Relative position locations (front, rear, left, and right) are as viewed
standing and facing the manifold assembly.
1-8. Capabilities and Features. The cart delivers MIL-H-5606 or MIL- H-83282 hydraulic fluid at a minimum rate of 1.2
gallons per minute (gpm) at 1,000 pounds per square inch (psi), and 0.4 gpm at 3,000 psi. The cart is mounted on two
wheels with semi-pneumatic tires for easy travel on the flight line. Operator's controls and indicators are located at the
front side of the cart under the control panel cover and on the controller stowed inside the cabinet. To familiarize using
personnel with the cart characteristics and physical makeup, a table of equipment data is presented in Table 1-1 and
some of the major components are identified in Figure 1-2.
1-9. Location and Description of Major Components. The major components (Figure 1-2) of hydraulic
kneeling/erecting cart are: frame/cabinet assembly, manifold assembly, motor and pump assembly, reservoir assembly,
hydraulic piping assembly, and the electrical wiring/components assembly.
a. Frame/Cabinet Assembly. The cart operating components, including the controls and indicators, are enclosed in a
welded steel cabinet, (Figure 1-2). The cabinet is supported on semi-pneumatic tires at the rear corners and legs at the
front corners. The legs have holes to facilitate in tiring down the cart for storage or during shipment. A handle is attached
to the cabinet for ease in controlling, while moving the cart. A hinged removable door at the rear of the cabinet and a
hinged control panel cover on top allow access to all internal components. The cabinet has an access to allow the power
cable and controller to remain out with the door in the closed position during operation. A drain hole is located at the
bottom of the cabinet. Three horizontally divided areas are available for storage of electrical cables and hydraulic hoses.
b. Manifold Assembly. The manifold assembly (Figures 1-2 and 1-3) houses the majority of controls and indicators used
on the cart. Six solenoid valves (for tall, left, and right) permit/receive fluid flow to/from helicopter struts while a seventh
solenoid valve allows fluid flow to recirculate to the oil reservoir when neither kneeling/erecting operations are being
performed. Three manual flow regulators (for tall, left, and right) control the amount of flow to/from helicopter struts.
Three quick disconnect couplings and dust caps (for tall, left, and right) are connected to the manifold at the front end. A
pressure gage to read pump pressure developed is connected to the manifold. A variable pressure relief valve to adjust
flow pressures between 100 and 3,000 psi is also attached to the manifold. The manifold assembly is easily accessible by
lifting up the control panel cover.