MEGA Corp. MCC-OPS-1 - Manual (Page 9)

MCC35-CAT735-1
5 Aug 2010
SECTION 2
System Description
2-2
Tailgate Restraint Assembly (Stinger)
A steel tube and plate assembly that mounts and
pivots on the rear of the tubular frame. The
tailgate restraint assembly (stinger) is designed
to raise and restrain container doors in a closed
position when the body assembly is down. A
hydraulic cylinder is mounted between the
tailgate and tubular frame to raise and lower the
assembly as commanded by the hoist control
lever when the vehicle is in motion. The
assembly can also be operated from the tailgate
remote body operation switches when the
vehicle is stationary.
Twistlocks Assemblies
The body assembly contains 4 twistlock
mechanisms located at each corners of the body
assembly. Each twistlock mechanism consists
of the 90° rotating block, hydraulic actuator
cylinder and a position sensor. The twistlocks
are designed to slide into the ISO container floor
receptacles as the container is lowered onto the
body assembly. Once the container is resting on
body assembly the twistlocks can then be
commanded to rotate 90° by using the in-cab
twistlock switch. The twisting action will allow
the lock to engage the container and secure the
container to the body assembly.
HYDRAULICS
The MCC35 hydraulic system uses chassis hoist
pressure for body and tailgate operation while
twistlock operation is accomplished by using
hoist pilot pressure. The MCC35 hydraulic
components consist of body lift cylinders,
tailgate control valve assembly, tailgate cylinder
counterbalance valve, tailgate cylinder, chassis
mounted
accumulator, twistlock solenoid
manifold, twistlock actuators and associated
hosing.
Body Lift Cylinders
The body lift cylinders are MCC specific and
are mounted to the bed and chassis like a dump
body. Cylinders hydraulic pressure and return is
routed through the chassis hoist valve as
controlled by the in-cab hoist lever. The
supplemental ECM controls the body lifting
angle and places a mid-point stop at an
application specific angle. The mid-point stop
is set to keep the tailgate from contacting the
ejected load or ground and damaging the
tailgate door. A hoist mid-point override switch
is used to reactivate the hoist valve for raising
the body to the full load ejecting position.
Tailgate
Restraint
Assembly
(Stinger)