Unfortunately, the dump body, PTO or electrical pump, and cylinders aren't OEM equipment - Ford manufactures the cab and chassis, and an aftermarket provider installs the dump body, PTO, and hydraulic components. Thus, there isn't a standardized dump setup for these vehicles - we'd need to know who the manufacturer of the hydraulic components is.
There'll be a hydraulic tank... where it is can be variable... some suppliers will split a fuel tank and pipe that as a hydraulic tank, some will install a hydraulic tank on the frame on one side of the vehicle, some put it between the frame rails (IMO, the latter option is stupid, as it typically requires you to raise the dump body in order to access the hydraulic oil fill.... kinda difficult to do if you've just repaired a major leak which dumped a bunch of your hydraulic oil out).
That tank might have the capacity listed on it. Other than that, there isn't any way to give you a definite answer without knowing the aftermarket supplier.
What is the hydraulic oil capacity of the 97' Ford F 800 dump truck with a Heil dump body.
The cylinder which raises the dump body.
Probably a bad hydraulic release valve. Lowering a dump bed simply requires hydraulic pressure to be bled off.
That depends on the make, model, options, and overall condition.
The cylinder, or ram that tilts the load bed.
PTO is a Power Take Off. It's often used to operate hydraulic systems (e.g., the hydraulic pump on a dump truck).
Dump trucks are handy vehicles that are commonly used to transport things such as rocks and dirt for construction and landscaping. Dump trucks are characterized by an open box bed of the truck with a hydraulic hinge at the back allowing all the “cargo” to be deposited behind the truck. Different Kinds of Dump Trucks You can find many models of dump trucks. The classic one is the basic truck characterized by an open box bed with a hydraulic hinge at the back. There are also articulated dump trucks that have hydraulic rams for steering that allow the vehicle to pivot. Articulated dump trucks are called Yukes. Transfer dump trucks are a standard dump truck that pulls a trailer. The second trailer can also be filled with sand, gravel or snow. There is also a triple transfer train that can be found in this family of dump truck. Transfer trucks are often seen in the western part of the U.S., but the triple model is usually not seen outside of Nevada or Utah. The truck and pup is another kind of dump truck. This truck is a bit like the transfer dump truck, but unlike the transfer dump truck, the pup trailer has its own hydraulic lift. A super dump trick is a normal dump truck that comes with special weight bearing axel. This axel is called a Trailing axle, and the dump truck portion is generally about four meters behind the rear tandem. Semi-Trailer Trucks Other models of dump trucks are the semi-trailer family, which come in different varieties. The semi end dump trailer holds a hydraulic hoist. Its advantage is fast unloading. It is limited because it is unstable when dumping. The Semi-Trailer Bottom Dump Truck has a special gate at the bottom center of the truck for unloading. This type of truck can also come in double or triple versions. You can also buy side dump trucks that load out the side and unlike the above trucks they are not likely to tip over. For heavy construction, there are the off-road dump trucks. These are used for heavy dirt hauling and mining operations. Lots of models of trucks make up the category of dump truck.
The dump body is an aftermarket item, and where the reservoir is can vary. I'd start by looking under the truck, as that tends to be a fairly common place. It may also be possible that the fuel tank was split, and part of it used for hydraulic oil.
Dumps truck bodies aren't raised by some sort of "clip". They're raised by pressurised hydraulic fluid.