Hawk, While you ponder which manuals to get to help you with working on your truck, take a look through the publications throughout this Keith Hardy's OLD ONLINE CHEVY MANUALS. It is an extremely handy source page. You will find shop, parts and owners manuals available to peruse as well as other technical source documents that will be of great help to you. Unfortunately nothing about the dump hydraulics specifically.

For questions on those though, you could probably post some questions about them and other "Big" truck related specifics in our Big Bolts forum. We have many Bolters with hydraulic dump systems which may be able to help you with questions or repair needs.

~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)