It's located on top of the engine in front. The nose section. In front of engine compartment there's a flap that opens perpendicular to engine door.
The book says the intire hydraulic system holds 36 gallons and the tank holds 28 gallons. This is from the manual of a 1998 555E I purchased.
The brake reservoir on a Ford 555E backhoe is typically located on or near the hydraulic control panel, often mounted on the left side of the machine. It is usually a small, translucent tank that allows you to check the brake fluid level. Make sure to refer to the operator's manual for specific details and maintenance instructions.
where is oil cap