TM 55-1930-203-10
Figure 2-3. ire inflation check valve.
2-10. Cargo Well Pump Control Valves
The cargo well pump control valves (12, sheet 1, fig. 2-1) are three-position lever operated valves: midposition of lever is neutral,
back position of lever is for normal operation, forward position of the lever is for emergency operation. The valves activate the cargo
well pumps.
2-11. Steering Levers
The LARC has two steering levers (16, sheet 1, fig. 2-1) which control the hydraulic steering system for the front and rear wheels and
rudders. The front wheels are controlled by the port lever; the rear wheels are controlled by the starboard lever.
2-12. Horn Air Valve
The horns are operated by a pushbutton air valve (18, sheet2, fig. 2-1) located on the lower left side of the instrument panel.
2-13. Radiator Fan Motor Controls
The radiator fan motor controls (30, sheet 4, fig. 2-1) are located on the port bulkhead of the cab. Starting the fans is a manual
operation. To start the fans, the levers on the control valves are pushed down. To shut off the fans, the levers are lifted. The fans
are automatically stopped during marine operation. A small air cylinder automatically moves the four fan controls to stop position
when the port or starboard marine gear control valves (4) are placed in forward or reverse position.
2-14. Gear Shift Control Valve Lever
The gear shift control valve lever (31, sheet 4, fig. 2-1) located on the port bulkhead of the cab permits selection of any one of the
three forward gears or one reverse gear during land operation.
2-15.. Master Switch
starting engines and will be left on while the engines are running. The master switch (19, sheet 2, fig. 2-1) located on the left side of
the instrument panel, operates a master replay which controls the flow of current to the various main electrical system components.
This switch will be turned on before
2-16. Hand Throttles
There are four hand throttles (22, sheet 2, fig. 2-1) located in the center of the instrument panel. Each lever controls the speed of the
corresponding engine individually. Acceleration from idle to full speed is obtained by pushing the levers forward. When the levers
are pulled all the way
back, the engines will idle.
2-12
