Manitowoc Grove GRT8100 Service Manual

6-1
Published 3/26/2018, Control # 596-05
GRT8100 SERVICE MANUAL SWING SYSTEM
6
GROVE
SECTION 6
SWING SYSTEM
SECTION CONTENTS
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Swing Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Swing Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Swing Gearbox And Brake. . . . . . . . . . . . . . . . . . . 6-8
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Swing Bearing. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Swivels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
Hydraulic Swivel . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . 6-17
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
Two Port Water Swivel . . . . . . . . . . . . . . . . . . . . . 6-19
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19
Electrical Swivel . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . 6-20
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
Swing Lock Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22
360° Swing Lock Control (Positive Lock Type)
(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22
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. The term free swing means that, the
superstructure will swing freely after the Swing joystick is
released until it coasts to a stop or the Swing Brake Pedal is
depressed.
Swing is activated using a joystick in the cab. When the
Swing joystick 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. The maximum rotation is 2 rpm. Braking is
accomplished by depressing a Swing Brake Pedal which is a
proportionate control valve that provides a controlled braking
of the swing motion.
The swing system consists of a 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 swing 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 swing lock can only be
engaged when the boom is centered over the front or rear of
the carrier. Both swing locks are operated from the cab.

Manitowoc Grove GRT8100 Specifications

General

Brand	Manitowoc
Model	Grove GRT8100
Category	Construction Equipment
Language	English