding it physically stuck on a metal speck jammed in the valve body. He also names the part (LVA17509) and its rough price range. Useful for owners troubleshooting similar hydraulic noise or dead-heading symptoms.
Posted by Kitsap Mobile Tractor Repair, a hands-on repair channel documenting an actual customer job rather than a sales or review video.
A selective control valve spool can get physically stuck, in this case jammed by a metal speck lodged in the valve body, causing pressure to dead-head and create a screeching noise.
Trace hydraulic lines, bench-test the solenoids for power and magnetizing, then check if the spool valve itself moves freely; if it will not move even under force, the spool is stuck.
The part is LVA17509, which the technician says runs roughly a thousand to 1400 dollars depending on where you buy it.
A stuck spool valve in the selective control valve can block pressure to certain output lines while others, like the top two outputs under the floorboard, continue working normally.
