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 TM 55-1905-220-14-1
g. When in reverse, (Figure 1-38) all parts that rotated in neutral at engine speed are still turning. However, when the
reverse clutch is engaged, the steel clutch plates make positive contact with the sintered-metal clutch plates. The
external lugs of the sintered-metal clutch plates drive the clutch spider which is spline-connected to the reverse pinion.
Therefore, the reverse pinion rotates in anti-engine 1/2 direction at engine speed when the reverse clutch is engaged.
The reverse pinion is meshed with the counter shaft gear which is keyed to the counter shaft. The propeller flange is
spline-connected to the counter shaft and, therefore, the flange rotates in engine direction when in the reverse position.
The counter shaft and propeller flange rotate at a reduced speed due to the ratio between the counter shaft gear and the
reverse pinion.
Figure 1-38. Marine Gear Power Flow-Reverse
1-73
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