TM 55-1930-203-10
through overrunning clutches as the speeds of the two input shafts may not be exactly the same. Mechanical power from the
corresponding forward and aft engines is collected by the gathering box and delivered to the marine gear through a vertical drive
coupling. The marine gear controls the direction of rotation for the propeller and also serves as power sources for air compressor
and four master hydraulic pressure pumps. The marine gear directs power aft through the jackshaft and propeller shaft to the
propeller.
1
Brake assembly
9
Column and wheel drive
2
Transmission
10
Cargo well pump
3
Pillow block
11
Wheel
4
Torque converter
12
Miter box
5
Engine
13
Propeller shaft
6
Marine gear
14
Rudder
7
Gathering box
15
Propeller
8
Fluid coupling
16
Jackshaft
Figure 3-18. LARC LX propulsion system
b. Maintenance. Operator personnel are not authorized to perform maintenance on the marine drive system. Report all
defects to organizational maintenance.
3-13.Compressed Air System
a.
Description.
(1) General. The compressed air system performs the following functions.
(a) Cargo well pump control.
(b) Engine starting.
(c) Engine throttle control.
(d) Engine cutout control.
(e) Air horn control.
(f) Land braking.
(g) Tire inflation.
(h) Marine gear speed and direction control.
(i) Radiator fan control.
(j) Ramp raise-lower control.
(k) Ramp seal inflation.
(l) Transmission shifting control.
(m) Windshield wiper operation.
(2) Compressed air. Compressed air is supplied by two air compressors. Each air compressor is driven through a flexible
coupling connected between the marine gear and the
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