The control lever lockout system is a safety system designed to prevent two-
blocking during lifting operations. The control lever lockout system consists
of a hydraulic solenoid valve and two hydraulic lockout cylinders. The
cylinders are installed in the rod linkage between the control lever and the
appropriate directional control valve. The cylinders are connected in such a
manner as to prevent worsening the condition, i.e. hoist up or telescope out.
With the solenoid valve energized (normal), its hydraulic valve is closed,
allowing 200 psi (1379 kPa/13.79 bar) of hydraulic oil to be applied to the
rod side of the cylinders, which provides a solid link in the control rods.
Denergizing the solenoid valve allows the valve to open and removes the
hydraulic pressure from the cylinders. This removes the solid link from the
control rods and allows the directional control valve to move in a direction
that will improve the condition.
SPECIAL ARMY FEATURES REQUIRED.
Aircraft Towbar Stowage Provisions.
Per SCAMP procurement specification, stowage for one G.F.E. aircraft
towbar is provided on the right side of the crane. Stowage provisions
only are part of the crane weight and consist of two cradle assemblies
and hold down clamps. See figure 3-1 for stowage location.
Ground Handling Wheel Stowage Provisions.
Per SCAMP procurement specifications, stowage provisions for two
sets of G.F.E. aircraft ground handling wheel assemblies (not included
in crane weight) are provided on the left side of the crane. Stowage
provisions include two cradle weldments attached to the frame and
the top of the tool box. See figure 3-1 for stowage location.
Emergency Hand Pump Installation.
Per the SCAMP procurement specification, the design of the crane
includes a means to return the crane to travel mode after loss of
hydraulic power. The installation includes quick disconnect fittings in
crane function hydraulic circuits, a hand pump, length of hose,
bracket, and stowage provisions. See operating instructions, page