Figure 7-45. Air compressor, removal and replacement. (Sheet 2 of 2).
(fig.7-47) are provided both at the front of the carrier and at
couplings are connected to the towing vehicle. Figure 7-
the rear. In addition, couplings are located between the
a check valve and
an ordinary on-off valve,
rear of the carrier to provide a "jumper" connection
both of which are used only at the front of the truck
between the carrier and the rear of the outrigger box.
crane, in the "Emergency" circuit. Note that the on-off
The dummy couplings are used to connect the truck
valve is shown in the off position, and should remain in
crane to another vehicle, similarly equipped. The truck
that position, except when the truck crane is being
crane can tow another vehicle when the other vehicle is
(2) Removal and replacement. To remove dummy
attached to the rear pintle hook and when the dummy
couplings are connected to the towed vehicle. The truck
couplings, disconnect the air lines at the swivel fittings,
crane can be towed by another vehicle when the front
pintle hook is mechanically connected to the other
bracket, and remove the dummy coupling.
vehicle and the dummy