Published 4-22-15, Control # 556-00 6-1
RT530E-2 SERVICE MANUAL SWING SYSTEM
SECTION 6
SWING SYSTEM
SECTION CONTENTS
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . 6-1
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Swing Gearbox And Brake. . . . . . . . . . . . . . . . . . . 6-7
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Swing Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Swivels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
Hydraulic Swivel . . . . . . . . . . . . . . . . . . . . . . . . . 6-16
Electrical Swivel. . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
INTRODUCTION
Description
The purpose of the swing system is to allow the crane
superstructure to rotate atop the carrier frame. The
superstructure swing system provides full 360 degree
rotation in both directions and is equipped with free swing
capabilities.
Swing is activated using the Swing Enable Switch. When the
swing lever is actuated, hydraulic pressure is routed to the
swing motor to drive the gearbox in the appropriate direction.
As the gearbox rotates, the pinion gear meshes with the
teeth on the swing bearing and rotates the superstructure.
Swing speed is regulated by the Control Lever (Joystick).
The maximum rotation speed is 2.0 - 2.5 rpm with no load.
Positioning the lever to the left or right actuates a control
valve through electric signal to provide 360 degree
continuous rotation in the desired direction. Braking is
accomplished by moving the control lever to the center and
applying Swing Brake Pedal or engaging the Swing Brake
Switch.
The swing system consists of an electric remote controller, a
directional control valve, the swing drive, the swing brake
assembly, the brake pedal and power brake valve, and a
swing brake release solenoid valve.
The crane is equipped with a pin type turntable lock as
standard and an optional 360 degree positive swing lock.
The 360 degree positive swing lock meshes with the swing
gear teeth at any point of rotation. The pin type turntable lock
will only lock the turntable in a straight ahead position over
the front of machine. Both swing locks are operated from the
cab.
Theory of Operation
Swing Drive
The hydraulic power for the swing drive (Figure 6-1) is
supplied by the engine driven hydraulic pump. Oil flows from
the pump to the hydraulic Port 5 swivel. Flow from the swivel
is routed to the service brake dual accumulator charge valve.
Bypass flow from the dual accumulator charge valve is
routed to the front steering flow divider valve in the swing
directional control valve. Bypass flow from the flow divider
valve is used to supply the swing directional control valve.
When the electronic control is positioned to select right or left
swing, the flow through the control valve is directed to the
swing motor. If the SWING BRAKE selector switch is in the
OFF position, the superstructure will rotate in the desired
direction. Shifting the control to neutral and depressing the
brake pedal will stop the swing.
Reference Only
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