The correct dump truck valve might have the following part numbers. This could also be used to control other hydraulic machinery, such as a dump body or hoist on a flat-bed or cargo truck. To see the specs, just go to Google and search for "Eaton CM11 valve". The first hit should be the PDF spec sheet for these valves from Eaton's website.From the specs and part number. This valve is a type D Spool This spool directs flow to either end of a double acting cylinder. Some other valves might be type B Spool This spool is normally used to direct flow to a reversible rotation, hydraulic motor. Cylinder ports remain partially open in the neutral position to allow oil flow between motor and reservoir. While a type "B" spool is typically used for hydraulic motors, the partially open ports allow the motor free-wheel in neutral.
So, while either will work for a truck winch application, where an internal winch brake is used, I prefer not to have my winch motor being allowed to free-wheel when in the neutral position, just in case the brake cannot hold. You definitely do NOT want a type "B" spool, free-wheeling valve for a dump cylinder application. This is not compatible with the older, mechanically driven front and rear winches on other army trucks (such as M34, M35, M35A1, M35A2, M275, M275A1, M275A2, M109, M109A2, M109A3, M108, M60, M36, M36A1, M36A2, GMC M211 and M135, M812, M813, M814, M816, M815, M817, M820, M820A1, M820A2, M821), but could be used with a hydraulic pump to operate auxiliary equipment, like a snow plow power angle feature or a dump hoist. This would not be ideal for a snow plow lift/lower application.
You would probably want a "B" spool valve for that, since it should allow the plow to "float" in neutral. If you are adding a front winch to your M923, M923A1, M923A2, M927, M927A1, M927A2, M931, M931A1, or M931A1 truck, then this part is what you need to actually operate the winch. Thank you for your understanding. The item "M925 M928 M936 M939 M923 hydraulic winch control valve Eaton CM-11 Vickers M932" is in sale since Friday, February 7, 2020.This item is in the category "eBay Motors\Parts & Accessories\Other Vehicle Parts\Other". The seller is "454nova" and is located in Rosedale, Maryland. This item can be shipped to United States.