Doosan DX140LCR-3 Manuel d'atelier - Page 11

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GENERAL DESCRIPTION

Theory of Operation

The swing motor final drive is a two-stage planetary gearbox
with two planet gears, two sun gears and two-stage output
reduction. The planetary gear engages the ring gear. The pinion
gear is connected to the output shaft and spline.
The final drive reduces swing motor rpm to increase swing motor
output torque. The available maximum swing speed provides a
fast turning rate for efficient, rapid work cycling with more than
adequate power for good acceleration.
Swing Reduction Gear
SP002526
Page 7