SWING REDUCERS
SUB-SECTI0N 6B
SUB-SECTION 6B
SWING REDUCERS
transmitted to the sun gear of the final planetary reduction.
SWlNG REDUCER (53Z373)
The output of the final reduction is transmitted directly to
the swing pinion, which is mated to the ring gear of the
DESCRIPTION
slewing ring. Therefore, the upper will swing whenever
hydraulic oil is supplied to the hydraulic motor.
Swing reducer 53Z373 is an integral swing drive which con-
tains a double pianetary gear reduction, driven by a gear
type hydraulic motor, and a disc brake (see Figure 6B-1).
The disc brake is connected directly to the sun gear of the
6B-1).
primary planetary reduction and is a spring applied-
hydraulically released brake. The brake is released when
The hydraulic motor drives the sun gear of the primary
pressure is applied to the brake port. This pressure causes
planetary reduction. The output of the primary reduction is
Figure 6B-1. Swing Reducer (53Z373)
6B-1